Process information
| Key Data Set Information | |
| Location | LZ-GS-CN |
| Geographical representativeness description | Yuheng Industrial Zone, Yulin City, Shaanxi Province |
| Reference year | 2021 |
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| Use advice for data set | When using this data set for Life Cycle Assessment, attention should be paid to the specifics of the high temperature steam cracking technology and the subsequent separation processes described. This includes the HQF-IV type cracking furnace and the pre-deethanizer hydrogenation technology utilized for the separation of ethylene. Users should consider this process a 'black box' and recognize that the production of larger hydrocarbons through superposition and condensation reactions is part of the described method. It is imperative to apply quality allocation when assessing outputs, defining 1 ton of industrial-grade ethylene as the functional unit. Adjustments may be needed based on the actual application of the ethylene produced and local technological variations. |
| Technical purpose of product or process | Ethylene is a widely used chemical building block in the petrochemical industry, essential for the production of polymers and chemicals. Hence, this data set represents the production of 800,000 tons/year of industrial-grade ethylene through the natural gas ethane to ethylene route, utilizing CNPC's high temperature steam cracking technology. This process is commonly applied in large-scale synthesis for manufacturing products such as plastics, antifreeze, solvents, and detergents. |
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| General comment on data set | 800,000 tons/year ethylene, CNPC ethylene project, natural gas-based ethane to ethylene, CNPC's independent ethane to ethylene high temperature steam cracking technology |
| Copyright | No |
| Owner of data set | |
| Quantitative reference | |
| Reference flow(s) | |
| Functional Unit | Define 1t of industrial grade ethylene product as a functional unit |
| Time representativeness | |
| Time representativeness description | Not mentioned, replaced by the publication time of the document |
| Technological representativeness | |
| Technology description including background system | The model of ethylene production from natural gas based on ethane adopts the high-temperature steam cracking technology of my country National Petroleum Corporation from ethane to ethylene. The cracking process is a process in which ethane is decomposed under the condition of isolation from air and high temperature to generate alkenes or alkanes. During this process, there are superposition and condensation reactions at the same time, so that some hydrocarbons become larger molecules. The ethylene plant is divided into a cracking furnace unit (including raw material preheating, cracking in the furnace), a quenching unit (quick cooling stage, decoking system, process water stripping, dilution steam), compression and alkali cleaning unit (compression stage, alkali cleaning stage, pre- deethanization, acetylene hydrogenation), cold separation unit (cryogenic system, demethanization unit, methanation reaction), ethylene rectification and heat pump unit (heat pump unit, propylene refrigeration unit), spent alkali oxidation unit (waste alkali dehydrocarbonation , waste caustic oxidation, spent caustic neutralization) and torches, public works systems, etc. |
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Modelling and validation
Administrative information
Inputs and Outputs