Comparison of non-catalytic and catalytic fast pyrolysis of corncob in a fluidized bed reactor.
Comparison of non-catalytic and catalytic fast pyrolysis of corncob in a fluidized bed reactor.
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DOI：
10.1016/j.biortech.2008.08.031
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发表时间：
2009-02
影响因子：
11.4
通讯作者：
Huiyan Zhang;R. Xiao;He Huang;Gang Xiao
中科院分区：
文献类型：
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作者：
Huiyan Zhang;R. Xiao;He Huang;Gang Xiao
在沸腾床上考察了玉米芯在有催化剂和无催化剂条件下的快速热解，考察了热解参数(温度、气体流量、静态床层高度和颗粒大小)和HZSM-5沸石催化剂对产品收率和液体产品质量的影响。结果表明，裂解温度为550℃，气体流量为3.4L/min，静态床层高度为10 cm，颗粒尺寸为1.0~2.0 mm时，液体产率为56.8%。催化剂的存在增加了不凝性气体、水和焦炭的产率，而降低了液体和焦炭的产率。元素分析表明，使用HZSM-5催化剂的第二冷凝器中的收集液氧含量比不使用催化剂时降低了25%以上。该催化剂收集液油的H/C摩尔比为1.511，O/C摩尔比为0.149，高热值为34.6MJ/kg。结果表明，二冷凝器收集的液体质量较好，可作为输油用。
Fast pyrolysis of corncob with and without catalyst was investigated in a fluidized bed to determine the effects of pyrolysis parameters (temperature, gas flow rate, static bed height and particle size) and a HZSM-5 zeolite catalyst on the product yields and the qualities of the liquid products. The result showed that the optimal conditions for liquid yield (56.8%) were a pyrolysis temperature of 550°C, gas flow rate of 3.4L/min, static bed height of 10cm and particle size of 1.0–2.0mm. The presence of the catalyst increased the yields of non-condensable gas, water and coke, while decreased the liquid and char yields. The elemental analysis showed that more than 25% decrease in oxygen content of the collected liquid in the second condenser with HZSM-5 was observed compared with that without catalyst. The H/C, O/C molar ratios and the higher heating value of the oil fraction in the collected liquid with the catalyst were 1.511, 0.149 and 34.6 MJ/kg, respectively. It was indicated that the collected liquid in the second condenser had high qualities and might be used as transport oil.