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Synthesis of Zeolite from Waste Concrete Powder

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 2022年第5期69卷 208-212页

作者： Harada, Satori Kanda, Yasuyuki Mechanical Systems Engineering Course Graduate School of University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa903-0213 Japan Mechanical Engineering Program School of Engineering Faculty of Engineering University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa903-0213 Japan

This study investigated the conditions for zeolite synthesis from waste concrete powder (WCP) using the hydrothermal synthesis method. The WCP was prepared by milling the waste concrete using pot mill equipment. The synthesis conditions, i.e., the heating time, heating temperature, and NaOH solution concentration were varied. Furthermore, hydrochloric acid-treated WCP (WCP-HCl), which is removed the calcium component, was prepared to examine the effectiveness of acid treatment in the zeolite synthesis. The zeolite synthesis was investigated using X ray diffraction (XRD) and scanning electron microscopy (SEM). Analcime-type zeolite was synthesized using WCP and WCP-HCl. The requirements of synthesis conditions for analcime were as follows: heating time above 12 h, heating temperature above 433 K, and NaOH solution concentration above 2 mol/ L. With a progressive increase in the concentration of the NaOH solution from 5 to 7 mol/L, analcime could be synthesized at NaOH concentrations below 4 mol/L, while cancrinite was synthesized at NaOH concentrations exceeding 5 mol/L. The peak intensity of analcime and cancrinite of WCP-HCl showed high value in comparison to the WCP. Thus, the effectiveness of the HCl treatment of WCP was confirmed from the XRD patterns. ©2022 Japan Society of Powder and Powder Metallurgy.

关键词： Hydrothermal synthesis

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Comparative analysis of bioinspired algorithms for tuning a flatness-based controller: A ball and beam case study

Comparative analysis of bioinspired algorithms for tuning a ...

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Latin America Congress on Computational Intelligence (LA-CCI)

作者： M. A. Pastrana José Oniram de A. Limaverde Filho Luiz Henrique Oliveira Jaider Bautista Eugênio Fortaleza Daniel M. Muñoz Department of Mechanical Engineering Automation and Control Group (GRACO) University of Brasília Brasília Brazil Department of Electrical Engineering University of Brasília Brasília Brazil Faculty of Engineering Systems Undergraduate Program University of the Amazonia Florencia Colombia

ISBN: (数字)9798350374575

ISBN: (纸本)9798350374582

This paper provides a comprehensive comparative analysis of the performance of four bioinspired algorithms (Differential Evolution, Grasshopper Optimization Algorithm, Moth-flame Optimization, and Particle Swarm Optimization) in designing a flatness-based controller for a ball and beam system simulated in MATLAB/Simulink environment. The assessment involves the tuning of feedback gains utilizing four distinct fitness functions: Integral Square Error, Integral Absolute Error, Integral Time Absolute Error, and an ad-hoc cost function. Hypothesis tests are employed to choose the optimal controllers from each combination for every bioinspired algorithm and a fitness function. Subsequently, a control performance analysis of these controllers for the ball and beam system is conducted, focusing on critical parameters such as overshoot, settling time, and steady-state error. This analysis demonstrates that all the controllers achieve a zero steady-state error. Noteworthy is the flatness-based controller tuned with the bioinspired Grasshopper Optimization Algorithm and utilizing the Integral Time Absolute Error fitness function, which stands out for achieving the fastest response with the lowest overshoot. This particular controller emerges as the most recommended choice for the specified application.

关键词： Particle beams Focusing Cost function MIMO Steady-state Performance analysis Particle swarm optimization MATLAB Tuning Computational intelligence

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The effect of solution treatments, cooling rates, and natural aging times on the mechanical properties of 6061-T4 aluminum

The effect of solution treatments, cooling rates, and natura...

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59th Meeting of the Society for Machinery Failure Prevention Technology: Essential Technologies for Successful Prognostics

作者： Cullip-Brennan, P. Ordonez-Chu, A. Villalobos, E. Lee, E. McLennan, J. Clark, R. Ogren, J. Es-Said, O.S. National Science Foundation Research Experience for Undergraduate Program Mechanical Engineering Department Loyola Marymount University Los Angeles CA 90045 United States NAVAIR Code 4342 MS Building 2188 Patuxent River MD 20670-1908 United States Boeing Satellite Systems Inc. 2260 E. Imperial Hwy. EI Segundo CA 90245 United States

The influence of varying the thermal processing parameters on the physical and mechanical properties of 6061-T4 aluminum alloy was studied. The variables altered were solution treatment temperatures, quenching media and natural aging durations. The influence of varying these parameters on the tensile strength, electrical resistivity and hardness of the alloy is discussed and correlated.

关键词： Hardness

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Surface adhesion enhancement of A5052 aluminum alloy by surface texturing with a UV pulsed laser

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Keikinzoku/Journal of Japan Institute of Light Metals 2024年第1期74卷 18-21页

作者： Kuwano, Ryoichi Hino, Makoto Tokunaga, Tsuyoshi Nagata, Norihito Koga, Toshihiko Hagen, Nathan Otani, Yukitoshi Department of Mechanical Systems Engineering Faculty of Engineering Hiroshima Institute of Technology 2-1-1 Miyake Saeki-ku Hiroshima-shi Hiroshima731-5193 Japan Department of Innovative Mechanical and Electronic Engineering Faculty of Engineering Chiba Institute of Technology Narashino-shi Chiba Japan SURTECH NAGATA Co. Ltd. Akashi-shi Hyogo Japan Department of Mechanical Engineering Undergraduate course in Bachelor of Science in Manufacturing Technology Polytechnic University Kodaira-shi Tokyo Japan Center for Optical Research and Education（CORE） Utsunomiya University Utsunomiya-shi Tochigi Japan

We subjected an A5052 aluminum alloy sample to a dry and rapid surface treatment using 355-nm pulsed laser irradiation, and measured the effects of surface modification. We varied the laser irradiation pitch and found the processed surfaces to have an irregular and complicated topography up to a depth of about 5 μm. X-ray photoelectron spectroscopy (XPS) analysis of the material surfaces revealed that Al2O3 with a binding energy of 74 eV was formed regardless of laser irradiation, and that increased irradiation density accelerates surface oxidation. While the non-laser-irradiated areas exhibited hydrophobicity, laser-irradiated regions became superhydrophilic with a contact angle of less than 5°. We performed tensile shear tests on lap joint specimens produced at a beam scanning speed of 500 mm/s and a laser irradiation pitch of 5 μm, and obtained a joint strength of 10 MPa. These results indicate that UV pulsed laser irradiation is effective for fast surface modification. © 2024 The Japan Institute of Light Metals.

关键词： Aluminum oxide

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engineering the environmentally sound warship for the twenty-first century

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NAVAL ENGINEERS JOURNAL 1999年第3期111卷 189-217页

作者： Markle, SP Gill, SE McGraw, PS Udr. Stephen P. Markle USN is a career Engineering Duty officer assigned to Naval Sea Systems Command Arlington Virginia where he is Deputy Directs Environmental Programs Division (SEA 03L1 B). He is responsible fm program management activities associated with all ahat environmental protection equipment design and selection of environmental protection equipment and systems fm future surface ship designs (DD 21 CVN 7Z CW LPD 17) and serves on several teams designed to promote Nay wide awarmss of environmental protection requirements and Nay programs to meet these challenges. He is a 1993 graduate of the Naval Construction and Engineering Program at the Massachusetts Institute of Technology where he received a naval engineers degree and master of science in mechanical engineering. His interest in environmental issues predates his undergraduate studies at Syracuse Universityl State University of New Ymk College of Environmental Science and Fmestry where he received a bachelm of science degree in fmest engineering from the School of Environmental and Resource Engineering. LCdx Markle has qualified as a Surface Warfare Officer and in submarines through the Engineering Duty Dolphin Program he is a member of the Acquisition Professional Community and a graduate of the Defense Systems Management College Advanced Program Managers Course. He is a professional engineer registered in the State of New York and is a member ofthe American Society of Naval Engineers National Society of Professional Engineers American Society for Testing and Materials Society of Naval Architects and Marine Engineers and Society of Automotive Engineers. Peter 5. McGraw is current the Acting Branch Head ofthe Solid Waste Management Branch (Code 634) of the Environmental Quality Dwrtment of the Naval Surfice Warfare Centel: Carderock Division. As such he is responsible for among other things: the Shipboard Advanced Incinerator RDT&E Program the Submarine Plastic Waste RDT&E Program Solid Waste Processing Equipment Design Acquisitio

The past twenty-five years has been marked by the introduction ed marine environmental regulations that have had a profound effect on how ships are designed, built and operated. Ships being designed and built today must accommodate not only current regulations but anticipate those enacted over their thirty to fifty year life cycles. U.S. Chief of Naval Operations, Office of Environmental, Safety and Health (CNO N45) has articulated a vision for the Environmentally Sound Warship of the Twenty-first Century. This vision incorporates the "Sense of Congress" for a naval ship designed to operate in full compliance with environmental regulations worldwide. The task of the Navy engineering team is to translate this vision into reality;a ship capable of prevailing in time of war and able to conduct operations in all areas of the globe, unencumbered by special procedures for environmental compliance. The keys to this warship design are the early integration of environmentally sound principles, materials, and processes into the ship acquisition process;minimization of both hazardous materials and generation of post shipboard consumer waste during operation;adaptation of integrated systems to reduce the volume of wastes and enhance processing efficiency;reduced manpower requirements;and crew indoctrination in environmental protection.

关键词： Ships Environmental regulations engineering ARTICULATED Navy environmental security

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Synthesis of zeolites from calcareous waste concrete powder

Results in Materials

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Results in Materials 2022年 13卷

作者： Kanda, Yasuyuki Harada, Satori Mechanical Engineering Program School of Engineering Faculty of Engineering University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa 903-0213 Japan Mechanical Systems Engineering Course Graduate School of Engineering and Science University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa 903-0213 Japan

In this study, zeolites were synthesized from calcareous waste concrete powder (WCP) using a hydrothermal synthesis method. Effective utilization methods of waste concrete are required worldwide for prolonging the final dumping sites’ lifetime and for promoting a society that recycles. Calcareous concrete, which includes many calcium components, has been widely used. The WCP includes mainly calcite (at 66.9%) and quartz. First, we applied hydrothermal synthesis to raw WCP. However, X-ray diffraction analysis (XRD) revealed no zeolite synthesis. Next, we used the same approach on WCP-HCl (WCP with the calcium component removed by HCl treatment). For WCP-HCl, the synthesis of analcime-type zeolites was confirmed based on XRD and simple absorption tests, in which the WCP-HCl color changed from gray to blue upon its absorption of methylene blue. Finally, to determine the analcime synthesis requirements, we experimentally varied the synthesis. Analcime synthesis was observed at temperatures above 433 K after at least 12 h of heating and for NaOH solution concentrations above 2 mol/L. © 2021 The Authors

关键词： Analcime Hydrothermal synthesis method Recycle Waste concrete Zeolite

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Surface adhesion enhancement of anodized A5052 aluminum alloy with low-power atmospheric pressure plasma jets in order to recover wettability

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Keikinzoku/Journal of Japan Institute of Light Metals 2024年第8期74卷 352-357页

作者： Kuwano, Ryoichi Hino, Makoto Tokunaga, Tsuyoshi Ebisawa, Mizue Koga, Toshihiko Hagen, Nathan Nagata, Norihito Yamashita, Michiru Department of Mechanical Systems Engineering Faculty of Engineering Hiroshima Institute of Technology 2-1-1 Miyake Saeki-ku Hirosima-shi Hiroshima731-5193 Japan Department of Innovative Mechanical and Electronic Engineering Faculty of Engineering Chiba Institute of Technology Chiba Narashino-shi Japan Tokyo Metropolitan Industrial Technology Research Institute Koto-ku Tokyo Japan Department of Mechanical Engineering Undergraduate course in Bachelor of Science in Manufacturing Technology Polytechnic University Kodaira-shi Tokyo Japan Center for Optical Research and Education （CORE） Utsunomiya University Tochigi Utsunomiya Japan SURTECH NAGATA Co. Ltd. Hyogo Akashi Japan Hyogo Prefectural Institute of Technology Hyogo Kobe-shi Japan

We focused a low-power atmospheric pressure plasma jet (APPJ) on a specimen of anodized A5052 aluminum alloy with degraded surface wettability due to atmospheric exposure for more than 30 days. We show that an APPJ driven at about 10 W of power can restore surface wettability. To demonstrate this, specimens were irradiated with an APPJ using He as the carrier gas at a scanning pitch of 1 mm, a scanning speed of 10 mm/s, and a working distance of 20 mm between the glass tube and the specimen surface. Compared to the sample immediately after anodizing, the irradiated surface was found to have equivalent hydrophilicity, 88% of the fracture load in the tensile shear test, and 2% change from X-ray photoelectron spectroscopy (XPS) analysis of C and O on the specimen surface. Thus, short APPJ irradiation is effective in enhancing the surface wettability of specimens that have been exposed for more than 30 days from anodization. Furthermore, the surface modification technique attempted in this study can be applied to a wide range of multi-materials to enable the joining of dissimilar materials. © 2024 The Japan Institute of Light Metals.

关键词： Aluminum alloys

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CVN 68 class solid waste flow analysis

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NAVAL ENGINEERS JOURNAL 1998年第6期110卷 73-87页

作者： Markle, SP Gill, SE LCdr. Stephen P. Markely USN:is a career Engineering Duty Oficer assigned to Naval Sea Systems Command Arlington VA where he is Deputy Directol Environmental Protection Systems Division (SEA 03 LIB). He is responsible for Program Management activities associated with all afloat environmental protection equipment and serves on several teams designed to promote Navy wide awareraess of environmental protection requirements and Navy programs to meet these challenges. He is a 1993 graduate of the Naval Construction and Engineering Program at the Massachusetts Institute of Zchmlogy where he received a Naval Engineering Degree and Master of Science in Mechanical Engineering. His interest in environmental issues predates his undergraduate studies at Syracuse UniversitylState University of New York College of Environmental Science and Forestw where he received a Bachelm of Science degree in Forrest Engineering from the School of Environmental and Resource Engineeriw. LCdr Markle has qualified as a Surface Warfare Oficer and in submarines through Engineering Duty Dolphin Program. He is a Professional Engineer registered in the State of New York and is a member ofASNE NSPE ASTM SNAME and SAE. Sean G. Gill:is a Senior Engineer with GEO-CENTERS incorporated in Pittsburgh PA where he provides technical and administrative support to the Naval Sea Systems Command (SEA 03L1) and the Carderock Division of the Naval Surfme Waflare Center (Code a) principal& on the shipboard and submarine solid waste management programs. Prior to joining GEO-CENTERS incorporated in 1996 he worked for eleven years at the Carderock Division of the Naval Surfme Warfare Center as a project engineer and a Branch Head. In the former capacity Mr Gill participated in various blackwatel gray watel and oily wastewater treatment projects oversaw the development of the Navy Pulper and was Center's technical team leader for the NAVSEA Solid Waste management program. In 1994 he was assigned to be Branch Head of Code 634 the Solid Waste Management

Through a detailed Research and Development program, the U.S. Navy has developed a suite of shipboard solid waste management equipment enabling compliance with federal and international law. Four major equipment types have been developed to outfit twenty-seven classes of naval surface ships. The major equipment types are: Plastic Waste Processor (PWP), Metal/Glass Shredder (MGS), Large Pulper (LP), and Small Pulper (SP). The Navy is aggressively procuring and installing this equipment aboard all ships of FFG 7 Class and larger. A deadline of December 31, 2000 has been set for completion. engineering analysis and held waste generation studies were conducted to select the specific equipment suite and develop alteration documentation for each ship class. Specific factors in this process were: solid waste generation rates, equipment reliability analysis, ship arrangement considerations, daily equipment operation Limits, and shipboard quality of life issues. A solid waste management study was conducted in the fall of 1997 to validate Navy equipment and ship design parameters onboard the USS John C. Stennis (CVN 74). Generation rates for shipboard solid waste were determined for plastic, metal and glass, food, paper, cardboard, fabric and wood. engineering analysis of data allowed a decrease in CVN 68 Class design waste generation rates. engineering analysis enabled a reduction in the number of PWPs and MGSs required, and fewer spaces for efficient operation. Ship arrangement studies were conducted to optimize efficiency and equipment mix of Solid Waste Processing Rooms (SWPRs) relative to waste generation sites. This paper briefly articulates the process followed by the Navy in responding to regulations governing solid waste management in the marine environment. Evidence validating the engineering procedures followed is presented.

关键词： Ship equipment

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OPPORTUNITIES FOR PACIFIC FLEET FF-1052 CLASS SHIPS TO SAVE ENERGY

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NAVAL ENGINEERS JOURNAL 1985年第4期97卷 315-321页

作者： PEHLIVAN, H KENYON, CW Hasan Pehlivan:received his BS in marine engineering from the Merchant Marine Academy (Turkey) in 1971 and his MS degree from Old Dominion University (Norfolk) in 1975. He was employed by D.B. Cargo Line (Turkey) as an engineering officer on ocean-going cargo vessels from 1971 to 1973. After receiving his masters degree in power engineering in 1975 he was employed by J.J. Henry Co. Inc. in Washington DC where he was involved in supporting the DTNSRDC Shipboard Energy Conservation Program which included the development of the steam system simulation (STMSYS) heat balance computer program for FF-1052/1078 class frigates. In addition he was cognizant engineer for various fluid systems designs for PCG and CSGN. In 1978 he joined M. Rosenblatt & Sons Inc. where he was cognizant engineer for various fluid systems designs for CVV DDG-51 and ARS-50. He was also leading engineer in support of DTNSRDC for the development of innovative machinery options for the baseline DD-963. In 1980 he joined NKF Engineering Inc. where he directs and performs DTNSRDC ship energy conservation analyses for frigates cruisers destroyers and aircraft carriers. He has been assisting the NAVSEA energy office in directing and performing Ship Energy Conservation Assist Team (SECAT) surveys aboard Navy ships since 1982. Mr. Pehlivan is currently manager of ship auxiliary systems in charge of the design and development of fluid systems pollution abatement distilling plants etc. He is a member of ASNE. Clarence W. Kenyon:graduated from the State University of New York Maritime College in 1960 and sailed on a third assistant engineer's license with Isbrandtsen Steamship Company before accepting an engineering position with the Long Beach Naval Shipyard in 1961 where he worked in the Steam Propulsion and Auxiliaries Section and the Mechanical and Hydraulic Section. He also taught a course in engineering fundamentals to engineering technicians in the evenings. In 1963 he accepted a position with the Space Division of North American Avia

The shipboard energy conservation assist team (SECAT) program was introduced to the US Pacific Surface Fleet (SURFPAC) in 1983 following one year testing in the US Atlantic Surface Fleet (SURFLANT). Experiences aboard SURFLANT ships had provided the basis for improvements which could also be applied to SURFPAC ships. Chief among these improvements were simple fuel measurement, fuel curve development methods, an energy survey checklist, and an equipment status board which identifies economic machinery alignments. The first SURFPAC ship to receive a SECAT visit was a FF-1052 class ship. Fuel consumption was significantly higher on this ship than the six FF-1052/1078 class SURFLANT ships previously visited. SECAT immediately looked for reasons for this increase in fuel consumption. Three significant changes received by this ship and not received by the six SURFLANT ships were identified. They were a new design economizer, Navjet vice Wallsend burners, and removal of overload control valves on the forced draft blowers. Another SURFPAC frigate with the same three changes was visited to validate the results obtained from the first ship. This paper discusses recent improvements to the SECAT program. It also examines the differences in fuel consumption observed between SURFLANT and SURFPAC FF-1052/1078 class ships. The economics of potential solutions to the higher fuel consumption problem aboard SURFPAC ships is analyzed with special emphasis on alternative burner designs and forced draft blower changes. Recommendations are made to reduce fuel consumption both by equipment changes and expanded energy initiatives.

关键词： NAVAL VESSELS

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RACER - A DESIGN FOR MAINTAINABILITY

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NAVAL ENGINEERS JOURNAL 1985年第5期97卷 139-146页

作者： DONOVAN, MR MATTSON, WS Michael R. Donovanis a 1974 graduate of the United States Naval Academy where he received his undergraduate degree in naval architecture. In 1975 he received a master of science degree in naval architecture and marine engineering from the Massachusetts Institute of Technology. After completing the Navy's nuclear power training program he served as machinery division officer in USSBainbridge (CGN-25) and chemistry and radiological controls assistant in USSLong Beach (CGN-9). He successfully completed the Navy's surface warfare officer qualification and passed the nuclear engineer's examination administered by Naval Reactors. He was then assigned to the Ship Design and Engineering Directorate (SEA-05) Naval Sea Systems Command as head systems engineer on the DDG-51 ship design project where he received the Navy Commendation Medal for outstanding performance. He is currently with Solar Turbines Incorporated as manager ship integration and integrated logistic support for the Rankine cycle energy recovery (RACER) system. Mr. Donovan has lectured at Virginia Polytechnic Institute teaching marine engineering and has given presentations on ship design at various symposiums and section meetings for both ASNE and SNAME. He has been a member of ASNE and SNAME since 1972 and is registered as a professional engineer in California and Virginia. Wayne S. Mattsonreceived his B.S. degree in mechanical engineering from Western New England College in 1972. Following graduation he attended Naval Officer Candidate School and was subsequently assigned as a project officer to COMOPTEVFOR where he was responsible for technical and operational test plans their execution and final equipment appraisal. Following a tour as engineering officer aboard the USSNespelen (AOG-55) he was assigned as commissioning MPA aboard the USSElliot (DD-967) the fifthSpruanceclass destroyer. For the past six years he has been employed by Solar Turbines Incorporated in program management within the advanced development department. He is currently

There is a great deal of emphasis currently in the Navy on the issues of reliability and maintainability. If a system or component is out of commission, it obviously cannot perform its mission. Thus, systems and components must be reliable, with low failure rates, and maintainable, with short repair times when the system does become inoperable. To be effective, these attributes must be incorporated into new ship systems early in the design stage. The Rankine cycle energy recovery (RACER) system is a heat recovery steam cycle designed to recover energy from the exhaust of an LM2500 gas turbine for augmentation of a ship's propulsion system. The RACER system provides several advantages to a gas turbine powered ship, one of which is improved fuel efficiency for significant annual fuel savings. This saving does not come free, however, since, in general, any additional system installed in the ship will have some maintenance requirements. In keeping with the Navy's current emphasis, a key philosophy in the design of the RACER system has been to minimize this maintenance burden. After a brief description of the RACER system and its design philosophy, the techniques being used during the design phase to minimize the maintenance burden on the fleet are presented. Trade-off studies concerning acquisition versus life-cycle costs, including fuel and maintenance costs, are discussed. Innovations incorporated into this state-of-the-art system are reviewed with an emphasis on design for affordability.

关键词： COGENERATION PLANTS

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