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RISS 인기검색어
- 검색키워드
- 저자 : Faisal Abnisa (검색결과 3 건)
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Andrew Ng Kay Lup,Faisal Abnisa,Wan Mohd Ashri Wan Daud,Mohamed Kheireddine Aroua 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.56 No.-
Catalytic deoxygenation is a fundamental process for bio-oil upgrading due to its high oxygen contentwhich will result in lower heating value, corrosion and instability issues. The discovery of an excellentheterogeneous deoxygenation metal catalyst with high deoxygenation activity is a necessarybreakthrough for an optimized bio-oil catalytic deoxygenation. For an effective deoxygenation supportedmetal catalyst, properties such as high H2 sticking coefficient, optimal metal-oxygen bond strength andsuitable acid strength from support are needed to ensure facile scission of C O bonds and activation ofH2 and O-containing compounds. Metals such as Fe, Ru, Sn, W, Zr and supports such as C, TiO2, ZrO2 whichare oxophilic were also observed to enhance direct removal of oxygen from O-containing compounds dueto their high C O and C¼O bond affinities. The choice of support is important to ensure it has optimalphysicochemical properties for facile deoxygenation and the optimal acid strength to enhance C Ohydrogenolysis activity while minimizing coke formation. The choice of metal is dependent on the type ofmodel compound since different metals catalyze different reaction pathways of the deoxygenation ofmodel compounds. This review presents on the use of heterogeneous metal catalysts in thedeoxygenation of bio-oil model compounds through several perspectives which are catalytic properties,reaction conditions, deactivation and regeneration of metal catalysts. In addition, several outlooks on thefeasible range of reaction condition for catalytic deoxygenation and criteria of excellent deoxygenationsupported metal catalysts were also expressed in this article based on the studies on the literatures.
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Khan Muhammad Qureshi,Andrew Ng Kay Lup,Saima Khan,Faisal Abnisa,Wan Mohd Ashri Wan Daud 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.9
A series of experiments was conducted to study the effect of temperature and feed rate on physicochemical properties and yield of bio-oil. The experiments were performed in a helical screw fluidized bed reactor and about 150-gram palm shell (PS) was pyrolyzed in each run at 275 oC/min heating rate. The first set of experiments was conducted at temperature ranging from 400 to 650 oC without using any inert gas for fluidization. While the second set of experiments were performed at feed rates ranging from 3 to 25 g/min in order to investigate the effects of feed rate on pyrolytic products. Results showed that the bio-oil yield was increased with the increase in temperature and feed rate due to the enhanced biomass volatilization. In a similar vein to this, a greater extent in oxygenates cracking was also noted in the bio-oil. A maximum liquid yield of about 72.84 wt% was obtained at 500 oC, while 72.92 wt% liquid yield was obtained with 25 g/min feed rate. The HHV of bio-oil was also increased from 38.52 to 43.13 MJ/kg when pyrolysis temperature was increased from 400 to 650 oC.
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Harvesting Electricity from CO2 Emission: Opportunities, Challenges and Future Prospects
Peter Adeniyi Alaba,Shaukat Ali Mazari,Hamisu Umar Farouk,Samuel Eshorame Sanni,Oluranti Agboola,Ching Shya Lee,Faisal Abnisa,Mohamed Kheireddine Aroua,Wan Mohd Ashri Wan Daud 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.8 No.3
The ever-increasing CO2 emission has necessitated the search for suitable technologies for CO2 utilization at a low cost. Recently, a novel concept called reactive gas electrosorption (RGE) for energy harvesting from CO2 emission, which could boost the efficiency of a thermal power plant by 5% was proposed by Hamelers and coworkers. The concept involves mixing of air stream with a low CO2 concentration with a stream of high CO2 concentration in an alkaline aqueous electrolyte. However, this concept is faced with the challenges of designs specific for CO2-electrolyte, and inadequate performance of the electrode materials. Therefore, this study showcases electricity generation opportunities from CO2 via RGE and discussed challenges and prospect. The study reveals that the drawback relating to the electrode could be solved using heteroatom doped traditional carbon materials and composite carbon-based materials, which has been successfully used in capacitive cells designed for desalination. This modification helps to improve the hydrophilicity, thereby improving electrode wettability, and suppressing faradaic reaction and co-ion repulsion effect. This improvement could enhance the charge efficiency, sorption capacity durability of electrodes and reduce the energy loss in RGE. Moreover, intensification of the membrane capacitive deionization (MCDI) process to obtain variances like enhanced MCDI and Faradaic MCDI. Hybrid capacitive deionization (HCDI) is also a promising approach for improvement of the capacitive cell design in RGE. This intensification can improve the electrosorption capacity and minimize the negative effect of faradaic reaction. The use of alternative amine like Piperazine, which is less susceptible to degradation to boosting CO2 dissolution is also suggested.
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