Ni–Cu/Al₂O₃ catalysts for the selective hydrogenation of acetylene: a study on catalytic performance and reaction mechanism

Abstract

Employing in situ DRIFTS spectra have successfully elucidated the reaction mechanism of Ni&Cu-NP/γ-Al2O3 catalyzed C2H2 semihydrogenation reaction.

Mechanism driven design of trimer Ni1Sb2 site delivering superior hydrogenation selectivity to ethylene

“…The formation of ethylene on the Ni catalyst is evidenced by the characteristic peaks of the CH 2 scission and the C=C stretching vibration 45 at 1607 and 1709 cm −1 , respectively. In addition, the peaks at 2933 and 2968 cm −1 corresponded to the -CH 2 asymmetric stretching of long-chain hydrocarbons and -CH 3 asymmetric stretching of alkanes 46 , respectively, indicate the facile coupling and over-hydrogenation processes on the Ni catalyst. These are in good accordance with observed higher selectivities to ethane and C 4 components in Fig.…”

Recent research advances on catalysts for selective hydrogenation of ethyne

“…Since VIII metals such as Pd and Ni are strong in ethyne activation and IB metal-based catalysts are selective for ethylene formation, VIII-IB bimetallic catalysts have been widely constructed to achieve high ethyne conversion and high selectivity towards ethylene simultaneously. Pd-Ag, 20,[101][102][103][104][105][106][107][108][109][110][111][112][113] Pd-Au, 114,115 Pd-Cu, [116][117][118] Ni-Cu, 119 Pt-Cu, 120 Ni-Ag, 121 and Ni-Au (ref. 122) have been developed.…”

A highly active catalyst derived from CuO particles for selective hydrogenation of acetylene in large excess ethylene

“…In general, Cu catalysts exhibited good hydrogenation activity at higher temperatures (4150 1C). 9,43,44 The marked difference between CuO(T120-R150) and Cu catalyst in hydrogenation activity might be related to the new crystal phase of Cu x C. [23][24][25] It was reported that, compared with the parent metals, interstitial metal carbides were more capable of adsorbing/activating H 2 and transferring active hydrogen to the reactant molecules. 45 Fig.…”