中国电机工程学报Issue(17)：2808-2816,9.DOI:10.13334/j.0258-8013.pcsee.2014.17.009
基于响应面法的生物质半焦催化气化试验
Catalytic Gasification of Biomass Char Based on Response Surface Methodology
摘要
Abstract
The alkali metal catalysts with the sepiolite as support were prepared for biomass gasification. The gasification experiments of wheat straw char with steam were performed at a lower temperature (650~750℃). Based on response surface methodology, the designed experiments using 3-level experiment center composite were carried out. In order to evaluate the gasification performance of char involving the hydrogen yield, carbon conversion efficiency and reaction rate, the response surface was set up based on two catalyst preparation parameters, i.e. the K2CO3 content as well as calcination temperature. Using the regression model of the response surface, char gasification performance with the catalysts were analyzed and optimized. Results show that the char gasification performance is significantly influenced by the K2CO3 content, whereas the hydrogen yield and carbon conversion efficiency are much related to the calcination temperature. There is synergy between the K2CO3 content and calcination temperature on the hydrogen yield and carbon conversion efficiency. Further, the catalyst with a K2CO3 content of 25.8% and calcinated at a temperature of 728℃ is optimized. With the catalyst, the gasification of wheat straw char is experimentally performed at a temperature of 700℃. Results indicate that hydrogen yield of 103.67mol/kg, carbon conversion efficiency of 96.48% and reaction rate of 1.37min-1 are obtained at gasification temperature of 700℃, which is in good agreement with the model prediction. It is also found that gasification temperature has a significant effect on char conversion and the gasification reaction may be held back below the temperature of 700℃. And the results show that the sepiolite is a favorable catalyst support for biomass gasification.关键词
生物质/半焦气化/响应面法/催化剂/气化温度Key words
biomass/char gasification/response surface methodology/catalyst/gasification temperature分类
能源科技引用本文复制引用
杜玉照,肖军,沈来宏,俞元元,周亚运,吕潇..基于响应面法的生物质半焦催化气化试验[J].中国电机工程学报,2014,(17):2808-2816,9.基金项目
国家重点基础研究发展计划项目(973项目)(2010CB732206，2013CB228106)。The National Basic Research Program of China (973 Program)(2010CB732206,2013CB228106) （973项目）
