Temperature dependence of Cu–Al spinel formation and its catalytic performance in methanol steam reforming

2017 ◽  
Vol 7 (21) ◽  
pp. 5069-5078 ◽  
Author(s):  
Yajie Liu ◽  
Shaojun Qing ◽  
Xiaoning Hou ◽  
Fajie Qin ◽  
Xiang Wang ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Steam Reforming ◽  
Catalytic Performance ◽  
Methanol Steam Reforming ◽  
Spinel Formation ◽  
Synthetic Temperature

Synthetic temperature strongly influences the properties of Cu1−3xVxAl2+2xO4. Active Cu generated in situ can be stabilized by defect spinels.

Influence of the component interaction over Cu/ZrO2 catalysts induced with fractionated precipitation method on the catalytic performance for methanol steam reforming

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30176-30183 ◽  
Author(s):  
Jiajia Zhou ◽  
Ye Zhang ◽  
Guisheng Wu ◽  
Dongsen Mao ◽  
Guanzhong Lu
Keyword(s):  
Steam Reforming ◽  
Catalytic Performance ◽  
Precipitation Method ◽  
Methanol Steam Reforming ◽  
Steam Reforming Of Methanol ◽  
Component Interaction ◽  
Production Of Hydrogen ◽  
Composition Ratios

A series of binary Cu/ZrO2 catalysts by choosing different composition ratios and different precipitation sequences have been prepared for the production of hydrogen by steam reforming of methanol (SRM).

scholarly journals Influence of the ZrO2 Crystalline Phases on the Nature of Active Sites in PdCu/ZrO2 Catalysts for the Methanol Steam Reforming Reaction—An In Situ Spectroscopic Study

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1005
Author(s):  
Daniel Ruano ◽  
Beatriz M. Pabón ◽  
Càtia Azenha ◽  
Cecilia Mateos-Pedrero ◽  
Adélio Mendes ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Active Sites ◽  
Surface Composition ◽  
Ambient Pressure ◽  
Chemical Properties ◽  
Spectroscopic Studies ◽  
Metal Species ◽  
Methanol Steam Reforming ◽  
Reaction Products

In this work, the electronic properties of the metal sites in cubic and monoclinic ZrO2 supported Pd and PdCu catalysts have been investigated using CO as probe molecule in in-situ IR studies, and the surface composition of the outermost layers has been studied by APXPS (Ambient Pressure X-ray Photoemission Spectroscopy). The reaction products were followed by mass spectrometry, making it possible to relate the chemical properties of the catalysts under reaction conditions with their selectivity. Combining these techniques, it has been shown that the structure of the support (monoclinic or cubic ZrO2) affects the metal dispersion, mobility, and reorganization of metal sites under methanol steam reforming (MSR) conditions, influencing the oxidation state of surface metal species, with important consequences in the catalytic activity. Correlating the mass spectra of the reaction products with these spectroscopic studies, it was possible to conclude that electropositive metal species play an imperative role for high CO2 and H2 selectivity in the MSR reaction (less CO formation).

Strategic use of CuAlO2 as a sustained release catalyst for production of hydrogen from methanol steam reforming

2018 ◽  
Vol 54 (86) ◽  
pp. 12242-12245 ◽  
Author(s):  
Shaojun Qing ◽  
Xiaoning Hou ◽  
Yajie Liu ◽  
Lindong Li ◽  
Xiang Wang ◽  
...  
Keyword(s):  
Sustained Release ◽  
Steam Reforming ◽  
Catalytic Performance ◽  
Methanol Steam Reforming ◽  
Production Of Hydrogen ◽  
Excellent Catalytic Performance

Using sustained release catalysis, CuAlO2 catalyst demonstrates excellent catalytic performance for methanol steam reforming and can be completely regenerated.

scholarly journals The Promoting Effect of Ni on Glycerol Hydrogenolysis to 1,2-Propanediol with In Situ Hydrogen from Methanol Steam Reforming Using a Cu/ZnO/Al2O3 Catalyst

Catalysts ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 412 ◽  
Author(s):  
Yuanqing Liu ◽  
Xiaoming Guo ◽  
Garry Rempel ◽  
Flora Ng
Keyword(s):  
Steam Reforming ◽  
Molecular Hydrogen ◽  
Biodiesel Production ◽  
Precipitation Method ◽  
Methanol Steam Reforming ◽  
Phase Reaction ◽  
Promoting Effect ◽  
High Hydrogen ◽  
Al2o3 Catalyst

Production of green chemicals using a biomass derived feedstock is of current interest. Among the processes, the hydrogenolysis of glycerol to 1,2-propanediol (1,2-PD) using externally supplied molecular hydrogen has been studied quite extensively. The utilization of methanol present in crude glycerol from biodiesel production can avoid the additional cost for molecular hydrogen storage and transportation, as well as reduce the safety risks due to the high hydrogen pressure operation. Recently the hydrogenolysis of glycerol with a Cu/ZnO/Al2O3 catalyst using in situ hydrogen generated from methanol steam reforming in a liquid phase reaction has been reported. This paper focusses on the effect of added Ni on the activity of a Cu/ZnO/Al2O3 catalyst prepared by an oxalate gel-co-precipitation method for the hydrogenolysis of glycerol using methanol as a hydrogen source. It is found that Ni reduces the conversion of glycerol but improves the selectivity to 1,2-PD, while a higher conversion of methanol is observed. The promoting effect of Ni on the selectivity to 1,2-PD is attributed to the slower dehydration of glycerol to acetol coupled with a higher availability of in situ hydrogen produced from methanol steam reforming and the higher hydrogenation activity of Ni towards the intermediate acetol to produce 1,2-PD.

scholarly journals Catalytic performance of Ni-Cu/Al2O3 for effective syngas production by methanol steam reforming

Fuel ◽  
2018 ◽  
Vol 232 ◽  
pp. 672-683 ◽  
Author(s):  
Martin Khzouz ◽  
Evangelos I. Gkanas ◽  
Shangfeng Du ◽  
Joe Wood
Keyword(s):  
Steam Reforming ◽  
Catalytic Performance ◽  
Methanol Steam Reforming ◽  
Syngas Production

scholarly journals Propane Steam Reforming over Catalysts Derived from Noble Metal (Ru, Rh)-Substituted LaNiO3 and La0.8Sr0.2NiO3 Perovskite Precursors

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1931
Author(s):  
Theodora Ramantani ◽  
Georgios Bampos ◽  
Andreas Vavatsikos ◽  
Georgios Vatskalis ◽  
Dimitris I. Kondarides
Keyword(s):  
Noble Metal ◽  
Steam Reforming ◽  
Catalytic Performance ◽  
Parent Material ◽  
Partial Substitution ◽  
Propane Conversion ◽  
Reaction Conditions ◽  
Long Term Stability

The propane steam reforming (PSR) reaction was investigated over catalysts derived from LaNiO3 (LN), La0.8Sr0.2NiO3 (LSN), and noble metal-substituted LNMx and LSNMx (M = Ru, Rh; x = 0.01, 0.1) perovskites. The incorporation of foreign cations in the A and/or B sites of the perovskite structure resulted in an increase in the specific surface area, a shift of XRD lines toward lower diffraction angles, and a decrease of the mean primary crystallite size of the parent material. Exposure of the as-prepared samples to reaction conditions resulted in the in situ development of new phases including metallic Ni and La2O2CO3, which participate actively in the PSR reaction. The LN-derived catalyst exhibited higher activity compared to LSN, and its performance for the title reaction did not change appreciably following partial substitution of Ru for Ni. In contrast, incorporation of Ru and, especially, Rh in the LSN perovskite matrix resulted in the development of catalysts with significantly enhanced catalytic performance, which improved by increasing the noble metal content. The best results were obtained for the LSNRh0.1-derived sample, which exhibited excellent long-term stability for 40 hours on stream as well as high propane conversion (XC3H8 = 92%) and H2 selectivity (SH2 = 97%) at 600 °C.

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