Catalyst for water vapor reformation of ethanol to prepare hydrogen and its preparing method and use

Abstract

The present invention discloses a kind of catalyst for water vapor reformation of ethanol to prepare hydrogen and its preparation process and use. The catalyst includes composite carrier of alumina and magnesia and at least one of carried transition metal, transition metal alloy, and transition metal-RE metal mixed oxide. The preparation process includes the following steps: preparing catalyst carrier, compounding water solution of nitrate, setting the carrier into the water solution of nitrate and adding urea via stirring, evaporating to eliminate water, stoving, grinding and roasting. The catalyst has low carrier cost and simple preparation process, is used in water vapor reformation of ethanol to prepare hydrogen, and can result in low reaction temperature, high hydrogen selectivity and no generation of side products ethylene, acetaldehyde, etc.

Description

technical field [0001] The invention relates to a catalyst, a preparation method and application, in particular to a catalyst for hydrogen production, a preparation method and the use of the catalyst for hydrogen production by steam reforming of ethanol, which belongs to the fuel cell hydrogen source technology. Background technique [0002] In the past 20 to 30 years, in order to solve the problem of sustainable development of energy and environment, coupled with the depletion of fossil fuels, the development and utilization of clean renewable energy has attracted much attention. As a clean energy, hydrogen is attracting more and more attention. [0003] Hydrogen is an efficient, clean and renewable energy, which will play a significant role in the sustainable development of the global energy system and will have a huge impact on the global ecological environment. Hydrogen itself is renewable and when burned produces only water and no pollutants, not even CO 2 , can achie...

AI Technical Summary

Problems solved by technology

Among copper-based catalysts, ZnO and SiO are mainly studied 2 、Cr 2 o 3 , Nb 2 o 5 Carrier supported copper catalyst, the catalyst has better activity at low temperature, but the hydrogen selectivity is low, it is easy to generate acetaldehyde, ethylene and other by-products, and it is easy to deposit carbon, so it is not conducive to the hydrogen production process

al 2 o 3 Usually used as catalyst support for reforming reactions, however, due to Al 2 o 3 It is acidic and easy to dehydrate ethanol to form ethylene, thereby reducing the selectivity of hydrogen. At the same time, ethylene is easy to polymerize and cause carbon deposition