mixture
Crude C4 cut
Steam-cracker C4 cut (butadiene, butenes, butanes); composition by feed and severity. No composition recorded yet: one goes in only with its source (docs/registry.md, Fuel mixtures).
Made by
- Ethylene and propylene by ethane steam cracking (1000 kt/a ethylene, concept)Co-productConcept · not reviewed
Used by
When a process with this chemical is added to the library, it appears here.
Routes compared
One route in the Atlas makes Crude C4 cut: nothing to compare yet. A comparison appears when a second route is added.
Per 1 kg of Crude C4 cut: inventory from each route's LCI dataset, unallocated; footprints per the functional unit of their own LCA.
| Route | Tier, design maturity, review status | Geography, year | Energy | Feedstocks | Key emissions | Footprint | Comparability |
|---|---|---|---|---|---|---|---|
| Ethylene and propylene by ethane steam cracking (1000 kt/a ethylene, concept)ethane steam cracking, 1000 kt/a ethylene, front-end demethaniser, tail-end acetylene hydrogenation | flowsheet or hand-writtenDesign maturity: Concept (research)Not independently reviewedDataset review: unreviewed | GLO, 2026 | a co-product of a multi-output dataset (product:ETHYLENE, product:PROPYLENE, product:PYGAS besides it): its share needs the allocation of the LCI database build | no footprint | – | ||
ISO 14044 requires a critical review (by a panel of interested parties, ISO/TS 14071) of a comparative assertion intended to be disclosed to the public. These routes are listed side by side for screening; a statement that one is better than another needs that review. None of these routes has had such a review.