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Production of Mixed Alcohols from Bio-syngas over Mo-based Catalyst
Song-bai Qiu,Wei-wei Huang,Yong Xu,Lu Liu,Quan-xin Li*
Author NameAffiliationE-mail
Song-bai Qiu Department of Chemical Physics, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China  
Wei-wei Huang Department of Chemical Physics, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China  
Yong Xu Department of Chemical Physics, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China  
Lu Liu Department of Chemical Physics, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China  
Quan-xin Li* Department of Chemical Physics, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China liqx@ustc.edu.cn 
Abstract:
A series of Mo-based catalysts prepared by sol-gel method using citric acid as complexant were successfully applied in the high effcient production of mixed alcohols from bio-syngas, derived from the biomass gasification. The Cu1Co1Fe1Mo1Zn0.5-6%K catalyst exhibited a higher activity on the space-time yield of mixed alcohols, compared with the other Mo-based catalysts. The carbon conversion significantly increases with rising temperature below 340 oC, but the alcohol selectivity has an opposite trend. The maximum mixed alcohols yield derived from biomass gasification is 494.8 g/(kgcatal·h) with the C2+ (C2-C6 higher alcohols) alcohols of 80.4% under the tested conditions. The alcohol distributions are con-sistent with the Schulz-Flory plots, except methanol. In the alcohols products, the C2+ alcohols (higher alcohols) dominate with a weight ratio of 70%-85%. The Mo-based cata-lysts have been characterized by X-ray diffraction and N2 adsorption/desorption. The clean bio-fules of mixed alcohols derived from bio-syngas with higher octane values could be used as transportation fuels or petrol additives.
Key words:  Biomass, Bio-syngas, Mixed alcohol, Mo-based catalyst
FundProject:
利用生物质合成气在钼基催化剂上制备混合醇
仇松柏,黄伟伟,徐勇,刘璐,李全新*
摘要:
采用柠檬酸作络合剂的溶胶凝胶法制备了一系列的钼基催化剂,并应用到从生物质气化合成气有效合成低碳混合醇的实际过程中. 在钼基催化剂中,Cu1Co1Fe1Mo1Zn0.5-6%K催化剂具有相对较高的混合醇时空产率. 通过实验发现, 反应温度在340 oC以下时,碳转化率随着反应温度的增加而不断上升,总醇的选择性却逐渐下降. 在试验测试的条件内,从生物质气化合成气合成的混合醇最大产率为494.8 g/(kgcatal·h),其中C2+醇(C2-C6高碳醇)占总醇含量的80.4%. 在不同的钼基催化剂上合成的混合醇,其醇分布除甲醇以外均符合Schulz-Flory方程. 在醇类产物中,C2以上的高级醇含量占总醇重量的百分比为70%-85%. 同时,利用X射线衍射和BET等表征手段对钼基催化剂的形态和结构进行了表征. 从生物质合成气生产的洁净生物质燃料混合醇具有较高的辛烷值,可以用作运输燃料或汽油的添加剂.
关键词:  生物质,生物质合成气,混合醇,钼基催化剂
DOI:10.1088/1674-0068/24/01/77-84
分类号: