载铈白云石基黏土陶催化松木气化研究  

Study on catalytic gasification of pine wood with cerium loaded dolomite based clay ceramics

作　　者：牛永红[1] 钱相儒 刘峥 李义科[1] NIU Yong-hong;QIAN Xiang-ru;LIU Zheng;LI Yi-ke(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《燃料化学学报（中英文）》2023年第3期340-347,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(52160013,51768054);内蒙古自治区高等学校青年科技英才支持计划资助(NJYT22062);内蒙古自然科学基金(2021LHMS05026);高教专项研究生教育项目(GJY2020015);内蒙古教育科学十三五规划(NGJGH2020152)资助。

摘　　要：以白云石为主要骨料,采用粉末烧结一步法制备黏土陶载体,经浸渍负载稀土Ce后煅烧,制得新型载铈白云石基(Ce-Dol)黏土陶催化剂,用于松木棒为原料的生物质催化气化实验,实验系统采用自行建设的两段式气化炉。研究不同载Ce量、不同气化温度及水蒸气流量条件下Ce-Dol黏土陶催化剂的催化气化性能,并确定最优工况。研究结果表明,白云石基黏土陶载铈后可有效提高催化活性,使气化产物中部分官能团伸缩振动峰吸光度降低,有效促进焦油的二次裂解,提高生物质气化气品质。保持其他工况不变,载Ce量为6%时,气化产物中H2体积分数最高,为32.43%;随着气化温度的升高,焦油中脂肪族羧酸、酮类化合物逐渐分解成小分子(如CO、CO_(2)等)化合物,H2整体呈上升趋势,900℃时达到最高值;气化过程中适量的水蒸气可以有效促进水煤气反应的正向进行,流量为4 mL/min时,H2体积分数为37.37%。With dolomite as the main aggregate, a clay ceramic carrier was prepared by one-step powder sintering method. After being impregnated with Ce and calcined, a Ce loaded dolomite based(Ce-Dol) clay ceramic catalyst was prepared, which was used for the catalytic gasification of pine wood. The influence of the addition amount of Ce, steam flow rate, gasification temperature and other parameters on the catalytic gasification of pine wood was investigated using a self-developed two-stage gasifier, and the optimal operating conditions were determined. The results show that the dolomite based clay ceramics loaded with cerium can effectively improve the catalytic activity,reduce the stretching vibration peak absorbance of some functional groups in the gasification products, effectively promote the secondary cracking of tar, and improve the quality of gaseous product. When catalyzed by the Ce-Dol clay ceramic containing 6% cerium, the volume fraction of H2 peaks with 32.43%. With the rise in gasification temperature, aliphatic carboxylic acids and ketones in biomass tar are gradually decomposed into small molecular compounds such as CO, CO_(2). The content of H2shows an ascending trend, and a maximum value is reached at900℃. Moreover, adding an appropriate amount of steam promotes the forward water-gas reaction, and a maximum volume fraction of H2(37.37%) is achieved at a steam flow rate of 4 mL/min.

关 键 词：生物质 催化气化 白云石 Ce-Dol黏土陶 

分 类 号：TK6[动力工程及工程热物理—生物能]