化工进展2019，Vol.38Issue(3)：1308-1315,8.DOI:10.16085/j.issn.1000-6613.2018-1170
木炭水蒸气催化气化制取合成气
Catalyst steam gasification of charcoal for syngas
摘要
Abstract
Charcoal catalytic steam gasification for syngas was investigated using a lab-scale fixed bed gasifier to study the effects of different catalysts, temperature, and steam flow rate. Four alkali salts of KOH, K2 CO3, KHCO3 and KNO3 were selected to pretreat charcoal. This paper discusses production of syngas from steam catalytic gasification of charcoal in a lab-scale ?xed bed reactor, using KOH, K2 CO3, KHCO3 and KNO3 as catalysts. The effects of different catalysts, steam flow rate and gasification temperatures on carbon conversion rate, hydrogen production rate, volume fraction of gas composition and H2/CO value of charcoal vaporization were investigated. The method of char absorbing catalyst was used to load catalyst in this work. The experiment used the absorption of potassium salt solution by carbon to load catalysts. The experimental results show that the four kinds of potassium salts can all improve the gasification efficiency of charcoal. With the same mass fraction of potassium salt solution, the catalytic activity of the four catalysts is in the order: KOH> K2 CO3> KHCO3> KNO3. In addition, the rate of carbon conversion and hydrogen yield production increased with increasing concentration of the catalyst concentration, but the increasing trend slows down gradually. With further increase the trend of high concentration increased gradually, so the mass fraction of catalyst solution was more appropriate in the 4％-6％ range. The H2 composition and the H2/CO ratio enhances with the increases of steam flow rate. The rise of temperature can promote carbon gasification reaction and the carbon conversion and hydrogen yield can reach 98.7％ and 145.23 g/kg at 950℃. The syngas of H2/CO ratio in the range of 1.53-4.09 was obtained. A promising application for biomass is liquid fuel synthesis, such as methanol or dimethyl ether (DME).关键词
木炭/催化气化/合成气/H2/CO比Key words
charcoal/catalytic-gasification/syngas/H2/CO ratio分类
能源科技引用本文复制引用
宁思云,应浩,徐卫,孙云娟,尹航,贾爽,刘光华..木炭水蒸气催化气化制取合成气[J].化工进展,2019,38(3):1308-1315,8.基金项目
国家重点研发计划(2017YFD0601206) （2017YFD0601206）
广东省引进创新创业团队项目(2016ZT06N467) （2016ZT06N467）
江苏省林业科技创新与推广项目(LYKJ[2017]47) （LYKJ[2017]47）
