Polypropylene (PP) Production ; Coal to Polypropylene ; GLLMTP

Unit processes/Materials production/Plastics
CN - China
Reference year: 2005 -

There are many technical combinations of coal to polypropylene: according to the feeding method, it can be divided into two categories: wet feed gasification and dry feed gasification. The typical representatives of wet feed gasification are GE and multi nozzle coal water slurry gasification processes, while the typical representatives of dry feed gasification are She11, GSP, HT-L (aerospace powder coal pressurized gasification) processes, etc; The methanol synthesis process can be divided into high-pressure method, medium pressure method, and low-pressure method according to the different synthesis pressures; The methanol to polypropylene process can be divided into MTO process and MTP process based on the different main products. Different process combinations can bring different environmental impacts. The HDDMTO process mainly produces polyethylene and polypropylene, with by-products such as C4+and methyl tert butyl ether (MTBE) The Life Cycle Inventory (LCI) data for Coal to Polypropylene includes both foreground and background data. Users should refer to production data from coal-to-olefin enterprises to obtain foreground data, while background data involves consumption of raw materials, materials, energy, and pollutant emissions. The LCI of the coal extraction phase is derived from the Beijing University of Technology database, accounting for a national average loss rate of 15% during the washing and selection process; washing is necessary for raw coal but not for fuel coal. This study applies carbon allocation, where products with higher carbon content have greater allocation coefficients. The functional unit is defined as 1 tonne of coal-based polypropylene product. The study adopts a 'cradle-to-gate' scope, including nine stages (coal mining and washing, coal transportation, auxiliary materials supply, electricity supply, coal gasification, low-temperature methanol washing, methanol production, polyolefin production, and utilities) and excludes infrastructure construction, product packaging, transportation, use, and disposal processes.

Process type
LCI modeling approach
Multifunctional modeling
Aggregation type
Data provider
Review status
Tiangong LCI Data Working Group