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Study on catalytic gasification of pine wood with cerium loaded dolomite based clay ceramics
Journal of Fuel Chemistry and Technology Pub Date : 2023-03-13 , DOI: 10.1016/s1872-5813(22)60066-5
Yong-hong NIU , Xiang-ru QIAN , Zheng LIU , Yi-ke LI

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, CO2. The content of H2 shows an ascending trend, and a maximum value is reached at 900 °C. 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.



中文翻译:

载铈白云石基粘土陶瓷催化气化松木的研究

以白云石为主要骨料,采用一步法粉末烧结法制备了粘土陶瓷载体。经Ce浸渍和煅烧后,制备了载Ce的白云石基(Ce-Dol)粘土陶瓷催化剂,用于松木催化气化。利用自主研制的二级气化炉考察了Ce的添加量、蒸汽流量、气化温度等参数对松木催化气化的影响,确定了最佳操作条件。结果表明,负载铈的白云石基粘土陶瓷可有效提高催化活性,降低气化产物中部分官能团的伸缩振动峰吸收,有效促进焦油二次裂解,并提高气态产品的质量。在含铈6%的Ce-Dol粘土陶瓷催化下,H的体积分数2个峰,32.43%。随着气化温度的升高,生物质焦油中的脂肪族羧酸和酮类物质逐渐分解为CO、CO 2等小分子化合物。H 2的含量呈上升趋势,在900℃时达到最大值。此外,加入适量的蒸汽促进了正向水煤气反应,在4 mL/min的蒸汽流速下获得了最大体积分数的H 2 (37.37%)。

更新日期:2023-03-13
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