Deactivation behavior of Pd/C and Pt/C catalysts in the gas-phase hydrodechlorination of chloromethanes: Structure–reactivity relationship

Abstract

Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in:

Tetrachloromethane as an Effective Agent to Transform Nanoparticles of Palladium and Gold in Supported Catalysts

“…As several previous studies on the catalytic HDC on Pd involved different reaction temperatures (70–90 °C in our studies vs. ≥150 °C in Refs. , ), we decided to investigate the effect of carbiding in a wide temperature range (30–150 °C).…”

“…studied their spent Pd catalysts by XRD, they did not report the formation of PdC x . Recent studies of the HDC of CH 2 Cl 2 and CHCl 3 over Pd/C showed considerably different degrees of Pd carbiding, which depended on the number of Cl atoms in the reactant molecule and the catalytic behavior (deactivation) related to this effect. As several previous studies on the catalytic HDC on Pd involved different reaction temperatures (70–90 °C in our studies vs. ≥150 °C in Refs.…”

Ag–Ni bimetallic SiBEA zeolite as an efficient catalyst of hydrodechlorination of 1,2-dichloroethane towards ethylene

“…Hydrodechlorination is known as structural sensitive reaction, but among the researchers opinions are divided on the effect of metal(s) dispersion and metal particle size on this process. Some of the scientists claim that higher metal particles size and smaller dispersion play the crucial role in activity and stability of HDC catalysts [3,4]. On the other hand, some of the literature data clearly show the beneficial role of excellent dispersed very small metal particles in hydrodechlorination process [5].…”

Catalytic removal of trichloroethylene from water over palladium loaded microporous and hierarchical zeolites

“…The cost of HDC would be associated mainly to hydrogen consumption and catalysts. Non-reacted hydrogen can be recirculated to the reactor after scrubbing/absorption with water or alkaline solution to remove HCl, which reduces substantially reagents costs [6,7].Noble metals such as palladium and platinum, thanks to strong hydrogenation activity are still considered as the most popular catalyst in hydrodechlorination processes [7,8,9]. In addition to metal phase, the support plays an important role in both catalytic activity and stability of the catalyst.…”