燃料化学学报2017，Vol.45Issue(8)：908-915,8.
褐煤热解过程中半焦重整催化剂性质的变化
Changes in char properties after catalytic reforming volatiles from pyrolysis of brown coal
摘要
Abstract
To decrease tar yield and thus improving gasification efficiency,tar from pyrolysis of Shengli brown coal was catalytically reformed in situ in a two-stage quartz reactor using char (as catalyst) prepared from the pyrolysis of same coal.The properties of char catalysts before and after reactions were analyzed and compared.The results show that the mass of char generally decreases after the reforming reactions,which means that char is a kind of consumptive catalyst.The maximum reduction in specific surface area after reactions is from 422 to 231.8 m2/g.Results from Raman spectroscopy show that the O-containing functional groups,as well as the ratio of small aromatic rings (3-5 aromatic rings) to big aromatic rings (more than 5 aromatic rings) in char,decrease after the reactions.Besides,it appears that during the interaction between char and volatile,char from fast-heating pyrolysis mainly cracks the volatiles into small-molecule gases,while char from slow-heating pyrolysis removes the volatiles by coking on its surface.关键词
褐煤/热解/半焦/挥发分/催化重整Key words
brown coal/pyrolysis/char/volatile/catalytic reforming分类
化学化工引用本文复制引用
陈宗定,王永刚,许德平,许修强..褐煤热解过程中半焦重整催化剂性质的变化[J].燃料化学学报,2017,45(8):908-915,8.基金项目
The project was supported by the 12th Five-Year Plan of National Science and Technology Support (2012BAA04B02).“十二五”国家科技支撑计划重点项目(2012BAA04B02)资助 （2012BAA04B02）
