Hydrorefining of crude naphthalene under low hydrogen pressure

Hydrorefining of crude naphthalene was studied by using continuous flow reactor. The hydrogen pressure was varied in the range of 0.5-1.2MPa, CoMo catalysts with large surface area showed higher HDS and HDN activities. Catalyst deactivation was caused by the accumulation of carbonaceous material in the catalyst pore. The HDN mechanism of quinoline in crude naphthalene was also investigated. Under the investigated condition, quinoline was found to be denitrogenated mainly through o-propylaniline.