School of Chemical and Environmental Engineering, China University of Mining and Technology (Beiing)

为开发廉价环保焦油重整催化剂,以褐煤为原料制备半焦炭作为催化剂,在二阶石英反应器中对胜利褐煤热解产生的焦油进行原位催化重整研究。通过气相色谱-质谱联用(GC-MS)对焦油组分进行了定性和定量分析,利用X-射线衍射(XRD)及扫描电镜-能谱分析(SEM-EDS)等技术对活化和未活化半焦进行分析比较。结果表明:焦油产率随温度升高而呈下降趋势,高温利于焦油中重组分裂解及轻组分生成;半焦对焦油具有较好的催化重整效果,相对未活化半焦,经水蒸气活化后半焦具有更加丰富的孔隙结构,比表面积和表面金属含量(如Fe、Ca等)更高,催化重整效果更加明显;增加活化半焦炭的用量使得焦油产率正比例下降,而增加未活化半焦的用量基本没有影响。

In order to develop economic and environmental- friendly catalysts for tar reforming, taking char prepared with brown coal as catalysts, the in- situ cataly tic reforming of coal tar from pyrolysis of Sheingli Lignite was studied in a two- stage fluidized- bed quartz reactor. Qualitative and quantitative analysis of the compone nts in tars were made by gas chromatography- mass spectrometry ( GC- MS)，while the property of chars was determined by X- ray diffraction ( XRD)，scanning electr on microscopy ( SEM) and energy dispersive spectrometer ( EDS) . The results showed that the yield of tar decreased with increasing temperature and high temperatur e could promote the cracking of heavy components forming of light components in tar. Both activated and inactivated chars were effective for the reforming of pyrolytic t ars. Compared to inactivated char, the char activated by steam had more abundant pore structures, the higher specific area and more metallic species ( such as Fe and Ca) on surfaces, thus showing better catalytic activity for tar reforming. Besides, with dosage increasement of activated char had caused the reduction in tar yield propo rtionally while with dosage increasement of inactivated char had lttle effect on the yield of tar.

“十二五”国家科技支撑计划资助项目(2012BAA04B02)；