Cradle to Consumer
Identity ID
24b4abac-fc57-46b7-8b2c-e464a9ef8acb
Materials
Associated ID
2c449ca5-8d68-4110-afbe-c9e91bc4563a
Included activities starts
Included activities ends
Description
This dataset is a market dataset, representing the consumption market of the region; the dataset includes the transport of the product from the gate to the consumer end, and the transport service is calculated according to the transport situation of this product in this region. Propylene is mainly used for polypropylene production, and is also used in the propylene oxide, acrylonitrile, isopropanol and acrylic acid industrial chains; it is an important raw material for basic petrochemicals; Propylene is modelled as a pure substance; when modelling this substance the user needs to add a solvent of their choice in the model; the dataset contains the main raw and auxiliary materials, energy, waste and atmospheric emissions of the production process, in which the preliminary treatment of wastewater in the auxiliary units and the waste gas treatment process are included within the dataset boundary, and infrastructure such as the manufacture of production equipment and the construction of plant buildings 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 feedstock cracking, separation and waste heat recovery; the dataset contains multiple products, allocated by mass.
Activity Description
The production activities of this product include raw material cracking, separation, waste heat recovery and other processes.
Process Description
The chemical formula of propylene is C3H6 (CAS No. 115-07-1), which is a light olefin. It is a colorless flammable gas at room temperature. It contains carbon-carbon double bonds in the molecule and has high polymerization and addition reaction activity. Industrial deliveries often focus on purity, moisture, sulfur and oxygenated impurity control to meet polymer grade and chemical grade application requirements. Propylene is mainly used in the production of polypropylene, and is also used in the propylene oxide, acrylonitrile, isopropyl alcohol and acrylic acid industry chains. It is an important raw material for basic petrochemicals.
Time period
2016
2026
Geography
China,Shanghai
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
This dataset models a feedstock mix of naphtha, propane, and liquefied petroleum gas. At 800-900°C in a cracking furnace, longer-chain saturated hydrocarbons are broken down into shorter unsaturated compounds. The main products include ethylene and propylene, with hydrogen, mixed C4 hydrocarbons, and other co-products. Cracking-unit designs are broadly similar and require only minor modifications for local conditions. Naphtha remains the principal feedstock, although the shares of light components such as propane and butane and liquid feedstocks such as liquefied petroleum gas have increased in recent years. A portion of the by-product fuel gas is used in the cracking furnaces.
1. Cracking: Feedstocks entering the plant are preheated, mixed with dilution steam, and heated before cracking in the radiant section of the furnace. Liquid-feed furnaces use highly selective radiant coils for high-severity cracking, while gas-feed furnaces use multi-pass coils. Cracked gas is sent to the downstream separation section. Both liquid- and gas-feed furnaces are bottom-fired.
2. Separation: Heat is recovered from the cracked gas in a waste-heat boiler, after which the gas serves as stripping medium in the gasoline fractionator. The fractionator bottoms leave the plant as crude fuel oil, while the overhead stream is quenched in a quench-water tower and sent to compression. The demethanizer bottoms are sent to the deethanizer, and the deethanizer overhead enters an acetylene converter, where acetylene is selectively hydrogenated to ethylene and ethane.