Cradle to Gate
Identity ID
1fd45695-4f6b-4b38-aa1d-53a54aaef2a8
Materials
Associated ID
81e45037-9ae7-41f5-8783-5a1872ac8a0e
Included activities starts
Included activities ends
Description
Methanol is one of the important chemicals produced from synthetic gas, serving both as a key chemical feedstock and as a fuel. This dataset includes major raw materials, auxiliary materials, energy inputs, atmospheric emissions, and waste generated during the production process; however, infrastructure such as production equipment and factory construction is excluded from the system boundary. The life cycle inventory is compiled from data sourced from multiple references. The coal-based ammonia production process includes steps such as gasification, shift conversion,low-temperature methanol wash, liquid nitrogen wash, purification, ammonia synthesis, and separation, with methanol being a by-product of this process.
Activity Description
The coal-to-synthetic ammonia process includes steps such as gasification, shift conversion, low-temperature methanol washing, liquid nitrogen washing, purification, ammonia synthesis, and separation, with methanol being a byproduct of this process.
Process Description
Methanol is an organic compound, with the CAS number 67-56-1 and IUPAC name methanol, and has the molecular formula CH₃OH. Under normal temperature and pressure conditions, methanol is a colorless, volatile liquid with a distinctive odor and a slightly sweet taste. It is an important chemical feedstock widely used in various fields. At the consumer level, methanol can be used to produce the following products: ① Solvents: Methanol is a common solvent used in the manufacture of paints, varnishes, and coatings; ② Fuels: As a biofuel, methanol can serve as a substitute or additive for gasoline in automotive fuels; ③ Chemicals: Methanol is a raw material for producing various chemicals. In the industrial sector, methanol is used to manufacture products such as plastics and resins, textiles, and antifreeze.
Time period
2019
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The water-coal slurry obtained from processed raw coal reacts with pure oxygen produced by the air separation unit, generating synthetic gas that is then sent to the shift conversion unit where CO in the synthetic gas reacts with steam to convert into CO2 and H2. When the CO content in the shifted gas decreases to 0.5%--1%, the gas is cooled and enters the cold methanol washing section to remove most of the H2S, CO2, and H2O. Subsequently, it enters the liquid nitrogen washing unit for further purification, reducing the CO+CO2 content in the decarbonized gas to less than 15 ppm, and after separation, is compressed to 13 MPa by a compressor. 9 MPa, together with the circulating gas discharged from the circulating gas compressor, enters the ammonia synthesis process, where ammonia is produced under the action of a catalyst, followed by separation to obtain liquid ammonia product; unreacted circulating gas is sent back to the circulating gas compressor for further recycling.