Hydrochlorination of Acetylene Catalyzed by an Activated Carbon-Supported Ammonium Hexachlororuthenate Complex

Abstract

Ammonium hexachlororuthenate ((NH 4 ) 2 RuCl 6 ) complex was used as a catalyst precursor and coconut activated carbon (AC) was used as the support in the preparation process of the Ru-based catalyst. (NH 4 ) 2 RuCl 6 /AC catalyst was prepared via an incipient wetness impregnation method and assessed in an acetylene hydrochlorination reaction. Meanwhile, the (NH 4 ) 2 RuCl 6 /AC catalyst was analyzed with low-temperature N 2 adsorption/desorption, thermogravimetry (TG), transmission electron microscopy (TEM), temperature programmed reduction (TPR), X-ray photoelectron spectra (XPS), and temperature programmed desorption (TPD) techniques. Catalytic performance test results show that the (NH 4 ) 2 RuCl 6 /AC catalyst exhibits a superior catalytic activity with the highest acetylene conversion of 90.5% under the conditions of 170 • C and an acetylene gas hourly space velocity of 180 h −1 . The characterization results illustrate that the presence of the NH 4 + cation can inhibit coke deposition as well as the agglomeration of ruthenium particles, and it can also enhance the adsorption ability for reactant HCl, hence improving the catalytic activity and stability.

Design of choline chloride modified USY zeolites for palladium-catalyzed acetylene hydrochlorination

“…1 ). 75 Combined with the HCl-TPD and C 2 H 2 -TPD data, it is well shown that the incorporation of ChCl can improve the adsorption ability of the Pd@USY catalyst to both the HCl and C 2 H 2 reactants, which is beneficial to the catalytic reaction. Moreover, C 2 H 3 Cl-TPD experiments were performed to further study the effect of the presence of ChCl ligand on the adsorption ability of C 2 H 3 Cl product.…”

Activated Carbon-Supported Ruthenium as a Catalyst for the Solvent- and Initiator-Free Aerobic Epoxidation of Limonene

“…Although the catalyst prepared via cation exchange Ru/G60 5%(CE) exhibited a lower conversion (35%) than the one prepared by the SI method (40.4%), it allowed achieving the highest selectivity and yield toward epoxidation products. The higher stability of the metallic precursor (NH 4 ) 2 RuCl 6 used in the cation exchange method compared to RuCl 3 used in sol immobilization may also contribute to reducing the aggregation of Ru particles during the reaction . That could be a hypothesis for the lower Ru particle size and higher catalytic activity of the former catalyst after 6 h of reaction.…”

“…The higher stability of the metallic precursor (NH 4 ) 2 RuCl 6 used in the cation exchange method compared to RuCl 3 used in sol immobilization may also contribute to reducing the aggregation of Ru particles during the reaction. 58 That could be a hypothesis for the lower Ru particle size and higher catalytic activity of the former catalyst after 6 h of reaction.…”

Research Progress on Adsorption and Separation of Petroleum Hydrocarbon Molecules by Porous Materials

“…Polar selective adsorption materials are widely used in practical production because of their simple and convenient synthesis method, recyclability, and high economic value. The main representatives of these materials are activated carbon, alumina, molecular sieve, etc., which are characterized by ultra-high pore size, specific surface area, and surface degree points [23]. Thus, they are widely used in waste gas treatment, wastewater treatment, and other fields.…”