Application of SnOx/AC catalyst for the acetylene hydrochlorination

In this work, SnOx/activated carbon (AC) was synthesized by hydrothermal method, which was applied to acetylene hydrochlorination. Characterizations showed the SnO, nanoparlicles were uniformly dispersed on the carbon, with the coexistence of SnO and SnO2. The acetylene conversion of SnOx/AC was 75%, much higher than that of SnCI4/AC. It was shown that the adsorption of reactants on SnOx was stronger than on SnC14. Theoretical calculations showed the adsorption energies of reactants on SnOx were thermodynamically favorable and suggested that Sn and Sn in SnO, have different adsorption capacities for reactants. Through adjusting the valence ratio of SnOx, SnOx/AC 0 4 h (0 for oxidation) exhibited the best catalytic performance and had the strongest adsorption capacity for the reactants. However, the SnOx/AC catalyst was easily deactivated during acetylene hydrochlorination due to the loss of Sn. The doping of N effectively reduced the loss of Sn and improved the stability of the catalyst due to the anchoring effect of N on the SnOx particles.

Automated summary

SnOx/activated carbon (AC) was synthesized by hydrothermal method and used for acetylene hydrochlorination. The SnOx/AC catalyst exhibited a higher acetylene conversion compared to the SnCI4/AC catalyst. The adsorption of reactants on SnOx was stronger than on SnC14, and the adsorption capacities of Sn and SnO in SnOx for reactants were different. By adjusting the valence ratio of SnOx, SnOx/AC 0 4 h demonstrated the best catalytic performance and adsorption capacity. However, the SnOx/AC catalyst was easily deactivated during acetylene hydrochlorination, and the doping of N effectively reduced the loss of Sn and improved the stability of the catalyst.