Palladium hydrogenation catalyst based on a porous carbon material obtained upon the dehydrochlorination of a chloro polymer

Abstract

The applicability of a porous carbon material obtained as a result of the "chemical" dehydrochlo rination of chlorinated polyvinyl chloride as a support for palladium hydrogenation catalysts was demon strated. The efficiency of the catalyst was evaluated in the liquid phase reactions of nitrobenzene hydrogena tion and chlorobenzene hydrodechlorination. Although the specific activity of the catalyst was lower by a fac tor of 3-4 than that of the samples based on Sibunit and carbon nanotubes, the complete conversion of the initial compounds with the selective formation of end products under mild conditions was achieved at a rel atively low palladium content (1.5%).

Pd supported catalyst for gas-phase 1,2-dichloroethane abatement: Efficiency and high selectivity towards oxygenated products

“…For this reason, in the last few decades, research has focused on the development of catalytic processes that could allow operating at low temperatures in order to decrease the processing cost and NO x emissions. Recently, much effort has been devoted to the development of catalytic systems for hydrodechlorination processes to transform Cl-VOCs to unsaturated hydrocarbons with high added value [4][5][6][7][8][9]. However, the economic viability of this strategy, which involves hydrogen consumption and a demanding catalyst activation step, lacks evidence to be considered as an alternative.…”

The phenomenon of “dead” metal in heterogeneous catalysis: opportunities for increasing the efficiency of carbon-supported metal catalysts

“…This effect has been discussed in the context of palladium and platinum catalysts. 32,33,[35][36][37][38][39][40][41][42][43] Metal blockage in micropores occurs when the size of metal NPs aligns with the size of the micropores. Under such circumstances, a signicant portion of the metal NP surface trapped in similarly sized micropores comes into close contact with the pore walls, thereby becoming inaccessible to adsorbate or reactant molecules (Fig.…”