Palladium–Silver Sol–Gel Catalysts for Selective Hydrodechlorination of 1,2-Dichloroethane into Ethylene

Highly selective hydrodechlorination of CCl4 into CHCl3 on Ag–Pd/carbon catalysts

“…And it is clear that the surface Ag/Pd atomic ratios of Ag-Pd/C catalysts are much higher than the corresponding nominal values, suggesting a very marked enrichment in silver for Ag-Pd alloy surface. This is in agreement with the results obtained by Heinrichs according to CO chemisorption, XRD and TEM [11].…”

“…The results obtained by Heinrichs by means of CO chemisorption, XRD and TEM show a very pronounced surface enrichment of Ag in the Ag-Pd alloy [11]. Our previous study [12] suggested that the saturation coverage of H 2 adsorption decreases with an increase in the Ag/Pd atomic ratio, which may be caused by blocking of some Pd surface by Ag.…”

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

“…In gas-phase HDC, deactivation of noble metal catalysts has been linked to poisoning by HCl and/or Cl, formation of carbonaceous deposits, loss of metal through the formation of volatile chlorides, and metal sintering [8,16,23,[27][28][29][30][31]. However, most of these studies do not address the HDC of CMs and very few publications refer to activated carbon-supported noble metal catalysts.…”

Synthesis and characterization of a mesoporous HMS and its use as support of platinum catalysts

“…Moreover, Pt/HMS (HCl) presents a stable activity after 150 min, and this activity is four times higher than that of platinum on commercial silica. Even though this type of reaction leads to pore blocking due to coke deposition [26], the width of the pores is such that the catalytic activity can maintain an acceptable value after 4 h of reaction with the HMS supported catalysts.…”

“…Taking into account that the DCA-HdCl over Pd/SiO 2 catalysts is a structure insensitive reaction [25][26][27], this change in activity may be related to the dispersion of Pt, which in turn is associated to the mesoporous structure of the support. The conversion of DCA as a function of time is shown in Fig.…”