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Catalytic fast pyrolysis of biomass: Selective deoxygenation to balance the quality and yield of bio-oil. 2019

Xu Chen, and Yingquan Chen, and Haiping Yang, and Xianhua Wang, and Qingfeng Che, and Wei Chen, and Hanping Chen
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, 430074 Wuhan, PR China.

Firstly, the operating conditions were screened for biomass pyrolysis in a fixed bed with respect to higher oil yield. A temperature of 600 °C with an N2 flow of 80 ml/min exhibited the highest bio-oil yield. Then, the catalytic pyrolysis of biomass with various catalysts (Al2O3, CaO, MgO, CuO, Fe2O3, NiO, ZnO, ZrO2, TiO2, HZSM-5 and MCM-41) was studied to identify the selective deoxygenation method with respect to improve bio-oil quality with smaller drop in bio-oil yield. With the addition of CaO, the oxygen was mainly removed in the form of CO2, while, in other cases, more oxygen was removed in the form of H2O. Furthermore, more decarboxylation or less dehydration is better for the balance between yield and deoxygenation amount, and the preferred decarboxylation would lead to a higher pH and lower moisture content of bio-oil.

UI MeSH Term Description Entries
D010084 Oxidation-Reduction A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471). Redox,Oxidation Reduction
D010100 Oxygen An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration. Dioxygen,Oxygen-16,Oxygen 16
D010938 Plant Oils Oils derived from plants or plant products. Oils, Plant,Oils, Vegetable,Plant Oil,Vegetable Oil,Vegetable Oils,Oil, Plant,Oil, Vegetable
D006358 Hot Temperature Presence of warmth or heat or a temperature notably higher than an accustomed norm. Heat,Hot Temperatures,Temperature, Hot,Temperatures, Hot
D000077319 Pyrolysis High temperature decomposition without addition of extra air or oxygen. It yields syngas, bio-oil and bio-char. Pyrolyses
D055162 Biocatalysis The facilitation of biochemical reactions with the aid of naturally occurring catalysts such as ENZYMES.
D059808 Polyphenols A large class of organic compounds having more than one PHENOL group. Polyphenol,Provinols
D018533 Biomass Total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop. Biomasses

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