Cradle to Gate
Identity ID
53c04207-0423-46ba-8e5d-6b351c6b9c4f
Materials
Associated ID
128473c0-8e54-49fc-a262-6a214d38da69
Included activities starts
Included activities ends
Description
Low-pressure steam refers to steam with a pressure below 2.5 MPa and a temperature not exceeding 400 °C. This dataset includes primary raw materials, auxiliary materials, energy consumption, atmospheric emissions, and waste from the production process. Infrastructure such as equipment manufacturing and plant construction is excluded from the system boundary of the dataset. The life cycle inventory is compiled from multiple data sources. The molar ratio of chlorine to hydrogen is 1:1.06. Low-pressure steam is a by-product of this process, and the final inventory is obtained through physical allocation.
Activity Description
Dry chlorine and hydrogen gases pass through buffer tanks and pressure regulators to stabilize their pressures at set values. The stabilized chlorine and hydrogen gases enter the synthesis furnace in a predetermined ratio for combustion reaction to produce hydrogen chloride. Hydrogen and chlorine gas flows are automatically monitored and proportionally adjusted by a ratio controller to ensure proper chlorine-to-hydrogen ratio. The produced hydrogen chloride gas is absorbed in the falling film absorber of a combined three-in-one furnace and further by an external integrated off-gas absorption tower, using pure water as the absorbent.
Process Description
Low-pressure steam refers to steam with a pressure below 2.5 MPa and a temperature not exceeding 400 ℃.
Time period
2022
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The chemical reaction equation for the direct synthesis method is Cl2 + H2 -> 2HCl. To ensure complete reaction of chlorine during the process, hydrogen is typically in excess in actual production. Generally, the molar ratio of chlorine to hydrogen fed into the synthesis furnace is controlled at 1:(1.05--1.1). In this dataset, the Cl2:H2 ratio is taken as 1:1.06.