Alkali catalyzed liquefaction of corncob in supercritical ethanol–water |
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| Affiliation: | 1. Biomass Processing Lab, Center of Biofuel and Biochemical Research, Mission Oriented Research (Green Technology), Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia;2. Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan;1. Thermo-catalytic Processes Area (TPA), Bio-Fuels Division (BFD), CSIR-Indian Institute of Petroleum (IIP), Dehradun 248005, India;2. Academy of Scientific and Innovative Research (AcSIR), New Delhi, India;3. Department of Chemistry, A.S. College, Samrala Road, Khanna 141401, India;1. School of Resources, Environmental & Chemical Engineering and Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, Nanchang University, Nanchang, China;2. College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;3. Nanchang Water Industry Group Co., Ltd., Nanchang, China;1. School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, PR China;2. Key Laboratory of Clean Energy of Liaoning, College of Energy and Environment, Shenyang Aerospace University, Shenyang 110136, PR China |
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| Abstract: | Corncob liquefaction in supercritical ethanol–water was performed with and without the addition of an alkali catalyst by direct addition or biomass impregnation in a 250-cm3 batch reactor. The effects of temperature, solvent and alkali addition on the biomass conversion level and oil yield were investigated to find the optimum condition. For non-catalytic liquefaction using a 1:1 (v/v) ethanol: water ratio, a maximum oil yield and conversion level of 49.0% and 93.4%, respectively, were obtained at 340 °C. For alkali catalytic liquefaction, the oil yield with KOH addition (57.5%) was higher than that from KOH-impregnated corncob liquefaction (43.3%). The oil from liquefaction with KOH addition had higher heating value (26.7–35.3 MJ kg?1) than the corncob (19.1 MJ kg?1). The dominant components of the obtained oil were found by GC/MS analysis to be aldehyde, ester, phenol derivatives and aromatic compounds. |
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| Keywords: | Alkali Corncob Impregnation Liquefaction Ethanol–water |
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