一种煤直接液化复合催化剂的研究

STUDY ON COMPOSITE CATALYST OF DIRECT COAL LIQUEFACTION

研制了一种复合催化剂,考察了催化剂对神东煤直接液化的催化活性,主要考察了催化剂粒度等因素对直接液化反应的影响,并与煤炭科学研究总院自主研发的"863"催化剂进行对比.研究结果表明,随着复合催化剂粒径变小,煤液化的转化率和油产率增加;中间产物沥青烯和前沥青烯组分产率基本不变,气产率和氢耗率降低.与"863"铁基催化剂相比,小于74μm的复合催化剂的催化效果要优于后者.该催化剂中含有一定的镍,镍的强加氢作用使得煤液化反应转化率增加,油产率增加.

A kind of composite catalyst of direct coal liquefaction has been prepared as the catalyst of Shendong coal.The affect of particle size of the catalyst on direct liquefaction has been carried out.Conversion and oil yield increased with the decreasing of the diameter of the composite catalyst,meanwhile the intermediate asphaltenes and preasphaltenes remain unchanged,and the gas yield and hydrogen consumption decreased.After the catalysts are grinded into less than 74 μm,the yields of the composite catalyst are superior to those of ＂863＂ catalyst.The products get much lighter,and the conversion increases,which show the high hydrogenation of the nickel in the composite catalyst.