Cradle to Gate
Identity ID
2f5ce30f-6f9f-410a-ae26-d293c08d9502
Materials
Associated ID
eae711c6-ee45-49d8-9400-f05c8315537e
Included activities starts
Included activities ends
Description
Fuming sulfuric acid is commonly used as a sulfonating agent, and is also widely used in fields such as the manufacture of dyes, explosives, nitrocellulose and pharmaceuticals; Fuming sulfuric acid is modelled as a pure substance; when modelling this substance, the user is required to add a solvent of their choice in the model. The dataset includes the main raw and auxiliary materials, energy, atmospheric emissions, wastewater and solid waste of the production process, while infrastructure such as the manufacture of production equipment and plant construction is not included within the dataset boundary; the data inventory is formed by merging data from multiple sources; the production activities of this product include flue-gas cooling, waste-heat recovery, fuming sulfuric acid absorption, blending and cooling, testing and storage circulation and other process steps.
Activity Description
The production activities of this product include flue gas cooling, waste heat recovery, oleum absorption, blending and cooling, detection and storage cycles and other processes.
Process Description
Oleum (also known as fuming sulfuric acid), with the chemical formula H₂SO₄·xSO₃ and CAS number 8014-95-7, is a solution of sulfur trioxide in sulfuric acid. It appears as a colorless to light brown, viscous, fuming liquid that emits choking sulfur trioxide fumes. Its density, melting point, and boiling point vary with SO₃ content. It exhibits hygroscopicity and strong corrosiveness. Oleum is commonly used as a sulfonating agent and is also widely employed in the manufacture of dyes, explosives, nitrocellulose, and pharmaceuticals. Modeling is based on the commonly used 105% oleum.
Time period
2019
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
Oleum production uses the sulfur trioxide absorption method as the absolute mainstream technology. It is produced by absorbing sulfur trioxide tail gas with concentrated sulfuric acid. The process is highly integrated with sulfuric acid production capacity, and holds an absolutely dominant position in the domestic oleum market. This dataset represents the mainstream technology: smelting flue gas containing SO3 is cooled by the economizer and then enters the oleum absorption tower, where SO3 is absorbed by sulfuric acid spray to form oleum. Unabsorbed SO3 is returned to the existing acid production system for acid making. The absorbed sulfuric acid is conditioned and cooled to obtain 105% oleum. Qualified oleum is stored in the storage tank or returned to the tower for secondary absorption, while unqualified oleum is returned to the tower or enters the 98% acid circulation tank. During the process, circulating cooling water is not discharged, and the detection waste liquid is returned to the circulation tank.