Sn(II)/PN@AC catalysts: synthesis, physical-chemical characterization, and applications.

In this study, the novel tin-based catalysts (Sn(II)/PN@AC) were prepared using the phosphorus and nitrogen dual-modified activated carbon as support and SnCl as active compounds, as well as then evaluated in acetylene hydrochlorination. Under the reaction temperature of 180 °C and an acetylene gas hourly space velocity (GHSV-CH) of 30 h, the 15%Sn(II)/PN@AC-550 showed the initial acetylene conversion of 100% and vinyl chloride selectivity over 98.5%.

Acetylene hydrochlorination over tin nitrogen based catalysts: effect of nitrogen carbon-dots as nitrogen precursor.

The catalysts comprising the main active compounds of Sn-Nx were synthesized using trichlorophenylstannane ((CH)ClSn), nitrogen carbon-dots (NCDs), and activated carbon (AC) as starting materials, and the activity and stability of catalysts was evaluated in the acetylene hydrochlorination. According to the results on the physical and chemical properties of catalysts (TEM, XRD, BET, XPS and TG), it is concluded that NCDs@AC can increase (CH)ClSn dispersity, retard the coke deposition of (CH)ClSn/AC and lessen the loss of (CH)ClSn, thereby further promoting the stability of (CH)ClSn/AC. Based on the characterization results of CH-TPD and HCl adsorption experiments, we proposed that the existence of Sn-N can effectively strengthen the reactants adsorption of catalysts.

Tin-sulfur based catalysts for acetylene hydrochlorination.

In the present work, tin-sulfur based catalysts were prepared using NaSO and (CHSO)Sn and were tested in acetylene hydrochlorination. Based on the analysis of experiments results, the acetylene conversion of (CHSO)Sn/S@AC is still over 90%after a 50 h reaction, at the reaction conditions of T = 200 C, V/V = 1.1:1.