Method for co-production of synthesis gas by carbonate hydrogenation refining for carbon dioxide emission reduction

Abstract

The invention discloses a method for co-production of synthesis gas by carbonate hydrogenation refining for carbon dioxide emission reduction. The method comprises the following steps: i) preparing hydrogen by using renewable energy source driving; and ii) taking the hydrogen obtained in the step i) as a reduction reaction gas, carrying out co-heat treatment on the reduction reaction gas and metal carbonate to obtain a metal oxide, and completing in-situ preparation of synthesis gas through carbon dioxide hydrogenation. According to the method, green hydrogen prepared from renewable energy reacts with metal carbonate to efficiently prepare metal oxide and synthesis gas, so that zero emission of carbon is realized, the greenhouse effect is relieved, the decomposition temperature of carbonate is greatly reduced, carbon emission reduction in cement, refractory and other industries is realized, and the problem of high cost of carbon dioxide hydrogenation can be solved; and meanwhile, synthesis gas with high additional value can be obtained and can be directly put into use or prepared into other high-value chemicals through a Fischer-Tropsch synthesis reaction, so that the economic benefit of oxide preparation is further improved, and the method has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparing metal oxides from carbonates, and in particular relates to a method for carbon dioxide emission reduction by hydrogenation refining of carbonates for co-production of synthesis gas. Background technique [0002] Metal oxides have attracted people's attention due to their excellent thermal stability and good chemical stability, and are widely used in the production of cement, steel, refractory materials, catalysts, magnetic materials, fluorescent materials, etc. At present, the most common way to prepare metal oxides in industry is to obtain metal oxides by pyrolysis of metal carbonates. However, the process usually involves extreme conditions such as high temperature, which not only increases the production cost, but also emits a large amount of carbon dioxide, which has a serious impact on the global ecological environment. The development of metal oxide preparation methods without carbon diox...

AI Technical Summary

Problems solved by technology

However, this process usually involves extreme conditions such as high temperature, which not only increases production costs, but also emits a large amount of carbon dioxide, which has a serious impact on the global ecological environment.

The development of metal oxide preparation methods without carbon dioxide emissions is one of the effective ways to achieve sustainable development. It has become a key scientific and technical issue that related industries urgently need to overcome. In addition, how to reduce the preparation cost by optimizing production conditions is still a huge challenge. challenge

Images