Abstract： The effect of oxygen and nitrogen doping on the acetylene hydrochlorination was investigated by introducing the oxygen atom and nitrogen atom on the surface of the low-cost columnar coal based activated carbon by the method of impregnation of nitric acid or urea followed by calcinations. The results showed that the surface acid groups of activated carbon increased greatly after nitric acid modification, the conversion and stability decreased significantly. The method of urea modification could successfully incorporate nitrogen into the surface of activated carbon. The nitrogen doping amount increased with the decrease of calcination temperature, and the activity of acetylene hydrochlorination increased with the increase of nitrogen content. Compared with the unmodified activated carbon, the conversion of acetylene on nitrogen doped carbon was up to 70% from 55% with lower deactivation rate.
Wang Yan,Qiu Yiyang,Li Zihang et al. Urea Modification of Columnar Coal Based Activated Carbon and Its Acetylene Hydrochlorination Performance[J]. 化学反应工程与工艺, 2017, 33(4): 298-304.
