A novel catalyst based on g-C3N4/activated carbon was prepared by adding CuCl2. The catalytic performance of the as-prepared catalyst was investigated in the acetylene hydrochlorination reaction. X-ray photoelectron spectroscopy, temperature programmed desorption, low temperature N2 adsorption/desorption (Brunauer–Emmett–Teller), and thermal gravity analysis showed that Cu-g-C3N4/AC significant...

A detailed study of the valence state and distribution of the AuCl3/AC catalyst during the acetylene hydrochlorination deactivation process is described and discussed. Temperature-programmed reduction and X-ray photoelectron spectral analysis indicate that the active Au(3+) reduction to metallic Au(0) is one reason for the deactivation of AuCl3/AC catalyst. Transmission electron microscopy char...

There remains considerable debate over the active form of gold under operating conditions of a recently validated gold catalyst for acetylene hydrochlorination. We have performed an in situ x-ray absorption fine structure study of gold/carbon (Au/C) catalysts under acetylene hydrochlorination reaction conditions and show that highly active catalysts comprise single-site cationic Au entities who...

Recently, many scientists have focused on the development of green industrial technology. However, the process of synthesizing vinyl chloride faces the problem of Hg pollution. Via a novel approach, we used two elements Mo and Ti to prepare an inexpensive and green binary transition metal nitride (BTMN) as the active ingredient in a catalyst with nano-sized particles and an excellent degree of ...

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 characteri...

A systematic study of the kinetics supported-ionic-liquid-phase (SILP) Au catalysis (Au-IL/AC) has been established in continuous gas-phase hydrochlorination acetylene. We reveal that effect ionic liquid (IL) film on substrate diffusion can be eliminated. The reaction order catalyst indicates is confirmed to exist as a monomer IL Au-IL/AC system, which different from fast equilibrium “Au dimer ...

In article number 2004599, Javier Pérez-Ramírez and co-workers demonstrate that platinum chloride in aqueous solution promotes the dispersion of large gold nanoparticles on carbon carriers into single atoms, forming bimetallic single-atom catalysts with improved resistance against sintering at high temperatures under harsh reductive reaction conditions vinyl production via acetylene hydrochlori...

Acetylene hydrochlorination is a major industrial technology for manufacturing vinyl chloride monomer in regions with abundant coal resources; however, it is plagued by the use of mercury(II) chloride catalyst. The development of a nonmercury catalyst has been extensively explored. Herein, we report a N-doped carbon catalyst derived from ZIF-8 with both high activity and quite good stability. T...

In recent years, there have been three significant pieces of research which helped propel gold catalysis research into the forefront: the discoveries that gold/silica can catalyse the hydrogenation of pentene, that gold on carbon can be used in the hydrochlorination of acetylene and that deposition-precipitation (DP) methods can be used to prepare nanogold on titania capable of enabling the oxi...

The formation of highly active and stable acetylene hydrochlorination catalysts is great industrial importance. successful replacement the toxic mercuric chloride catalyst with gold has led to a flurry research in this area. One key aspect, which commercialization use thiosulphate as stabilizing ligand. This study investigates range sulfur containing compounds promoters for production Au/C cata...