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[Chemical Knowledge]：Coal to methanol principle: let clean energy come out of coal

Read： 863 Time：20months ago Source：Transform the World with Simplicity

As one of the most important energy sources in China, coal accounts for more than 60%. However, the use of coal not only causes air pollution and environmental damage, but also has a serious impact on the global climate due to carbon dioxide emissions. Therefore, the development of clean energy has become an inevitable choice in China's energy sector.

coal-to-methanol technology is an important part of it. It realizes the utilization of clean energy by converting coal into methanol, and at the same time realizes the recovery and utilization of carbon dioxide, so it has attracted much attention. The principle of

coal to methanol can be simply summarized as the following steps:

1. coal gasification: coal is chemically reacted with water vapor under high temperature and high pressure to obtain gas containing carbon monoxide, carbon dioxide, hydrogen and methane. Synthesis gas. The shift reaction of the

2. synthesis gas: carbon monoxide and carbon dioxide in the synthesis gas are subjected to a shift reaction to produce a compound containing methanol, formaldehyde, formic acid and other compounds.

3. methanol extraction: After a series of separation and purification processes, methanol with a purity of up to 99.9% was extracted from the complex.
the principle of
coal-to-methanol seems simple, it involves a large number of chemical technologies and equipment. To achieve industrial-scale coal-to-methanol production also requires huge investment and technology accumulation. However, coal-to-methanol technology has the following advantages:
coal resources in the
1. are more abundant and dispersed, which reduces the hidden dangers of safety and environmental protection caused by the concentration of resources. Methanol converted from

2. coal can be used as efficient fuel with high energy density and stable supply level.

3. coal-to-methanol production process is completely closed, so carbon dioxide emissions can be controlled and recycled. At the same time, the combustion of methanol is also cleaner than coal and fuel oil, which can significantly reduce the negative impact of climate change.

China's coal-to-methanol technology development has begun to take shape. Taking Ningxia Coal Group as an example, its 500000-ton coal-to-methanol project has started construction in 2019 and is expected to become one of the largest coal-to-methanol production bases in the country after it is put into operation in 2022.

the future, coal-to-methanol technology will gradually mature and be used in a wider range of fields. For example, methanol is deeply processed and converted into chemicals such as propanol, ethylene glycol, and polyurethane with higher purity; or combined with new energy technologies to realize the coordinated utilization of clean energy such as coal and wind energy and solar energy. The development of
coal-to-methanol technology in
will contribute to China's energy transformation and clean energy utilization.