mixture

NPK compound fertiliser

Compound fertiliser with nitrogen, phosphate and potash; the grade (N-P2O5-K2O, e.g. 15-15-15) and the salts depend on the route (nitrophosphate or mixed acid). No composition recorded yet: one goes in only with its source (docs/registry.md, Fuel mixtures).

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Made by

NPK 15-15-15 by the nitrophosphate (ODDA) route, with CNTH conversion to ammonium nitrate and limeMain productConcept · not reviewed

Used by

No process in the Atlas uses this yet.

When a process with this chemical is added to the library, it appears here.

Routes compared

One route in the Atlas makes NPK compound fertiliser: nothing to compare yet. A comparison appears when a second route is added.

Per 1 kg of NPK compound fertiliser: 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
NPK 15-15-15 by the nitrophosphate (ODDA) route, with CNTH conversion to ammonium nitrate and limenitrophosphate (ODDA) process: digestion in about 60 % HNO3, cooling crystallisation of calcium nitrate tetrahydrate, ammoniation of the nitrophosphoric acid, spherodiser or drum granulation; the mixed-acid route and CN fertiliser instead of conversion are not modelled	Tier 0 (stoichiometric)Design maturity: Concept (research)Not independently reviewedDataset review: unreviewed	RER, 2002	Natural gas (as methane), to heat the granulation and drying air: 0.0124 kg Electricity: 0.0795 kWh	Phosphate rock, sedimentary (model: fluorapatite, calcite, fluorite, silica): 0.447 kg Nitric acid, about 60 wt% (counted by mass of the acid): 1.02 kg Ammonia, liquid (cooling of the crystallisers, then neutralisation and conversion): 0.198 kg Potassium chloride (muriate of potash), taken as pure KCl: 0.237 kg Carbon dioxide from the ammonia plant, for the CNTH conversion: 0.151 kg Dolomite filler (stands for the unmodelled product components): 0.0999 kg Combustion oxygen, from ambient air: 0.0496 kg (free) Steam (pressure not stated; AN evaporation takes saturated steam up to 9 bar): 0.24 kg Compressed air: 0.038 Nm3	CO2, fossil: rock carbonate in the digestion and natural gas in the dryers: 0.0548 kg Water vapour: acid water, digestion and combustion water, less the water the conversion takes: 0.381 kg Ammonia to air: 0.000238 kg Fertiliser dust to air (size not stated): 0.000334 kg NOx to air, as NO2: 0.000312 kg Fluoride to air, as HF: 0.000028 kg Total nitrogen to water, as N: 0.00038 kg Phosphate to water, as P2O5: 0.00006 kg Fluoride to water, as F: 0.000135 kg	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.