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Synergistic interaction of metal–acid sites for phenol hydrodeoxygenation over bifunctional Ag/TiO_2 nanocatalyst

Chinese Journal of Chemical Engineering 2019年第2期27卷 349-361页

作者： andrew ng kay.lup Faisal Abnisa Wan Mohd Ashri Wan Daud Mohamed Kheireddine Aroua Department of Chemical Engineering Faculty of Engineering University of Malaya Centre for Carbon Dioxide Capture and Utilization School of Science and Technology Sunway University Department of Engineering Lancaster University

The use of silver metal for hydrodeoxygenation(HDO) applications is scarce and different studies have indicated of its varying HDO activity. Several computational studies have reported of silver having almost zero turnover frequency for HDO owing to its high C\\O bond breaking energy barrier and low carbon and oxygen binding *** this work, titania supported silver catalysts were synthesized and firstly used to examine its phenol HDO activity via experimental reaction runs. BET, XRD, FESEM, TEM, EDX, ICP–OES, Pyridine-FTIR, NH_3-TPD and H_2-TPD analyses were done to investigate its physicochemical properties. Phenomena of hydrogen spillover and metal–acid site synergy were examined in this study. With the aid of TiO_2 reducible support, hydrogen spillover and metal–acid site interactions were observed to a certain extent but were not as superior as other Pt, Pd, Ni-based catalysts used in other HDO studies. The experimental findings showed that Ag/TiO_2 catalyst has mediocre phenol conversion but high benzene selectivity which confirms the explanation from other computational studies.

关键词： Silver based catalyst Physicochemical properties Hydrogen spillover Metal-acid sites Hydrodeoxygenation

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Nature’s fight against plastic pollution:Algae for plastic biodegradation and bioplastics production

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Environmental Science and Ecotechnology 2020年第4期4卷 47-56页

作者： Wen Yi Chia Doris Ying Ying Tang Kuan Shiong Khoo andrew ng kay.lup Kit Wayne Chew School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan43900Malaysia College of Chemistry and Chemical Engineering Xiamen UniversityXiamen361005FujianChina Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaJalan Broga43500SemenyihSelangor Darul EhsanMalaysia

The increased global demand for plastic materials has led to severe plastic waste pollution,particularly to the marine *** critical issue affects both sea life and human beings since microplastics can enter the food chain and cause several health *** recycling,chemical treatments,incineration and landfill are apparently not the optimum solutions for reducing plastic ***,this review presents two newly identified environmentally friendly approaches,plastic biodegradation and bioplastic production using algae,to solve the increased global plastic ***,particularly microalgae,can degrade the plastic materials through the toxins systems or enzymes synthesized by microalgae itself while using the plastic polymers as carbon *** algae for plastic biodegradation has been critically reviewed in this paper to demonstrate the mechanism and how microplastics affect the *** the other hand,algae-derived bioplastics have identical properties and characteristics as petroleum-based plastics,while remarkably being biodegradable in *** review provides new insights into different methods of producing algae-based bioplastics(e.g.,blending with other materials and genetic engineering),followed by the discussion on the challenges and further research direction to increase their commercial feasibility.

关键词： Algal polymers Microalgae Microplastics Polyhydroxyalkanoate(PHA) Polyhydroxybutyrate(PHB)

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