Cradle to Gate
Identity ID
1eaadb92-6dec-4627-9db8-7ab6d4d3f4d1
Materials
Associated ID
a315bfad-efdf-4b1e-854d-033ef44cff1b
Included activities starts
Included activities ends
Description
Liquefied natural gas (LNG) is an energy form produced by cooling and liquefying natural gas. LNG is primarily used in residential and industrial heating, electricity generation, and as transportation fuel. This dataset includes primary raw materials, energy inputs, atmospheric emissions, water discharges, and waste generated during the production process; infrastructure such as production equipment and facility construction is not included within the system boundary of the dataset. The life cycle inventory data are sourced from literature. The production process for diesel includes input of raw materials and process steps such as coal gasification, Fischer-Tropsch synthesis, and oil hydroprocessing in coal-to-liquids production, with liquefied natural gas being a by-product of this process.
Activity Description
The production activities of this product include the input of raw materials, as well as processes such as coal gasification, Fischer-Tropsch synthesis, and oil hydrocracking during coal-based diesel production, with liquefied natural gas being a by-product of this process.
Process Description
Liquefied natural gas (LNG) is an energy form produced by cooling and liquefying natural gas. Its main component is methane (CH4), along with small amounts of other hydrocarbons such as ethane and propane. At the consumer level, LNG is primarily used for residential and industrial heating, power generation, and as a transportation fuel.
Time period
2018
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The coal-based diesel process mainly includes three subprocesses: CG (coal gasification), FTS (Fischer-Tropsch synthesis), and OH (oil hydrocracking). First, raw coal is ground together with water and additives in a mill to form a slurry. Once the required particle size distribution is achieved, the coal slurry from the slurry preparation system is fed into the gasifier together with oxygen from the air separation unit to produce raw synthetic gas. The raw synthetic gas is cooled by direct contact with water and then cleaned in a venturi scrubber and scrubbing tower. Subsequently, the cooled and cleaned synthetic gas is fed into the WGS (water-gas shift) reactor to produce sufficient amounts of H2. The Rectisol (cold methanol wash) process is selected to remove CO2 and H2S from shifted synthetic gas in the AGR (acid gas removal) unit. The cleaned synthetic gas is then fed into a slurry-bed reactor for synthetic oil production. The oil is sent to a hydrocracking reactor to initiate the hydrocracking reaction. The bottom product from the hydrocracking reactor is fractionated in a distillation column to produce diesel and petrol.