Jo improve the yield and quality of tar, in this study, the integrated process of coal pyrolysis with simulated coal gas reforming over Ni/Al_2O_3 (CP-SCGR) was put forward. The results show that the tar yield of pyrolysis in simulated coal gas (CP-SCG) is significantly higher than that in N_2 at the same temperature, however, the integrated process CP-SCGR can further improve the tar yield, which is attributed to the radicals, like •H and •CH_X, generated from the reforming of SCG over Ni/Al_2O_3 catalyst. These small molecular radicals combine with coal pyrolysis radicals to retard the polymerization reaction among large radicals from coal cracking. Increasing the contents of CH_4 and CO_2 and catalyst loading will influence the distribution of pyrolysis products. When CH_4/CO_2/H_2/CO/N_2 composition is 4/4/2/1/1, the highest yield of pyrolysis tar is obtained. Simulated distillation and GC/MS analysis showed that the pitch content of the integrated process was reduced and the light tar content was improved, such as benzenes and phenols.
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