Na-promoted Ni/ZrO₂dry reforming catalyst with high efficiency: details of Na₂O–ZrO₂–Ni interaction controlling activity and coke formation

Abstract

Balanced, strong interaction of Ni–Na2O–ZrO2 catalyst components under CO2 reforming of methane is a criterion of good catalytic activity and stability.

Design of stable Ni/ZrO2 catalysts for dry reforming of methane

“…Zr82Ni3imp (3 wt.% Ni/ZrO2), Fig. S3-4) synthesized by impregnation with the concomitant addition of NaHCO3 published previously [50,51]. Although the Ni particle size of these two catalysts were relatively large (20 nm) as estimated by XRD and CO chemisorption, XPS suggested higher surface Ni fraction.…”

“…Determination of Ni particle size on ZrO2 was difficult by the conventional methods, i.e., XRD, TEM and XAFS, due to the impact of the ZrO2 support [11,50,51]. Therefore, SiO2…”

Hindered methane decomposition on a coke-resistant Ni-In/SiO2 dry reforming catalyst

“…In the case of complete dissociation, carbon atoms may diffuse into the metal particle or polymerize on its surface forming various carbonaceous structures [6,7]. Therefore, one of the strategies against coking is the modification of the active metal surface with other elements [8][9][10][11][12] to inhibit the formation of multiple bonded carbon species. Following this approach, we have recently shown that on a nickel-indium bimetallic catalyst carbon formation is inhibited during DRM [13].…”

Development of Highly Stable Low Ni Content Catalyst for Dry Reforming of CH4‐Rich Feedstocks

“…In terms of active metal price and loading, productivity and stability against coking, La.Ni(CA)/Mg 1.3 AlO x .1000 is one of the most promising candidates for DRM under CH 4 -rich conditions (Table S. 3). [47,[49][50][51] We conclude that catalysts supported on Mg 1.3 AlO x .1000 possess improved coking resistance without losing the DRM activity and are therefore suitable for the reaction with CH 4 -rich feed. Citric acid induces a high dispersion already during the catalyst preparation.…”

“…These factors are crucial for both carbon removal by CO 2 and stably high DRM performance with high H 2 yield of La.Ni(CA)/Mg 1.3 AlO x .1000. In terms of active metal price and loading, productivity and stability against coking, La.Ni(CA)/Mg 1.3 AlO x .1000 is one of the most promising candidates for DRM under CH 4 ‐rich conditions (Table S. 3) …”