Trimetallic Au-Cu-La/AC for Acetylene Hydrochlorination in a Multi-Tubular Fixed Bed Reactor

• Main Authors: Lei Wang, Benxian Shen, Jigang Zhao, Chunlei Wu, Xiaotao Bi
• Format: Article
• Language: English
• Published: Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR 2020-02-01
• Series: Iranian Journal of Chemistry & Chemical Engineering
• Subjects: mercury-free catalyst; acetylene hydrochlorination; la; gold; multi-tubular fixed bed reactor
• Online Access: http://www.ijcce.ac.ir/article_36135_4e8e407538ef6f4fbe0cf749a16f7d1c.pdf

The metal chloride of LaCl3 was chosen to modify the Au-Cu/AC to decrease the noble metal of gold and enhance the catalytic performances. Then a mercury-free catalyst of Au-Cu-La/AC was prepared by the impregnation method, and the fresh Au-Cu-La/AC and Au-Cu/AC catalysts were also characterized in comparison. The catalytic performances of mercury-free catalysts for acetylene hydrochlorination were carried out for 3500 hours in a multi-tubular fixed bed reactor. The additives of La can make the active species dispersed well and retard the aggregation of particles. And the acetylene conversion rate remained stable over 98.5% with the fluctuations, less than 1%, and the selectivity of vinyl chloride maintained the stability of 99% or higher, which indicated that the mercury-free catalyst has excellent catalytic performances for acetylene hydrochlorination.