Elucidation of metal and support effects during ethanol steam reforming over Ni and Rh based catalysts supported on (CeO2)-ZrO2-La2O3

Abstract

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Insights into the Reaction Routes for H2 Formation in the Ethanol Steam Reforming on a Catalyst Derived from NiAl2O4 Spinel

“…However, the Al 2 O 3 acid sites also catalyze the ethanol dehydration, eq , yielding ethylene that undergoes decomposition to yield carbon material and H 2 through eq . The use of basic supports or the combination of basic oxides with Al 2 O 3 , such as La 2 O 3 , CeO 2 , ZnO, or ZrO 2 , improves the dispersion, prevents the sintering of the metal particles, and favors some reactions boosting the H 2 yield. − The presence of these oxides improves the oxygen mobility and the H 2 O adsorption and dissociation, resulting in promoting steam reforming reactions, eqs , , , and , the water–gas shift reaction, eq , and coke gasification, eq . The addition of basic promoters, such as CaO, reduces the support acidity and decreases the interaction between the metal precursor and the support, thus enhancing the formation of the metal particles onto the support .…”

Catalysts for Sustainable Hydrogen Production: Preparation, Applications and Process Integration

“…IPPAS B-1220, Synechococcus sp. I12, and Phormidium corium B-26) [141]. The maximum hydrogen accumulation was obtained with the wild-type, filamentous, non-heterocystous cyanobacterium Desertifilum sp.…”

“…It is worth noting that the combination of noble metals and non-precious metals to form a supported catalyst can not only settle the resource shortage of precious metals, but also reduce the material cost [137][138][139]. Furthermore, the supported catalysts greatly improve the catalytic capacity of AB due to adjust the electronic structure and surface geometry to adjust the catalytic performance [140][141][142]. Therefore, the supported catalysts of AB catalytic hydrolysis are the focus of research and development in the future.…”

Sustainable hydrogen-rich syngas from steam reforming of bio-based acetic acid over ZnO and CeO2–ZnO supported Ni-based catalysts

“…Compared with 15Ni/ZnO catalyst, 15Ni/CeO 2 -ZnO catalytic SR of bio-based acetic acid for sustainable hydrogen-rich syngas increases the yield, selectivity and content of H 2 from 51.0%, 90.5% and 60.4% to 74.0%, 91.3% and 64.1%, corresponding to the growth rate of 45.1%, 0.9% and 6.1%, respectively. As CeO 2 promotes the water gas shi reaction,52 the yield, selectivity and content of CO are reduced from 35.7%, 53.4% and 21.1% to 33.2%, 40.1%, and 14.4%, respectively, and the corresponding H 2 /CO ratio increases from 2.9 to 4.5. The yields of CO 2 and CH 4 are signicantly improved from 25.8% and 5.4% to 42.6% and 7.0%, respectively.…”