substance

Hydrogen iodide

Hydriodic acid is its solution in water; a flow of acid says its concentration.

Formula: HI
CAS: 10034-85-2
InChIKey: XMBWDFGMSWQBCA-UHFFFAOYSA-N
ChEBI: CHEBI:43451

Show in the process graph →

Made by

Anhydrous hydrogen iodide by gas-phase catalytic synthesis from hydrogen and iodineMain 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.

Takes part in

I₂+SO₂+2H₂Ogives2HI+H₂SO₄Product · Reduction of the blown-out iodine by sulfur dioxide (T-202) · one process
2HI+Cl₂gives2HCl+I₂Reactant · Liberation of iodine from the recycled hydriodic acid (R-101) · one process
HI+NaOHgivesNaI+H₂OReactant · Neutralisation of the residual hydriodic acid of the spent brine (R-401) · one process

Routes compared

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

Per 1 kg of Hydrogen iodide: 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
Anhydrous hydrogen iodide by gas-phase catalytic synthesis from hydrogen and iodinecontinuous gas-phase reaction of hydrogen with iodine vapour over a supported metal catalyst (platinum or nickel on alumina in the sources), about 300 to 350 degC near atmospheric pressure; the hydrazine, hydrogen sulfide, red phosphorus and aqueous (hydriodic acid) routes are not modelled	Tier 0 (stoichiometric)Design maturity: Concept (research)Not independently reviewedDataset review: unreviewed	GLO, 2008	Electricity: 0.333 kWh Heat from fossil fuel (iodine melting, vaporisation, preheating, distillation): 0.556 kWh	Hydrogen: 0.00805 kg Iodine: 1.01 kg	Hydrogen, unconverted, to air: 0.000169 kg Iodine, to air: 0.00203 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.