Preparation of Nitrogen‐Doped Carbon Materials Based on Chitosan for Acetylene Hydrochlorination

Abstract In this study, we used a simple strategy of directly calcinating chitosan to prepare nitrogen‐doped carbon catalysts for acetylene hydrochlorination. The total content of nitrogen in Chi800 catalyst is 5.88 %, including pyridinic nitrogen, pyrrolic nitrogen, and graphitic nitrogen. The acetylene conversion of Chi800 at 220 °C can reach 91 % due to the existence of the pyridinic nitrogen and pyrrolic nitrogen active sites. In order to improve the stability of catalysts prepared from chitosan, ZnCl 2 is used to expand pores of chitosan to prepare Chi800‐E. The specific surface area of the catalyst Chi800‐E with expanded pores can reach 1299.08 m 2 g −1 . The Chi800‐E shows the acetylene conversion of 94 % and good stability up to 60 hours in a test at 220 °C.