Hydrochlorination of acetylene using carbon-supported gold catalysts: A study of catalyst reactivation

Synthesis of Au/C Catalysts by Ultrasonic-Assisted Technique for Vinyl Chloride Monomer Production

“…Thus, enhancing dispersion of Au catalyst on activated support should improve the catalytic performance. In this study, the amount of gold loading on catalyst is controlled at 1% wt Au/C, following the literatures [8,15] and the effect of ultrasonic driven time of the UL catalyst synthesis on catalyst characteristics (measured by XRD and TPR) and catalytic activity of the acetylene hydrochlorination reaction is determined and compared with those of the catalyst prepared by using conventional impregnation method. The results of X-ray diffraction (XRD) patterns of CI and UL samples at various driven times are shown in Fig.…”

“…Pt 3+ and Pd 2+ complexes in solution show high activity but they are very unstable [7]. For solid catalysts, gold-based catalyst has been considered as a promising catalyst to replace the mercury-based catalysts among various metal salts i.e., Au 3+ [5,8,9], Cu 2+ [10], Pd 2+ [11], Pt 2+ [12,13] and Bi 3+ [14]. However, their performance is not satisfactory for commercial production due to stability problems.…”

Catalysis using colloidal-supported gold-based nanoparticles

“…After these important discoveries, many research groups in academia and industry have focused their research upon exploring the catalytic performance of Au catalysts for a wide range of oxidation and hydrogenation reactions [5,6]. New discoveries have been reported since that period, and novel, designed supported gold nanoparticles have shown to be extremely effective catalysts for the oxidation of CO [7][8][9][10][11], the selective oxidation of alcohols and polyols [12,13], the epoxidation of olefins [14,15], the hydrochlorination of ethyne [16], the selective hydrogenation of unsaturated carbonyl and nitro groups [17], and the direct synthesis of hydrogen peroxide from molecular hydrogen and oxygen [18]. Whilst these monometallic Au nanoparticles have been shown to be effective redox catalysts, we have shown over the last decade that using bimetallic catalysts, such as Au-Pd catalysts, a significant improvement in terms of catalytic reactivity and stability for a range of reactions, such as the oxidation of alcohols [19] and hydrogen peroxide synthesis [20][21][22], could be observed.…”

The Preparation of Cu-g-C3N4/AC Catalyst for Acetylene Hydrochlorination

“…Thermal gravity analysis is conducted under oxidizing conditions, and this analysis is used to obtain information regarding carbonaceous material deposition on catalysts [22]. The extent of carbon deposition on the catalysts is shown in Table 4.…”