substance

Nitrogen

Formula: N2
CAS: 7727-37-9
InChIKey: IJGRMHOSHXDMSA-UHFFFAOYSA-N
ChEBI: CHEBI:17997

Show in the process graph →

Made by

Cryogenic air separation unit (500 t/d GOX)Co-productScreening · level Balanced · not reviewed

Used by

Chloromethane from methanol and hydrogen chloride (gas-phase hydrochlorination, 100 kt/a)FeedstockConcept · not reviewed
N,N-Dimethylformamide by carbonylation of dimethylamine (50 kt/a, sodium methoxide in methanol)FeedstockConcept · not reviewed
Hydrazine hydrate by the peroxide process (PCUK, methyl ethyl ketazine route, 16 kt/a)UtilityConcept · not reviewed

Emitted by

Cryogenic air separation unit (500 t/d GOX)EmissionScreening · level Balanced · not reviewed
Chloromethane from methanol and hydrogen chloride (gas-phase hydrochlorination, 100 kt/a)EmissionConcept · not reviewed
N,N-Dimethylformamide by carbonylation of dimethylamine (50 kt/a, sodium methoxide in methanol)EmissionConcept · not reviewed
Hydrogen peroxide by the anthraquinone autoxidation process (50 kt/a H2O2, 50 wt%)EmissionConcept · not reviewed
Hydroxylammonium sulfate by catalytic NO hydrogenation (30 kt/a NH2OH, 25 wt% solution)EmissionConcept · not reviewed
Weak nitric acid by dual-pressure ammonia oxidation (1000 t/d HNO3 as 60 wt% acid)EmissionConcept · not reviewed
Sulfuric acid from sulfur burning, double contact / double absorption (1000 t/d, 98.5 wt%)EmissionConcept · not reviewed

Takes part in

2N₂Ogives2N₂+O₂Product · one process
N₂+3H₂in equilibrium with2NH₃Reactant · one process
2NH₃givesN₂+3H₂Product · one process
4C₅H₉NO+27O₂gives20CO₂+18H₂O+2N₂Product · one process
4CHN+5O₂gives4CO₂+2H₂O+2N₂Product · one process
4NH₃+3O₂gives2N₂+6H₂OProduct · Ammonia oxidation to nitrogen (side reaction) · 4 processes
4NO+4NH₃+O₂gives4N₂+6H₂OProduct · one process
2NH₃+2H₂O₂+C₄H₈OgivesN₂+C₄H₁₀O+4H₂OProduct · one process
N₂+2O₂gives2NO₂Reactant · NOx formation (fuel and thermal, as NO2) · one process

Routes compared

All 2 ways to make Nitrogen, with filters →

Not comparable as they standReference product (grade, state): differs. The rows say which route each warning concerns.

Per 1 kg of Nitrogen: 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
Cryogenic air separation unit (500 t/d GOX)cryogenic double-column air separation, 500 t/d GOX, pumped liquid products, TSA front endnitrogen/gan-8barg-10ppm	flowsheet or hand-writtenDesign maturity: Screening (research)Not independently reviewedDataset review: not stated	generic, 2026	a co-product of a multi-output dataset (product:GOXP, product:LOX, product:LIN besides it): its share needs the allocation of the LCI database build			no footprint	Reference product (grade, state): product is nitrogen/gan-8barg-10ppm (basis mole, component N2, phase gas, pressure 9.0, purity 0.999771, temperature 40.0); the routes state nitrogen/gan-8barg-10ppm (basis mole, component N2, phase gas, pressure 9.0, purity 0.999771, temperature 40.0), nitrogen/lin (basis mole, component N2, phase liquid, pressure 5.2, purity 0.999202, temperature -181.0)
Cryogenic air separation unit (500 t/d GOX)cryogenic double-column air separation, 500 t/d GOX, pumped liquid products, TSA front endnitrogen/lin	flowsheet or hand-writtenDesign maturity: Screening (research)Not independently reviewedDataset review: not stated	generic, 2026	a co-product of a multi-output dataset (product:GOXP, product:GANP, product:LOX besides it): its share needs the allocation of the LCI database build			no footprint	Reference product (grade, state): product is nitrogen/lin (basis mole, component N2, phase liquid, pressure 5.2, purity 0.999202, temperature -181.0); the routes state nitrogen/gan-8barg-10ppm (basis mole, component N2, phase gas, pressure 9.0, purity 0.999771, temperature 40.0), nitrogen/lin (basis mole, component N2, phase liquid, pressure 5.2, purity 0.999202, temperature -181.0)

How comparability is checked

Allocation: same (same allocation method: exergy)
Background data (impacts): not applicable (same background data and boundary behind the impact numbers (only routes with a footprint))
System boundary: same (same system boundary of the inventory (the dataset's boundary): gate-to-gate foreground of the plant with its construction)
Data quality (TfS DQR): same (data quality: every route states a TfS DQR, none more than 1 above the best)
Functional unit: same (same functional unit (amount and unit of the reference product): 1 kg)
Reference product (grade, state): differs (same reference product: registry grade and state: nitrogen/gan-8barg-10ppm (basis mole, component N2, phase gas, pressure 9.0, purity 0.999771, temperature 40.0), nitrogen/lin (basis mole, component N2, phase liquid, pressure 5.2, purity 0.999202, temperature -181.0))
System model: same (same system model (docs/system-model.md): cutoff)

Market activity in the LCI database: market:nitrogen/lin:RER (production-mix, RER), market:nitrogen/gan-8barg-10ppm:RER (production-mix, RER). Link a consumer of Nitrogen to the market rather than to one route.

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.