Cradle to Gate
Identity ID
b59e507ecaf94fd180ae1204248c860e
Materials
Associated ID
3d35cf44-e94e-439d-97d3-38bac693da21
Included activities starts
Included activities ends
Description
Sulfur is a co-product in the coal-based synthetic gas production of ethylene glycol, and can be used in chemicals and rubber products. This dataset includes major raw and auxiliary materials, energy consumption, and water emissions from the production process; however, environmental burdens associated with production equipment, factory infrastructure construction, and equipment maintenance are excluded from the system boundaries of the dataset. The life cycle inventory is compiled from data derived from multiple sources. The coal-based synthetic gas process for sulfur production involves oxygen generation via air separation, water-coal slurry gasification, water-gas shift, purification, cooling, CO separation, hydrogen production, dimethyl oxalate synthesis, refining, ethylene glycol synthesis, and distillation.
Activity Description
The process of producing sulfur from coal-derived synthesis gas includes steps such as air separation for oxygen production, water-coal slurry gasification, water-gas shift, purification, cooling, CO separation, hydrogen production, dimethyl oxalate synthesis, refining, ethylene glycol synthesis, and distillation.
Process Description
Sulfur is an inorganic substance with CAS number: 007704-34-9. Under IUPAC nomenclature, it is named "sulfur" with the molecular formula: S. It is solid under normal temperature and pressure conditions, appearing as a powder with no significant odor. It is modeled as a pure substance. Simulating this substance in solution requires users to add their chosen solvent within their models. At the consumer level, this substance is used in the following products: explosives, fertilizers, and plant protection products. In industrial settings, it is used in the production of products within the following areas: formulation and/or repackaging of mixtures. This substance is used in the manufacture of: chemicals and rubber products.
Time period
2020
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The specific processes include: (1) Air separation for oxygen production: producing low-pressure oxygen in an air separation unit for use in the gasification unit; (2) Coal gasification process: feeding coal feedstock into the gasifier to produce raw synthetic gas via a water-coal slurry gasification process; (3) Water-gas shift process: employing a sulfur-resistant partial shift process to adjust the H2:CO ratio (2:1) in the raw synthetic gas using CO; (4) Removal of acidic gases such as H2S, COS, and CO2 from the gas stream, then directing the purified synthetic gas to the ethylene glycol unit; (5) Separating CO through a deep cooling unit, and sending the purified hydrogen-rich gas to a PSA hydrogen production unit to generate hydrogen; CO within the ethylene glycol unit. , H2 and low-pressure oxygen are used in the synthesis of dimethyl oxalate, purification, ethylene glycol synthesis, distillation, and other processes to produce ethylene glycol and its by-products.