Mesoporous co/ceo2 catalyst for hydrogen production by steam reforming of ethanol and preparation method thereof

Abstract

The invention relates to a mesoporous Co / CeO2 catalyst for a hydrogen preparation reaction by reforming an ethanol vapor and a preparation method thereof. The size of the particle diameter of a mesoporous CeO2 carrier is 12nm or so; the specific surface area of the mesoporous CeO2 carrier can reach up 177m<2> / g; the pore structures of the mesoporous CeO2 carrier are sequentially arranged in a short range; the bore diameters of the mesoporous CeO2 carrier are mainly distributed within 3nm or so; cobalt (Co) taken as an active component is carried on the mesoporous CeO2 carrier; the carrying quantity of CoO2 is 5% to 20% of the mass of the catalyst. The mesoporous CeO2 prepared by using a hard template method has the large specific surface area, the short-range and sequential pore structures and the uniformly distributed bore diameters. The mesoporous CeO2 prepared from mesoporous carbon CMK-3 is mainly used for exposing a high-energy crystal face (110) and has a better oxygen storing / releasing capacity.

Description

technical field [0001] The invention relates to a kind of mesoporous Co / CeO used for hydrogen production reaction of steam reforming of ethanol 2 A catalyst and a preparation method thereof belong to the field of hydrogen production by steam reforming of ethanol. Background technique [0002] The depletion of fossil energy and the increasing social problems such as environmental pollution force people to seek sustainable development and pollution-free secondary new energy. Hydrogen energy has attracted much attention due to its environmental protection and high efficiency. In recent years, its applied research has focused on hydrogen-fuel cell vehicles and proton exchange membrane fuel cells. Ethanol has the advantages of being non-toxic, environmentally friendly, easy to store and has a wide range of sources, and is regarded as a promising raw material for hydrogen production. The feasibility of hydrogen production by steam reforming of ethanol has been confirmed thermod...

AI Technical Summary

Problems solved by technology

For example, Chinese patent CN102500384A discloses a method for preparing a hydrogen production catalyst for steam reforming of ethanol composed of lanthanum oxide, nickel oxide, cobalt oxide, and praseodymium oxide derived composite oxides. However, the method is prepared by co-precipitation The specific surface area of ​​the composite is small, which is not conducive to the storage and release of oxygen of the catalyst, so the catalytic activity is not high

Chinese patent CN1544310A discloses a catalyst for hydrogen production by steam reforming of ethanol and its preparation method, and discloses that the catalyst can be composed of at least one transition metal or transition metal alloy supported rare earth metal oxide, but this patent does not Mesoporous Catalyst Supports are More Favorable for Catalytic Performance Reports

For example, Chinese patent CN1792766A discloses a method for hydrogen production by steam reforming of ethanol, in which a cobalt / cerium oxide catalyst is used. However, the catalyst in this patent is prepared by coprecipitation, and the obtained carrier cerium oxide cannot reach The mesoporous structure, at the same time, leads to a different ratio of exposed crystal facets, which makes the catalytic performance of the catalyst lower

Images