Ex-situ catalytic fast pyrolysis of biomass over HZSM-5 in a two-stage fluidized-bed/fixed-bed combination reactor

被引：86
作者：
Hu, Changsong [1 ]
Xiao, Rui [1 ]
Zhang, Huiyan [1 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Jiangsu, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2017年 / 243卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Biomass; Catalytic fast pyrolysis; HZSM-5; Ex-situ; Olefins; Fluidized bed; IN-SITU; LIGNOCELLULOSIC BIOMASS; BIO-OIL; ZEOLITE; CONVERSION; TRANSFORMATION; PARAMETERS; GC/MS;
D O I：
10.1016/j.biortech.2017.07.011
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Ex-situ and in-situ catalytic fast pyrolysis (CFP) of biomass over HZSM-5 were compared in a two-stage fluidized-bed/fixed-bed combination reactor. Ex-situ CFP gave a similar carbon yield of aromatics + olefins (similar to 20%) with in-situ CFP but produced much more olefins (10.3% vs. 5.8%) and less char + coke (42.7% vs. 48.4%). The effects of weight hourly space velocity (WHSV), carrier gas flow rate, pyrolysis temperature and catalysis temperature on product distribution in ex-situ CFP were further studied. The maximum carbon yield of aromatics + olefins (21.7%) was obtained at pyrolysis temperature of 550 degrees C and catalysis temperature of 600 degrees C with the highest carrier gas flow rate (1.2 L/min) and WHSV of 1.33 h(-1). Obviously less coke was generated at higher pyrolysis temperature. When catalysis temperature increased to 700 degrees C, ethylene and benzene carbon selectivities boosted to 79.4% and 60.5%, respectively. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1133 / 1140
页数：8
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