Propylene Production ; Propylene ; Catalytic Cracking Route ; Naphtha

Categories:
Categories:
Unit processes/Materials production/Organic chemicals
Location:
ZJ-GD-CN
Reference year: 2018 -
Description

The catalytic cracking process route mainly includes two processes of catalytic cracking and gas fractionation. The former includes sub-processes such as reaction-regeneration, energy recovery, fractionation, absorption stabilization, denitrification, desulfurization, and dust removal, while the latter includes depropanization, deethanization, and propylene refining. The main inputs of the catalytic cracking route include raw materials (ie heavy oil and hydrogenated diesel oil), energy sources (ie electricity, fresh water and steam), and auxiliary materials such as catalyst alumina. Propylene accounts for 33% of production by weight, with by-products being ethane and propane, C4 and C5 fractions, and LPG. It is worth noting that the steam by-products generated by coke combustion are transported outside the target plant for use. This process compensates for the environmental impact caused by raw material production and energy consumption, and reduces the environmental burden. When utilizing this data set for life cycle assessment or other environmental impact studies, it's essential to consider the environmental load of both the main product and the by-products proportionally based on their masses. Since the factory does not include the transportation of intermediate raw materials, the environmental load limited to on-site processes must be considered. Additionally, waste discharges from all process stages are integrated into the analysis. The users of this data should not include the impacts of propylene use, end-of-life disposal of associated products, infrastructure construction, and equipment maintenance as these are outside the assessment boundary. Researchers need to ensure they reference the detailed input-output data of the propylene production process precisely as per the environmental impact assessment report published by the company.

Technology

The factory is an integrated refining and chemical system, so raw materials (heavy oil, hydrogenated diesel) are used as intermediate products, regardless of the transportation stage.

Process type
Unit
LCI modeling approach
Attributional
Multifunctional modeling
NONE
Format
ILCD
Aggregation type
HORIZONTAL
Data provider
TianGong
Review status
Internal
Cost
Free
Contact
Tiangong LCI Data Working Group