In this work,SnO_(x)/activated carbon(AC)was synthesized by hydrothermal method,which was applied to acetylene hydrochlorination.Characterizations showed the SnO_(x)nanoparticles were uniformly dispersed on the carbon...In this work,SnO_(x)/activated carbon(AC)was synthesized by hydrothermal method,which was applied to acetylene hydrochlorination.Characterizations showed the SnO_(x)nanoparticles were uniformly dispersed on the carbon,with the coexistence of SnO and SnO_(2).The acetylene conversion of SnO_(x)/AC was 75%,much higher than that of SnCl_(4)/AC.It was shown that the adsorption of reactants on SnO_(x)was stronger than on SnCl_(4).Theoretical calculations showed the adsorption energies of reactants on SnO_(x)were thermodynamically favorable and suggested that Sn^(4+)and Sn^(2+)in SnO_(x)have different adsorption capacities for reactants.Through adjusting the valence ratio of SnO_(x),SnO_(x)/AC O 4 h(O for oxidation)exhibited the best catalytic performance and had the strongest adsorption capacity for the reactants.However,the SnO_(x)/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 SnO_(x)particles.展开更多
基金the Taishan Scholars Program of Shandong Province(No.tsqn202103051)the Science and Technology Project of Xinjiang Bingtuan Supported by Central Government(No.2022BC001)the project of scientific research in Shihezi University(No.CXFZ202205).
文摘In this work,SnO_(x)/activated carbon(AC)was synthesized by hydrothermal method,which was applied to acetylene hydrochlorination.Characterizations showed the SnO_(x)nanoparticles were uniformly dispersed on the carbon,with the coexistence of SnO and SnO_(2).The acetylene conversion of SnO_(x)/AC was 75%,much higher than that of SnCl_(4)/AC.It was shown that the adsorption of reactants on SnO_(x)was stronger than on SnCl_(4).Theoretical calculations showed the adsorption energies of reactants on SnO_(x)were thermodynamically favorable and suggested that Sn^(4+)and Sn^(2+)in SnO_(x)have different adsorption capacities for reactants.Through adjusting the valence ratio of SnO_(x),SnO_(x)/AC O 4 h(O for oxidation)exhibited the best catalytic performance and had the strongest adsorption capacity for the reactants.However,the SnO_(x)/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 SnO_(x)particles.
