Modern coal chemical industry clean and efficient key technology - carbon chemical industry

Modern industry, which relies on traditional fossil fuels such as coal and oil, is one of the main sources of carbon emissions. As an important carbon emission field in the chemical industry, coal chemical industry is the key transformation and upgrading industry in the future. In this regard, modern coal chemical industry came into being, which is based on gasification and catalytic conversion of syngas, is conducive to the centralized removal and treatment of pollutants, and is an effective way to clean and efficient utilization of coal.

Among them, carbon-chemical technology is the key technology of modern coal chemical industry, which has achieved great success in industrial application in the past 10 years.

Carbon chemical (C1 chemical) refers to the process of converting a carbon atomic compound (CO, CO2, CH4, CH3OH, HCHO, etc.) into a synthetic chemical product or liquid fuel or chemical material, especially the modern coal chemical industry based on syngas (CO+H2).

Carbon - chemical technology raw materials and applications

The traditional raw materials of carbon-chemical technology are mainly coal and heavy oil. With the adjustment of energy structure and the drive of low-carbon policy, methane resources have gradually become one of the raw materials. The main applications of carbon-chemical industry are the following three aspects: hydrocarbon and fuel oil synthesis. Synthesis of oxygenated compounds, such as methanol, formic acid, formaldehyde, acetic acid, acetic anhydride, higher alcohols, esters, etc. Synthesis of nitrogenous compounds, such as hydrocyanic acid, dimethylformamide (DMF), isocyanate (TDI, MDI), amino acid products, etc.

Efficient catalytic technology in the field of carbon - chemical industry

Carbon-chemical thermal catalysis technology: The carbon-chemical process is mainly a thermal catalytic conversion process of syngas and methanol as the base material, especially the rapid development of modern coal chemical industry based on large-scale gasification in the past 20 years, which has promoted the gradual maturity of the basic theory and process technology of thermal catalysis. For example, the catalytic conversion of CO to methane, hydrocarbon oil, methanol and other products has been realized large-scale industrial applications; Methanol catalytic dehydration can be gradually converted into dimethyl ether, olefins, aromatics and gasoline products, similar to CO hydrogenation catalysis, CO2 hydrogenation can also selectively obtain methane, methanol, dimethyl ether and hydrocarbons such as olefins, aromatics and oil products.

Carbon-chemical photoelectric catalysis: The use of photoelectric catalysis for carbon dioxide reduction to synthesize chemical products or fuels can solve the H2 source problem in the carbon dioxide hydrogenation reaction, and it is possible to achieve negative carbon dioxide emissions. Electrocatalysis is a process in which carbon dioxide molecules or carbon dioxide solvated ions in solution obtain electrons from the electrode surface and undergo a reduction reaction. Photocatalytic carbon dioxide reduction reaction uses carbon dioxide as raw material and converts carbon dioxide into energy products and organic chemicals driven by sustainable solar energy.

The development prospect of carbon-chemical technology

In recent years, the high-efficiency catalytic technology, green low-carbon technology, separation and purification technology, reactor large-scale, system optimization technology and other aspects of the field of carbon chemical industry have made preliminary industrialization or engineering progress, which has promoted the high-quality development of China's energy chemical industry.

The core of carbon-chemical technology is the catalytic conversion of small molecules such as CO, methanol and carbon dioxide, and exploring new process routes and catalyst preparation technologies, improving catalytic conversion efficiency and product selectivity, reducing process energy consumption, and reducing carbon emissions will be the key core elements of the development of carbon-chemical technology.

Carbon chemical involves a wide range of products, complicated process routes, can make many organic chemical products from the dependence on oil to coal, but also to achieve the existing "waste gas" (CO, CO2) reasonable use, especially the use of coal, really achieve high value-added and resources, energy, environmental protection of the high degree of unity, to promote the sustainable development of chemical industry.