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2021 40th International Conference on Ocean, Offshore and Arctic engineering, OMAE 2021

作者： das Chagas, Bruno Luiz Barbosa Morooka, Celso Kazuyuki Technology and Innovation Department Ocyan SA Macae - RJ Brazil Faculty of Mechanical Engineering University of Campinas Campinas-SP Brazil Graduate Program in Petroleum Science and Engineering University of Campinas

ISBN: (纸本)9780791885147

Advances in subsea exploration in the oceans to discover new petroleum reservoirs and sometimes different kind of minerals at the seabed in ultra deepwater, continuously introduce new challenges in offshore drilling operations. This motivates the development of increasingly safe maritime operations. In offshore petroleum, a marine drilling riser is the pipe that connects a wellhead at the sea bottom to a drillship at the sea surface, as an access to the wellbore. It serves as a guide for the drilling column with the drill bit and conductor to carry cuttings of rock coming from the wellbore drilling and its construction. Drilling riser is constantly exposed to adversity from the environment, such as waves, sea currents and platform motions induced by waves. These elements of the environment are prevailing factors that can cause a riser failure during deepwater drilling operations with undesirable consequences for the environment. In the present work, key parameters that influence the probability of fatigue failure in a marine drilling riser are identified, and a parametric evaluation with those parameters are carried out. Dynamic behavior of a riser is previously calculated and fatigue damage is estimated. Afterwards, the First Order Reliability Method (FORM) is applied to determine the probability of fatigue failure on the riser. Fundamentals of the procedure are described, and results are illustrated through the analysis for a typical riser in deepwater drilling operation. Parametric evaluations are done observing points considered as critical along the riser length, and looking to the sensitivity of key parameters in the process. For this study, the SN curve from API guidelines is applied and accumulated fatigue damage is estimated from simulations of the stress time series and applying the Palmgren-Miner's rule. Finally, the influence of each parameter in the reliability of fatigue failure is verified and discussions given. Copyright © 2021 by ASME

关键词： Reliability

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Developments in the utilization of heterogeneous catalysts for biodiesel generation: An update on recent advancements

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Journal of the Taiwan Institute of Chemical Engineers 2024年

作者： Parameshwar, Sai Agnihotri, Mayank Bhan, Uday Nangan, Senthilkumar Verma, Deepak Rajendran, Saravanan Jain, Siddharth Department of Petroleum Engineering and Earth Sciences UPES Dehradun248007 India Metallurgy and Materials Science Research Institute Chulalongkorn University Bangkok10330 Thailand International Graduate Program of Nanoscience and Technology Chulalongkorn University Bangkok10330 Thailand Instituto de Alta Investigacion Universidad de Tarapacá Arica1000000 Chile Department of Mechanical Engineering UPES Dehradun248007 India

Background: Biodiesel is one of the ecofriendly energy sources that can be generated from edible, non-edible, waste, and algae feedstocks. Over time, the utilization of different kinds of heterogeneous catalysts has been proven critical in the manufacture of biodiesel from diverse feedstocks. They exhibit better reusability and easier separation compared to the homogenous catalysts. Methods: In this work, the advances in the use of heterogeneous catalysts for biodiesel production from 2018 to 2024 have been evaluated. The process parameters like alcohol to oil molar ratio (M/O), catalyst concentration (%), reaction time and reaction temperature (RT), reusability of the catalyst, etc. are evaluated. The catalysts derived from waste materials through the calcination process are an efficient and cost-effective substitute for conventional catalysts. Nanomaterials, due to their small size and higher aspect ratio, provide very high efficiency and reusability in catalytic reactions. Significant findings: The heterogeneous catalysts are also found to be highly reusable for multiple cycles and the leaching of active sites, clogging of pore spaces of catalyst, etc. are the major causes of catalyst deactivation. Magnetic heterogeneous catalysts have shown good biodiesel yields and high reusability. Also, naturally occurring calcium oxide and potassium compounds present in waste derived catalysts helped to give high biodiesel yields. The future direction in the path of development of heterogeneous catalysts from cheap, abundant, and environmentally benign materials. The synthesis of heterogeneous catalysts from waste materials addresses the issue of waste disposal and converting solid waste to value-added catalysts. The life cycle assessment studies, encompassing heterogeneous catalyst synthesis, feedstock oil extraction, biodiesel production, and fuel combustion may give valuable input on the environmental impact of the entire process. © 2024

关键词： Potassium compounds

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Terpyridine-Based Sensors for Metal Ion Detection: High Sensitivity, Selectivity, and Computational Analysis of Binding Mechanisms

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Journal of Inorganic and Organometallic Polymers and Materials 2025年 1-27页

作者： Mughal, Ehsan Ullah Naeem, Nafeesa Bozkurt, Ebru Pandey, Sujeet Kumar Sadiq, Amina Ogaly, Hanan A. Al-Zahrani, Fatimah A. M. Alzahrani, Abdullah Y. A. Department of Chemistry University of Gujrat Gujrat Pakistan Program of Occupational Health and Safety Vocational College of Technical Sciences Atatürk University Erzurum Turkey Department of Nanoscience and Nanoengineering Graduate School of Natural and Applied Sciences Atatürk University Erzurum Turkey Department of Chemical and Biochemical Engineering Rajiv Gandhi Institute of Petroleum Technology Jais India Department of Chemistry Govt. College Women University Sialkot Pakistan Chemistry Department College of Science King Khalid University Abha Saudi Arabia Department of Chemistry Faculty of Science King Khalid University Abha Saudi Arabia

In this study, new terpyridine ligands (1 and 2) were synthesized and their potential as chemosensor was investigated. Firstly, structural and optical characterization of the newly synthesized compounds 1 and 2 were performed by NMR, HRMS analyses, UV-vis. absorption and fluorescence spectrophotometer. To the best of our knowledge, the novelty of this study lies in the exceptional chemosensor potential demonstrated by our synthesized compounds, surpassing those reported in the literature. Solvent-dependent optical behavior was explored in thirteen different solvents, identifying ethanol as the optimal medium for sensor studies. The ion selectivity of 1 and 2 was examined against 20 different metal cations, revealing that compound 1 functions as a colorimetric sensor for Fe2+ and Fe3+, while compound 2 acts as a colorimetric sensor for both Fe2+, Fe3+ and Cr3+ and a fluorometric sensor for Zn2+ and Cd2+. With compound 1, the detection limits for Fe2+, Fe3+ were determined as 0.18 and 1.41 µM, respectively, and with compound 2, the detection limits for Fe2+, Fe3+, Cr3+, Zn2+ and Cd2+ were determined as 2.22, 0.22, 11.63, 0.31 and 2.50 µM, respectively. Both sensors demonstrated high selectivity and minimal interference from other cations. Furthermore, reversibility studies with EDTA confirmed the regenerative sensing ability of 2 for Zn2+ and Cd2+ detection. The binding mechanisms of compounds 1 and 2 with the detected ions (Fe2+, Fe3+, Cr3+, Zn2+ and Cd2+) were determined by FTIR measurements. Moreover, the validation of the detecting capabilities of chemosensors 1 and 2 is obtained using Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) calculations, utilizing FMO and UV-Vis analyses to gain insights into their electronic structures and photophysical properties. The experimental findings were supported by computational studies, elucidating the electronic transitions and binding mechanisms. These findings indicate that the synthesized terpyridine-based

关键词： Colorimetric Cr3+ DFT Fe2+ Fe3+ Fluorescence Fluorometric TD-DFT Terpyridine UV-vis Zn2+ and Cd2+

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Optimising phase change materials for ventilated building components in sustainable building design: a comprehensive review

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Energy and Buildings 2025年 343卷

作者： Rashid, Farhan Lafta Al-Obaidi, Mudhar A. Hatem, Wadhah Amer Al Maimuri, Najah M.L. Ameen, Arman Ahmad, Shabbir Agyekum, Ephraim Bonah Kadhim, Saif Ali Hammoodi, Karrar A. Petroleum Engineering Department College of Engineering University of Kerbala Karbala56001 Iraq Technical Instructor Training Institute Middle Technical University Baghdad10074 Iraq Middle Technical University Technical Institute of Baquba Diyala Baquba32001 Iraq Building and Construction Techniques Engineering Department College of Engineering and Engineering Techniques Al-Mustaqbal University Hillah Babylon51001 Iraq Department of Building Engineering Energy Systems and Sustainability Science University of Gävle Gävle801 76 Sweden Graduate Program of Ocean Engineering School of Engineering Universidade Federal do Rio Grande Italia Avenue km 8 Rio Grande96201-900 Brazil Institute of Geophysics and Geomatics China University of Geosciences Wuhan430074 China Department of Nuclear and Renewable Energy Ural Federal University Named after the First President of Russia Boris Yeltsin 19 Mira Street Ekaterinburg620002 Russia Western Caspian University 31 Istiglaliyyat Street BakuAZ1001 Azerbaijan Istanbul Okan University Tuzla Campus Tuzla Istanbul34959 Turkey College of Mechanical Engineering University of Technology – Iraq Baghdad Iraq College of Engineering University of Al Maarif Al Anbar Iraq

The rise in energy-efficient, sustainable building operations necessitates the development of advanced innovations that reduce heating and cooling demands while maintaining comfortable indoor thermal conditions. Phase change materials (PCMs) demonstrate significant potential as a stabilization mechanism through latent heat storage for managing residential indoor temperatures;however, their integration into systems requires further optimisation. This review examines PCM-assisted ventilation technologies—specifically ventilated façades, roofs, and windows—highlighting their energy performance, which ranges from 7.7 % to 32.8 %, and their capacity to reduce peak temperatures by 2.5 °C to 7.02 °C. These improvements are influenced by PCM thickness of 15–35 mm and melting temperatures of 15–37 °C. The combination of PCM-enhanced hybrid systems with natural or mechanical ventilation has shown greater operational effectiveness, particularly in hot climates and when integrated with adaptive control systems to achieve optimal performance. Despite their benefits, widespread adoption of PCM technologies is hindered by high material costs, hysteresis effects, and limited discharge cycle efficiency. Nevertheless, PCM-enhanced ventilation systems have proven capable of supporting sustainable, low-energy buildings. Continued research is needed to develop cost-effective design strategies, automated control mechanisms, and climate-responsive optimisations to fully realize their potential. © 2025 The Author(s)

关键词： Apartment houses

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Response analysis of groundwater-bearing layers in Bandung groundwater basin due to variations of potential ground motions from Lembang fault

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AIP Conference Proceedings 2023年第1期2598卷

作者： M. F. N. Putra L. E. Widodo Graduate Student of Groundwater Engineering Program Faculty of Earth Science and Technology Bandung Institute of Technology Bandung Indonesia Research Group on Earth Resources Exploration Faculty of Mining and Petroleum Engineering Bandung Institute of Technology Bandung Indonesia

This paper focuses on the effects of potential ground motion variations in the range of 6.6–7.2 Mw from the Lembang Fault on the dynamic response of groundwater (Gw)-bearing laye...

This paper focuses on the effects of potential ground motion variations in the range of 6.6–7.2 Mw from the Lembang Fault on the dynamic response of groundwater (Gw)-bearing layers in the Bandung Groundwater Basin. The dynamic response of the soil deposits is considered as a one-dimensional model due to the vertical shear wave propagation therein, influenced by local soil conditions or properties that are linear viscoelastic with variable damping. Meanwhile, the bedrock is considered an elastic medium upon which the shear wave propagates due to ground motion. The ground motion may cause the liquefaction of Gw-bearing layers near the bedrock with intensities starting from 6.8 Mw. Ground motions in the range of 6.6–7.2 Mw can cause peak ground acceleration at the ground surface ranging between 0.15–0.25 gal.

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Trends in bimetallic nanomaterials and methods for fourth-generation glucose sensors

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TrAC - Trends in Analytical Chemistry 2023年第1期162卷

作者： Naikoo, Gowhar A. Arshad, Fareeha Hassan, Israr U. Omar, Fatima Ba Tambuwala, Murtaza M. Mustaqeem, Mujahid Saleh, Tawfik A. Department of Mathematics and Sciences College of Arts and Applied Sciences Dhofar University SalalahPC 211 Oman College of Engineering Dhofar University SalalahPC 211 Oman Lincoln Medical School University of Lincoln Brayford Pool Campus LincolnLN6 7TS United Kingdom Department of Chemistry National Taiwan University No. 1 Section 4 Roosevelt Road Taipei10617 Taiwan Nano-Science and Technology Program Taiwan International Graduate Program Institute of Physic Academia Sinica Taipei106 Taiwan Department of Chemistry King Fahd University of Petroleum & Minerals Dhahran31261 Saudi Arabia

Diabetes mellitus is one of the most rapidly rising chronic diseases around the globe. To combat these rising numbers, active research has been done in recent years to enhance the sensitivity, selectivity, and specificity of glucose biosensors. Despite the easy availability of these enzymatic glucose sensors, these have demonstrated limitations like low stability, short shelf-life, and being easily altered by physical and chemical environmental factors. To overcome these limitations, non-enzymatic sensors, also called fourth-generation glucose sensors, have been developed. These sensors use nanomaterials and do not employ any enzymes therefore exhibit better shelf life, improved sensitivity, and allow for quick detection of glucose without needing additional steps. In recent years, bimetallic nanocomposite-based fourth-generation glucose sensors have gained widespread attention from the scientific community. Owing to the synergistic effect of two distinct metal nanomaterials, these sensors show enhanced reproducibility and excellent stability as compared to monometallic nanomaterials. In this review, we aim to represent a comprehensive overview of the recent developments in the development of bimetallic nanocomposite-based glucose sensors for rapid and accurate glucose detection. After a brief introduction, we discussed the various bimetallic nanomaterials developed in recent years, followed by a discussion on the mechanism of action of such sensors. We then briefly discussed the industrial challenges of developing such sensors and discussed the advantages and disadvantages of bimetallic nanomaterial-based sensors. We finally concluded the review by highlighting the future perspectives of this new and upcoming field. © 2023 Elsevier B.V.

关键词： Glucose sensors

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Sustainable biorefinery with Chlorolobion braunii cultivated in produced water: Bioremediation integrated with the production of exopolysaccharides, biodiesel, and bio-oil

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Chemical engineering Journal 2025年 518卷

作者： Jadson dos Santos França Ravena Maria de Almeida Medeiros Ingrid Rocha Teixeira Jânia Betânia Alves da Silva Denilson de Jesus Assis Carolina Oliveira de Souza Rosangela Regia Lima Vidal Bianca Bomfim Andrade Fernanda Teixeira Cruz José Geraldo Pacheco Roger Fréty Lucas Guimarães Cardoso Graduate Program in Chemical Engineering (PPEQ) Polytechnic School Federal University of Bahia (UFBA) Salvador Bahia Brazil Center of Science and Technology Mechanical Engineering Collegiate Federal University of Recôncavo of Bahia (UFRB) Cruz Das Almas Bahia Brazil School of Exact and Technological Sciences Salvador University Salvador Bahia Brazil Graduate Program in Food Sciences Faculty of Pharmacy Federal University of Bahia (UFBA) Salvador Bahia Brazil Department of Physical Chemistry Institute of Chemistry Federal University of Bahia (UFBA) Salvador Bahia Brazil Health Sciences Institute Federal University of Bahia (UFBA) Salvador Bahia Brazil Catalysis and Materials Laboratory Department of General and Inorganic Chemistry Institute of Chemistry Federal University of Bahia (UFBA) Salvador Bahia Brazil Federal University of Pernambuco (UFPE) Center of Technology and Geosciences Department of Chemical Engineering Institute for Petroleum and Energy Research (i-LITPEG) Laboratory of Refining and Cleaner Technology (Lateclim) Recife PE 50740-540 Brazil

petroleum extraction generates large volumes of produced water (PW), which is an effluent containing high concentrations of pollutants that impact the environment and present a significant environmental liability for the fossil fuel industry. Among the various treatment approaches, biological methods—particularly those involving microalgae—have shown promise for PW remediation. In this study, we evaluated the bioremediation potential of PW using a microalga Chlorolobion braunii cultivated in 250 L photobioreactors. C. braunii was cultivated in a mixture containing 50 % PW and 50 % BG-11 (Blue green 11) medium (PW50%), while the control comprised only the BG-11 medium. Results demonstrated high removal efficiencies for nitrate (99.54 %), phosphate (77.78 %), iron (94 %), and manganese (75 %), along with a reduction in alkalinity (61 %). A total of 40 g of biomass was produced using 100 L of PW, containing 8.50 % lipids. This biomass mainly contained palmitic acid (C16:0) and elaidic acid (C18:1ω9t), indicating its suitability for biodiesel production according to the International Quality Standards of the American Society for Testing and Materials (ASTM D6751 ) and the Brazilian National Agency of petroleum, Natural Gas, and Biofuels (ANP). The biomass also yielded 35.12 % bio-oil and 57.69 % non-condensable gases during pyrolysis. Furthermore, 30 g of exopolysaccharides (EPS) were obtained, which exhibited pseudoplastic characteristics—a property of industrial interest. Thus, the treatment using 50 % PW for the cultivation of C. braunii was deemed a promising strategy for bioremediation and facilitated the production of high-value bioproducts.

关键词： Bioproducts Chlorolobion braunii Microalgae biorefinery Produced water Wastewater treatment

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The Effect of Mangrove on Fish Catch Using Belat at Teluk Pemedas and Sanipah of Kutai Kartanegara Regency, East Kalimantan Province, Indonesia 2

The Effect of Mangrove on Fish Catch Using Belat at Teluk Pe...

引用

2nd International Conference on Energy, Environmental and Information System, ICENIS 2017

作者： Sulaiman, Bustam Bambang, Azis Nur Purnaweni, Hartuti Lutfi, Mohammad Doctoral Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Faculty of Fishery and Ocean Diponegoro University Semarang50275 Indonesia Master Program of Environmental Science School of Post Graduate Studies Diponegoro University Semarang50275 Indonesia Faculty of Social Science and Political Science Diponegoro University Semarang50275 Indonesia Department of Oil and Gas Processing Engineering STT MIGAS Balikpapan76127 Indonesia Department of Petroleum Engineering STT MIGAS Balikpapan76127 Indonesia

The increasing population at Teluk Pemedas and Sanipah coastal areas of Kutai Kartanegara Regency, East Kalimantan Province, has led to coastal degradation. The problem was mainly caused by conversion of mangrove into aquaculture, agriculture, plantation industrial, and residential areas. This research was a study case, used descriptive analysis to describe the local fishermen activity using belat traditional device to catch fish. The results revealed that there were many fishermen still did not know the benefits of mangrove for economy growth, ecological, ecotourism etc. This condition affects to the decline of the mangrove function. Fisherman who used belat often move from one location to another location in order to find places that have many catches. The belat which are placed in good environment mangrove areas produces lots of catches that greatly benefit the fisherman, therefore mangrove ecosystem must be well preserved for the sustainability of fishermen's efforts to earn a living. © 2018 The Authors, published by EDP sciences.

关键词： Fish

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A crossover from Kondo semiconductor to metallic antiferromagnet with 5d-electron doping in CeFe2Al10

arXiv

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arXiv 2021年

作者： Tripathi, Rajesh Adroja, D.T. Lees, M.R. Sundaresan, A. Langridge, S. Bhattacharyya, A. Anand, V.K. Khalyavin, D. Sannigrahi, J. Cibin, G. Hillier, A.D. Smith, R.I. Walker, H.C. Muro, Y. Takabatake, T. ISIS Facility STFC Rutherford Appleton Laboratory ChiltonOxonOX11 0QX United Kingdom Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur Bangalore560064 India Highly Correlated Matter Research Group Physics Department University of Johannesburg Auckland Park2006 South Africa Department of Physics University of Warwick CoventryCV4 7AL United Kingdom Department of Physics Ramakrishna Mission Vivekananda Educational and Research Institute Belur Math HowrahWest Bengal711202 India Helmholtz-Zentrum Berlin für Materialien und Energie GmbH Hahn-Meitner Platz 1 BerlinD-14109 Germany Department of Physics University of Petroleum and Energy Studies DehradunUttarakhand248007 India Diamond Light Source Harwell Science and Innovation Campus Didcot OxfordshireOX11 0DE United Kingdom Liberal Arts and Sciences Faculty of Engineering Toyama Prefectural University Imizu939-0398 Japan Quantum Matter Program Graduate School of Advanced Science and Engineering Hiroshima University Higashi-Hiroshima739-8530 Japan

We report a systematic study of the 5d-electron-doped system Ce(Fe1−xIrx)2Al10 (0 ≤ x ≤ 0.15). With increasing x, the orthorhombic b axis decreases slightly while accompanying changes in a and c leave the unit cell volume almost unchanged. Inelastic neutron scattering, along with thermal and transport measurements, reveal that for the Kondo semiconductor CeFe2Al10, the low-temperature energy gap which is proposed to be a consequence of strong c-f hybridization, is suppressed by a small amount of Ir substitution for Fe, and that the system adopts a metallic ground state with an increase in the density of states at the Fermi level. The charge or transport gap collapses (at x = 0.04) faster than the spin gap with Ir substitution. Magnetic susceptibility, heat capacity, and muon spin relaxation measurements demonstrate that the system undergoes long-range antiferromagnetic order below a Néel temperature, TN, of 3.1(2) K for x = 0.15. The ordered moment is estimated to be smaller than 0.07(1) µB/Ce although the trivalent state of Ce is confirmed by Ce L3-edge x-ray absorption near edge spectroscopy. It is suggested that the c-f hybridization gap, which plays an important role in the unusually high ordering temperatures observed in CeT2Al10 (T = Ru and Os), may not be necessary for the onset of magnetic order with a low TN seen here in Ce(Fe1−xIrx)2Al10. Copyright © 2021, The Authors. All rights reserved.

关键词： Antiferromagnetism

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Numerical evaluation of the pressure drop in multiphase flow of the catenary riser with the presence of leakage

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Defect and Diffusion Forum 2016年 366卷 157-165页

作者： De Almeida Tavares, Daniela Passos Simões Sarmento, Lígia Rafaely Barbosa Barbosa, Enivaldo Santos De Farias Neto, Severino Rodrigues De Lima, Antonio Gilson Barbosa Federal University of Campina Grande Center of Science and Technology Post Graduate Program in Chemical Engineering Campina GrandeParaíba58429-900 Brazil Federal University of Campina Grande Center of Science and Technology Petroleum Engineering Department Campina GrandeParaíba58429-900 Brazil Federal University of Campina Grande Center of Science and Technology Mechanical Engineering Department Campina GrandeParaíba58429-900 Brazil

The growing demand for oil brings the need for discovery of deeper reservoirs, especially of ultra-deepwater reservoirs. Thus, production in marine systems using components such as risers (flexible or rigid pipes) has been the focus of many studies in different areas. These ducts are used in the transportation of multiphase fluids (oil, water and gas) produced from the oil well located on the seabed to the platform surface. Due to the extreme conditions present in the offshore fields of production, the equipments that transport produced fluids operate close to their limits. So eventually, the flexible pipes may have structural integrity faults like leaks, which can cause production losses, accidents with victims and environmental disasters. The leak depends of a number of properties or parameters measured at the site of the leak, for example, integrity of the pipe material, release of fluids and noise emission characteristics or manifestation of some other type of signal behavior, variation of pressure drops close to the leak, among others. There are a variety of techniques available for detecting leaks, among which there is the mathematical modeling approach using computational techniques. In this context, this paper aims to study the fluid dynamics of a transient multiphase flow in a catenary riser in the presence of leakage. Herein a 3D Eulerian-Eulerian model was applied, including the turbulent model (RNG k-ϵ), using the commercial package ANSYS CFX® 15 to perform all simulations. The numerical results of velocity, volume fraction and pressure of the involved phases are presented and discussed. © 2016 Trans Tech Publications.

关键词： Drops

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