Abstract：Catalytic hydropyrolysis of several heavy aromatic hydrocarbon feedstocks was investigated over PtM/ZSM-5 catalyst in a fixed-bed reactor. When cracking C9 used as feedstock, the non-aromatics contents had significant influence on catalytic hydropyrolysis reaction behavior and product distribution. The results showed that the reaction using cracking C9 as feedstock had higher reaction temperature rise and more generation of methane, due to the strong exothermic hydrocracking of non-aromatics. While reformate C9 had lower non-aromatics content, the reaction was rather mild and temperature rise was smaller. The catalyst exhibited a good performance in the catalytic hydropyrolysis of reformate C9, which had a high yield of xylene and lower methane generation, while the remainder C9 fraction could enrich trimethylbenzene. Mixed feedstock of cracking C9 and reformate C9 could lower the reaction temperature rise and suppress methane generation.
