生物质的催化快速热解：选择性脱氧以平衡生物油的质量和产率。
Catalytic fast pyrolysis of biomass: Selective deoxygenation to balance the quality and yield of bio-oil.
机构信息
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, 430074 Wuhan, PR China.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 1037 Luoyu Road, 430074 Wuhan, PR China.
出版信息
Bioresour Technol. 2019 Feb;273:153-158. doi: 10.1016/j.biortech.2018.11.008. Epub 2018 Nov 5.
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 N flow of 80 ml/min exhibited the highest bio-oil yield. Then, the catalytic pyrolysis of biomass with various catalysts (AlO, CaO, MgO, CuO, FeO, NiO, ZnO, ZrO, TiO, 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 CO, while, in other cases, more oxygen was removed in the form of HO. 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.
首先，在固定床上对生物质热解的操作条件进行了筛选，以期获得更高的产油量。在 N 流量为 80ml/min、温度为 600°C 的条件下，生物油产率最高。然后，研究了各种催化剂（AlO、CaO、MgO、CuO、FeO、NiO、ZnO、ZrO、TiO、HZSM-5 和 MCM-41）对生物质的催化热解，以确定选择性脱氧方法，提高生物油的质量，同时降低生物油产率。加入 CaO 后，氧主要以 CO 的形式去除，而在其他情况下，氧则更多地以 HO 的形式去除。此外，对于产率和脱氧量之间的平衡，更多的脱羧或更少的脱水更好，而优先脱羧则会导致生物油的 pH 值更高、水分含量更低。
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