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29th European Biomass Conference and Exhibition, EUBCE 2021

作者： Van Der Slikke, Deanne Guerra, Karla De Jong, Wiebren Pedroharo Chemical and Environmental Engineering Department Escuela Tecnica Superior de Ingeniería Universidad de Sevilla Camino de los Descubrimientos s/n Seville41092 Spain Section of Large Scale Energy Storage Department of Process and Energy Delft University of Technology Leeghwaterstraat 39 Delft2628 CB Netherlands

Hydrogen is believed to be an important energy vector in the transition to a more sustainable future. However, there is a scarcity of relevant studies analysing the realistic potential for hydrogen production in specific European regions. In this study, the potential for biomass-derived hydrogen is comprehensively analysed considering a realistic use of current biogenic residues in relevant sectors. However, not all residues can be used for the production of hydrogen and an analysis has to be made to find how much biomass is suited for hydrogen production, what amounts of hydrogen can be produced from biomass and how these amounts compare to the specific needs for renewable hydrogen in this region. This study focused on hydrogen production from agricultural residues to provide hydrogen for oil upgrading processes in petroleum refineries. The results indicate that around 92% of all agricultural residues in west-Andalusia can be used for hydrogen generation. Gasification and pyrolysis have been identified as the best candidates for the processing of the selected residues. An annual amount of 33,029 tons of biomass-based hydrogen can be used to provide 14% of the hydrogen demand for petroleum upgrading processes, thereby reducing the need natural gas in this industry. © 2021, ETA-Florence Renewable Energies. All rights reserved.

关键词： Biomass Gasification Hydrogen Integration Residues

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Automated and dynamic extrusion pressure adjustment based on real-time flow rate measurements for precise ink dispensing in 3D bioprinting

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Bioprinting 2022年 28卷

作者： Wenger, Lukas Strauß, Svenja Hubbuch, Jürgen Institute of Process Engineering in Life Sciences Section IV: Biomolecular Separation Engineering Karlsruhe Institute of Technology Fritz-Haber-Weg 2 Karlsruhe 76131 Germany Institute of Functional Interfaces Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 Eggenstein-Leopoldshafen 76344 Germany

Extrusion-based printing relying on pneumatic dispensing systems is the most widely employed tool in bioprinting. However, standardized and reliable methods for process development, monitoring and control are still not established. Suitable printing parameters are often determined in a trial-and-error approach and neither process monitoring nor real-time adjustments of extrusion pressure to environmental and process-related changes are commonly employed. The present study evaluates an approach to introduce flow rate as a main process parameter to monitor and control extrusion-based bioprinting. An experimental setup was established by integrating a liquid flow meter between the cartridge and nozzle of a pneumatically driven bioprinter to measure the actual flow of dispensed ink in real-time. The measured flow rate was fed to a Python-based software tool implementing a proportional-integral-derivative (PID) feedback loop that automatically and dynamically adapted the extrusion pressure of the bioprinter to meet a specified target flow rate. The performance of the employed experimental setup was evaluated with three different model inks in three application examples. a) Continuous dispensing: Several runs of continuous dispensing showed that the PID-based pressure control was able to generate a steady flow rate more consistently and precisely than constant pressure settings. b) Adaptation to ink inhomogeneities: Deliberately created ink inhomogeneities were successfully compensated for by real-time pressure adjustments which profoundly enhanced the printing quality compared to printing without adaptive pressure. c) process transfer to other nozzle types: Experiments with different nozzle types demonstrated the potential of the established setup to facilitate and accelerate process transfer and development. The present study provides an alternative approach for process design, monitoring and control by introducing flow rate as a main process parameter. We propose biopr

关键词： 3D printing Adaptive pressure control Bioink Bioprinting Flow regulation Hydrogels Liquid flow meter process control

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Effect of pectin-CMC-based coating on texture of hot air-dried honeydew 4

Effect of pectin-CMC-based coating on texture of hot air-dri...

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4th International Conference on Green Chemical engineering and technology: Materials Science, GCET 2019

作者： Raup, M.F. Abdul Manap, M.A. Faridatul Ain, M.R. Ibrahim, S.F. Abdul Rahman, M. Section of Food Engineering Technology Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology Melaka Alor Gajah78000 Malaysia School of Chemical and Process Engineering Faculty of Engineering and Physical Sciences University of Leeds West YorkshireLS2 9JT United Kingdom

The optimization of temperature, immersion time and coating treatment, during hot air drying of honeydew, was investigated by the response surface methodology. The results show that the coated sample with immersion time of 35 min at drying temperature 55 °C was determined as the optimum condition for this study. The honeydew was coated with pectin-CMC-based edible coating (except non-coated sample) and was then hot-air dried. The data from the chromameter for colour analysis showed that the decreasing value of ΔE as the immersion time and temperature increase and non-coated samples also shows higher value than coated samples. The results of the texture (skin strength) analysis showed that the longer immersion time resulted in lower skin strength. However, the coated samples had better structural integrity and higher moisture content, but the plasticizing effect from the coating result in the lower skin strength. Highest moisture content recorded was from coated sample with 60 min immersion time at 58 °C. Pectin-CMC-based edible coating acts as a barrier where the sample moisture was trapped;longer the immersion time and higher barrier produced. Coated sample showed lower rehydration ratio than non-coated sample. The pectin-CMC-based edible coating solutions produced a sticky layer on the surface of samples, which is solidified during air-drying and this layer can potentially reduce water absorption into the porous structure in honeydew texture. © 2020 Elsevier Ltd. All rights reserved.

关键词： Coatings

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Emulating characteristic curve of B&W photographic films using image manipulation software

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Materials Today: Proceedings 2020年 31卷 300-305页

作者： M. Salihin R. Othman MN. Mahmud INHM Amin Chemical Engineering Section Malaysian Institude of Chemical & Bio-Engineering Technology University Kuala Lumpur 78000 Malacca Malaysia Bioengineering Technology Section Malaysian Institude of Chemical & Bio-Engineering Technology University Kuala Lumpur 78000 Malacca Malaysia Process Technology Section Malaysian Institude of Chemical & Bio-Engineering Technology University Kuala Lumpur 78000 Malacca Malaysia

The aim of this research was to construct film characteristic curve using image manipulating software. Few types of chemically developed films over a range of processing time shows exceptional trend with similar trend to analog-based characteristic curves publish by film manufacturer. Typical toe & shoulder characteristic (D-Min & D-Max) can be observe in the digitally assessed curve albeit lacking of data in term of samples’ exposure ranges. Meanwhile, film contrast of each film types can be valued using this method by measuring the EV levels between peaks cause by different density of metallic silver on film negatives. Thus, characteristic curves generated via software analysis is feasible but requires further validation with the standard method to ensure its accuracy.

关键词： Exposure Latitude Zone System Silver Halide Film Photography Characteristic Curve

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Closing the LP and APC gap with real-time optimization

Closing the LP and APC gap with real-time optimization

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American Fuel and Petrochemical Manufacturers, AFPM - AFPM Operations and process technology Summit 2019: Operational Planning, Control and Automation Technologies

作者： Teague, Kenneth G. Le, Peter Process Monitoring Real-Time Manufacturing Optimization Section Fuels Process and Optimization Technology ExxonMobil Research and Engineering Company SpringTX United States AVEVA HoustonTX United States ExxonMobil Research and Engineering Company Science 2 5A.345 22777 Springwoods Village Parkway SpringTX77389 United States

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A Comparative Study of Impact Fracture Toughness of Epoxidized Poly(1, 4 Cis-Isoprene) Compatibilized PLA Binary and Ternary Blends

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Chemical engineering and technology 2025年第2期48卷

作者： Bijarimi, Mohd Ahmad, Sahrim Ode, La Mustaqeem, Mujahid Norazmi, M. Normaya, Erna Jaafar, Jamiluddin Faculty of Chemical and Process Engineering Technology Universiti Malaysia Pahang Al-Sultan Abdullah Lebuh Persiaran Tun Khalil Yaakob Pahang Kuantan26300 Malaysia School of Applied Physics Faculty of Science & Technology Universiti Kebangsaan Malaysia Selangor Bangi43600 Malaysia Department of Chemistry National Taiwan University No. 1 Section 4 Roosevelt Road Taipei10617 Taiwan Department of Chemistry Kulliyyah of Science International Islamic University Malaysia Jalan Sultan Haji Ahmad Shah Bandar Indera Mahkota Pahang Kuantan25200 Malaysia Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia Parit Raja Johor Batu Pahat86400 Malaysia

Poly(lactic acid) (PLA) is a biodegradable polymer with limited application because of its intrinsic brittleness, low toughness, and low elongation at break. Melt blends were prepared by mixing a natural rubber (NR, poly(1,4-cis-isoprene) in the form of liquid NR (LNR), liquid-epoxidized NR (LENR), and polypropylene (PP) in the PLA matrix. Four blend systems were designed and prepared, i.e., PLA–PP, PLA–PP–LNR, and PLA–LNR or PLA–LENR. The composition of PP in the blend was fixed at 10 % PLAPP (90/10). Results showed that PLA–PP mixed with LNR improved impact and elongation at break. The binary blend of PLA–LNR (90/10) significantly enhanced impact strength and elongation at break properties. In contrast, the binary blends of PLA–LENR (90/10) showed a lower value of elongation at break (9.5 % vs. 37.3%) and impact strength (4.56 kJ m−2 vs. 6.44 kJ m−2). The melting temperature (Tm) and the glass transition temperature (Tg) were measured by differential scanning calorimetry, which recorded slight changes in the glass temperatures and melting temperatures. Scanning electron microscopy images of the tensile fracture of the PLA–LNR (90/10) blend showed the presence of large fibrils associated with the ductile failure related to neat PLA. Finally, the fracture toughness (KIC) of PLA–LNR (90/10) showed an increase of 39 % over neat PLA (2.94 MPa.m1/2 vs. 4.08 MPa.m1/2). © 2024 Wiley-VCH GmbH.

关键词： Fracture toughness

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Cyclic Characteristics of the Physical Properties of Key Strata in CBM Systems Controlled by Sequence Stratigraphy—An Example from the Gujiao Block

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 444-455页

作者： WANG Gang QIN Yong XIE Yiwei WANG Ziwei WANG Boyang WANG Qi ZHANG Xiaoyang Shangqiu Normal University.Shangqiu Henan 476000China Shandong Provincial Key Laboratory of Depositional Mineralization&Sedimentary Mineral Shandong University of Science and TechnologyQingdaoShandong 266590China Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education China University of Mining and TechnologyXuzhouJiangsu 221116China Geology Section of the Xi Shan Coal Electricity Group Taiyuan 030053China Xi'an Research Institute China Coal Technology and Engineering Group CorpXi’an 710054China

Multiple coal seams and interbedded rock assemblages formed in vertical progression due to the influence of multiple stages of sea level *** on mercury injection experiment,low temperature liquid nitrogen experiment,porosity and permeability experiment and breakthrough pressure experiment,the vertical variation characteristics of coal-bearing strata in Gujiao block are explained in *** results of the mercury injection and low temperature liquid nitrogen experiments show that the pore structure characteristics fluctuate with increasing depth in the strata,with fewer micropores followed by transition *** BET specific surface area and average pore diameter of the Shanxi Formation are generally larger than those of the Taiyuan *** to the continuous cyclic sequence stratigraphy changes,the porosity,permeability,breakthrough pressure and breakthrough time of the samples show a certain *** the same sequence,the porosity is larger,and the permeability is smaller near the maximum flooding *** the permeability of the sandstone samples is higher,the porosity is lower,and the breakthrough pressure and breakthrough times are *** strata in the study area formed in an oxidized environment that was affected by freshwater,and the pore structure of different lithologies is quite *** the formation of sandstone,the intergranular pores generally underwent filling with secondary quartz,clay minerals and organic matter,resulting in low porosity and permeability.

关键词： coal-bearing strata sequences physical properties cycle Gujiao block

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Ultrafiltration performance for removal of ammoniacal nitrogen from fertilizer wastewater integrated with bio-adsorption

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AIP Conference Proceedings 2024年第1期2923卷

作者： I. N. H. M. Amin M. H. M. Nizam L. Y. Ng Section of Chemical Engineering Technology (Process) Malaysian Institute of Chemical and Bioengineering Technology UniKL MICET Alor Gajah Melaka Malaysia Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul Rahman Jalan Sungai Long Bandar Sungai Long Cheras 43000 Kajang Selangor Malaysia

Fertilizer industries are one of the most critical industries to support agriculture industries in Malaysia. A significant amount of wastewater also producing along with fertilizer production. The wastewater contains ammoniacal nitrogen, NH3−N, and causes a real treat to fish due to its toxicity. Thus, this study aims to determine the performance of ultrafiltration process removal of ammoniacal nitrogen from fertilizer wastewater incorporated with bio-adsorption process by using different feed solution chemistry and temperature. The sample was obtained from a fertilizer company located at Gurun, Kedah. The obtained sample contains NH3-N and solely used for this study only. Membrane material of polyethersulfone (PES) was used for this study. As for the bio-adsorption process, bio-adsorbent which made from banana peel was used. The removal of NH3-N was investigated at solution pH values of 10.30 and 7 for different temperature. The results showed the highest NH3−N removal was 80.07% obtained under condition of p. 10.30 and 30°C. Hence, this combined process is feasible for significantly removing NH3−N from fertilizer wastewater. Scanning electron microscope (SEM) was used for surface membrane morphology characterization. Atomic force microscope (AFM) was employed to investigate membrane surface roughness. Results of AFM indicated that membrane fouling becomes more severe when surface roughness increasing, which was measured by the surface area difference where magnitude and frequency of surface peaks were taken to accounts. Flux decline was correlated to the surface roughness.

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Preparation of n-doped biochar from palm oil mill sludge and urea for peroxydisulfate (PDS) activation: A kinetic study

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AIP Conference Proceedings 2024年第1期2923卷

作者： Sabrina Karim Aida Humaira Sallehuddin Fatimah Azzahrah Zurani Siti Shawalliah Idris Kelly Yong Tau Len Mohamad Ali Ahmad Environmental Healthcare Research Cluster Section of Environmental Healthcare Universiti Kuala Lumpur (UniKL) Institute of Medical Science Technology 43000 Kajang Selangor Malaysia Section of Environmental Engineering Technology Universiti Kuala Lumpur (UniKL) Malaysian Institute of Chemical and Bioengineering Technology 78000 Alor Gajah Melaka Malaysia School of Chemical Engineering College of Engineering Universiti Teknologi MARA 40000 Shah Alam Selangor Malaysia Green Chemistry Research Cluster Process Engineering Section Universiti Kuala Lumpur (UniKL) Malaysian Institute of Chemical and Bioengineering Technology 78000 Alor Gajah Melaka Malaysia School of Mechanical Engineering College of Engineering Universiti Teknologi MARA 40000 Shah Alam Selangor Malaysia

Transition metal-based homogeneous/heterogeneous catalysts have been identified as a viable option for persulfate activation. However, metal leaching is unavoidable, leading to significant secondary contamination. Alternatively, nitrogen-doped biochar is considered a promising persulfate activator because it is environmentally friendly and low-cost. In this study, biochar-doped with nitrogen source urea was synthesized in a single-pot pyrolysis and used to activate peroxydisulfate (PDS). The nitrogen content of synthesized POME biochar was altered by adding different ratios of urea to the precursors. The catalytic application of biochar was then considered, including the feasibility of catalytic removal of methylene blue dye. This study was conducted based on 3 ratios of urea-doped biochar: 25:75, 50:50 and 75:25. The optimum pH, dosage of urea-doped biochar and concentration of PDS were subsequently determined. Based on the experimental results, the optimum conditions were identified as pH3, 8mM PDS concentration and 0.1g 75:25 biochar: urea ratio. Based on the optimized conditions, a removal rate of 92.6±0.9% was attained. The kinetic model for this degradation was found to be well fitted to the pseudo first-order reaction. This research provides an effective method for enhancing the N functionality of sludge-based carbocatalysts, as well for sludge recovery and reuse.

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Mixed iridium-nickel oxides supported on antimony-doped tin oxide as highly efficient and stable acidic oxygen evolution catalysts

材料展望（英文）

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材料展望（英文） 2024年第1期3卷 165-180页

作者： Jonathan Ruiz Esquius Alec P LaGrow Haiyan Jin Zhipeng Yu Ana Araujo Rita Marques Adélio Mendes Lifeng Liu Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre Jose VeigaBraga 4715-330Portugal Carbon Science and Technology Institute INCAR-CSICFrancisco Pintado Fe 26Oviedo 33011Spain Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre Jose VeigaBraga 4715-330Portugal Scientific Imaging Section Okinawa Institute of Science and Technology Graduate UniversityKunigami-gunOkinawa 904-0412Japan Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre Jose VeigaBraga 4715-330Portugal Clean Energy Cluster International Iberian Nanotechnology LaboratoryAv.Mestre Jose VeigaBraga 4715-330Portugal Songshan Lake Materials Laboratory Dongguan 523808People's Republic of China Laboratory for Process Engineering EnvironmentBiotechnology and EnergyFaculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal Associate Laboratory in Chemical Engineering Faculty of EngineeringUniversity of PortoRua Dr Roberto FriasPorto 4200-465Portugal

Proton exchange membrane(PEM)water electrolysis represents a promising technology for green hydrogen production,but its widespread deployment is greatly hindered by the indispensable usage of platinum group metal catalysts,especially iridium(Ir)based materials for the energy-demanding oxygen evolution reaction(OER).Herein,we report a new sequential precipitation approach to the synthesis of mixed Ir-nickel(Ni)oxy-hydroxide supported on antimony-doped tin oxide(ATO)nanoparticles(IrNiyOx/ATO,20 wt.％(Ir+Ni),y=0,1,2,and 3),aiming to reduce the utilisation of scarce and precious Ir while maintaining its good acidic OER *** tested in strongly acidic electrolyte(0.1 M HClO4),the optimised IrNi1Ox/ATO shows a mass activity of 1.0 mA μgIr-1 and a large turnover frequency of 123 s-1 at an overpotential of 350 mV,as well as a comparatively small Tafel slope of 50 mV dec-1,better than the IrOx/ATO control,particularly with a markedly reduced Ir loading of only 19.7 μgIr ***,IrNi1Ox/ATO also exhibits substantially better catalytic stability than other reference catalysts,able to continuously catalyse acidic OER at 10 mA cm-2 for 15 h without obvious *** in-situ synchrotron-based x-ray absorption spectroscopy confirmed that the Ir3+/Ir4+species are the active sites for the acidic ***,the performance of IrNi1Ox/ATO was also preliminarily evaluated in a membrane electrode assembly,which shows better activity and stability than other reference *** IrNi1Ox/ATO reported in this work is a promising alternative to commercial IrO2 based catalysts for PEM electrolysis.

关键词： mixed oxides oxygen evolution reaction polymer electrolyte membrane antimony doped tin oxide membrane electrode assembly

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