Hydrazine hydrate (64 wt% N2H4)

Activity Hydrazine hydrate by the peroxide process (PCUK, methyl ethyl ketazine route, 16 kt/a), GLO: the inventory of 1 kilogram of its reference product, attributional, cut-off.

Calculation maturity: not assessed Design maturity: Concept (research)Not independently reviewedhydrazine-1:hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process:product:HHPreliminaryReport a problem with this dataset

Research outputAn inventory from a research design at the design maturity its process states, not verified plant data: check its calculation maturity and review status before use. Background activities are referenced by name only; no background data is included. All caveats

What it is

Unallocated foreground LCI of Hydrazine hydrate by the peroxide (PCUK, methyl ethyl ketazine) process, case design, derived from the flowsheet by cheme assess lca.

Reference product: 1 kilogram of Hydrazine hydrate (64 wt% N2H4) (3 bar(a), 40 degC, 64 % N2H4 (mass))
Chemical: hydrazine
CAS: 302-01-2
Code: hydrazine-1:hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process:product:HH
Dataset: hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process version 0.1.0 · UUID bdf2bd74-0598-56c6-8f37-3cc200c7fc40
Activity UUID: not available (the library assigns none; use the code)
Database: cheme-as-code-atlas-preview-c3ab348 (version preview-c3ab348)
Process: Hydrazine hydrate by the peroxide process (PCUK, methyl ethyl ketazine route, 16 kt/a)
Geography: GLO · background inputs with a site rule link at the user's site location (default DE)
Time period: 2026 · valid until 2031
Technology: ammonia oxidation by hydrogen peroxide in the presence of methyl ethyl ketone in an activated (acetamide/ammonium acetate, phosphate) working solution at 323 K, azine decantation and distillation, working-solution regeneration by evaporation at 453 K with ammonia recovery, azine hydrolysis by reactive distillation at about 900 kPa(a), hydrate concentration; 16 kt/a hydrazine hydrate (10.2 kt/a N2H4), concept design · level current
Boundary: gate-to-gate foreground of the plant
Production volume: 16,000,000 kg/a (product:HH per hour x operation.hours_per_year (8000 h/a))
Classification: ISIC Rev.4 2011 (taxonomy/families.yaml (ISIC Rev.4) of the process's families)
System model: attributional, cut-off (docs/system-model.md, methodology 1.1.0)
Allocation: mass, 100 % of the dataset to this product (rule single-output, from default)
one product: nothing to allocate
Rights: CC-BY-4.0: the ChemE-as-Code process library's own concept design (LICENSE-DATA)

Exchanges per 1 kilogram of Hydrazine hydrate (64 wt% N2H4)

As exported: allocated and scaled to the reference product. Provenance: 17 assumed. Pedigree scores (1 best, 5 worst): reliability, completeness, temporal correlation, geographical correlation, further technological correlation.

Preliminary6 exchanges are not yet linked to a background dataset. They count no burden, so the inventory is incomplete: do not read a result from it as complete.

Input	Amount	Unit	Provenance	Pedigree	Linked to
Hydrogen peroxide 70 wt% (hydrogen-peroxide-1) feed:H2O2 hydrogen peroxide S01 (D-003, D-004); D-004 yield 0.85 ASSUMED, sensitivity 0.81-0.95 in DESIGN.md D-004 From stream S01	1.147	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Ammonia liquid (ammonia-1) feed:NH3F ammonia S02 (D-004, D-008) From stream S02	0.724	kilogram	assumed	4 4 1 3 3	Atlas (pinned): Ammonia from natural gas (1500 t/d, steam reforming with air-fed secondary reformer, Haber-Bosch loop) (Liquid ammonia product (refrigerated, to the battery limit), NL) compatible: grade the input names no chemical only; ammonia (Liquid ammonia product (refrigerated, to the battery limit)) is taken; unit kilogram; system model cutoff (one database); allocation exergy (deviation); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
MEK make-up feed:MEKF MEK make-up S03 (D-004, D-008) From stream S03	0.07872	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Nitrogen for headspace inerting feed:N2F N2 sweep of the reactor and decanter headspaces S04 (D-015, ASSUMED: O2 at most 8 mol% in the vent) From stream S04	0.3169	kilogram	assumed	4 4 1 3 3	market for nitrogen, liquid (nitrogen, liquid, RER) in your background (default ecoinvent-3.11-cutoff) or in the Atlas (market): market for nitrogen, gaseous, <= 10 ppm O2, 8 barg (Nitrogen, gaseous, <= 10 ppm O2, 8 barg, RER) compatible: grade nitrogen/gan-8barg-10ppm (Nitrogen, gaseous, <= 10 ppm O2, 8 barg); unit kilogram; system model cutoff (one database); allocation exergy (physical-exergy); boundary delivered (production-mix, RER: transport and losses included) plant behind it: Nitrogen, gaseous, <= 10 ppm O2, 8 barg
Acetic acid make-up feed:ACOHF acetic acid make-up S10 (D-005) From stream S10	0.04819	kilogram	assumed	4 4 1 3 3	Atlas (pinned): Acetic acid by low-water iridium methanol carbonylation (60 t/h glacial acid, concept) (Glacial acetic acid to storage, GLO) compatible: grade the input names no chemical only; acetic-acid (Glacial acetic acid to storage) is taken; unit kilogram; system model cutoff (one database); allocation none (single-output); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
Disodium phosphate make-up feed:PHOSF phosphate make-up S11 (D-005) From stream S11	0.00241	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Demineralised water feed:DW hydrolysis make-up water S40 (D-007) From stream S40	1.45	kilogram	assumed	4 4 1 3 3	market for water, deionised (water, deionised, RoW) in your background (default ecoinvent-3.11-cutoff)
Electric power feed:POWER agitators and pumps Q01, Q02 (D-010, ASSUMED hand estimate) electricity From streams Q01, Q02	0.05	kilowatt hour	assumed	4 4 1 3 3	market for electricity, medium voltage (electricity, medium voltage, DE, site location) in your background (default ecoinvent-3.11-cutoff)
MP steam 2000 kPa(a) feed:MPS regeneration, azine and hydrolysis column reboilers Q03-Q05 (D-010). A LOWER BOUND: the hydrolysis column C-401 (Q05) leaves out the endothermic hydrolysis heat and assumes reflux 1; its high variant (reflux 2.5, 25-75 kJ/mol azine, ASSUMED) adds 1.7-2.2 MW, i.e. MP steam up to about 7.3 kWh instead of 6.2 kWh per kg hydrate (+18 %), until the column can be simulated (I-02) steam, MP, 212.35 degC, 20 bar(a) From streams Q14, Q03, Q04, Q05	6.208	kilowatt hour	assumed	4 4 1 3 3	Atlas: heat from steam, per kWh (Atlas unit proxy) (heat from steam, by energy, GLO)
LP steam 500 kPa(a) feed:LPS ammonia recovery and concentration column reboilers Q06, Q07 (D-010) steam, LP, 151.83 degC, 5 bar(a) From streams Q06, Q07	1.992	kilowatt hour	assumed	4 4 1 3 3	Atlas: heat from steam, per kWh (Atlas unit proxy) (heat from steam, by energy, GLO)
2-Butanol bleed to incineration product:BUOHB 2-butanol bleed S33 (D-004, D-006) From stream S33	0.06178	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Pyrazoline purge to incineration product:HEAVY pyrazoline purge S46 (D-007) From stream S46	0.02815	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Working-solution purge to incineration product:WSP working-solution purge S15 (D-005) From stream S15	0.09962	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (no chemical slug or factor id); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Waste water to treatment product:WW regeneration water after ammonia recovery S24 (D-008); a hydrazine trace, peroxide residues and stabiliser are not modelled (D-014) From stream S24	2.2	kilogram	assumed	4 4 1 3 3	Atlas (plant): wastewater to treatment, per kg (Atlas unit proxy) (wastewater, by mass, GLO) compatible: grade the input names wastewater only; wastewater (Wastewater treated) is taken; unit kilogram; system model cutoff (one database); allocation mass (single-output); boundary plant gate of a site utility: no utility market yet (docs/markets.md)
Cooling water return product:CW heat to cooling water Q08-Q13 (D-010) cold, 25 degC From streams Q08, Q09, Q10, Q11, Q12, Q13	9.446	kilowatt hour	assumed	4 4 1 3 3	Atlas (plant): cooling water service, per kWh heat rejected (Atlas screening proxy) (heat rejected to cooling water, GLO) compatible: grade the input names cooling-water only; cooling-water (Heat rejected to cooling water, 25/35 degC) is taken; unit kilowatt hour; carrier cold, 25 degC from cold, 25 degC; system model cutoff (one database); allocation mass (single-output); boundary plant gate of a site utility: no utility market yet (docs/markets.md)

Elementary flows

Flow	Direction	Compartment	Amount	Unit	Provenance	Pedigree
Methyl ethyl ketone d3709c7e-7c61-45a4-92e4-f7cf95ebe3a2 From stream S07	emission	air	0.004789	kilogram	assumed	4 4 1 3 3
Ammonia 87883a4e-1e3e-4c9d-90c0-f1bea36f8014 From stream S07	emission	air	0.002262	kilogram	assumed	4 4 1 3 3

The streams are the plant's own flows: an amount here is allocated and per 1 kilogram of Hydrazine hydrate (64 wt% N2H4), so it differs from the stream's flow, and it can sum several streams.

Where these numbers come from: each exchange names its source above; the dataset is processes/hydrazine-1/lca/dataset.yaml in library version c3ab348.

Used by

No other activity of this database links to it.

How good it is

Review

Not reviewed: no LCI review record yet

Data quality

DQR 2.33 · PEF-style DQR 2.75

TeR 3 · GeR 3 · TiR 1 · P 4 · C 4 · weakest TeR · primary data 0 %

Mass and carbon closure

Assessed (lca/manifest.json balance, tolerance 5 %: design maturity concept (sourced screening))

lci-carbon-origin: closed
lci-element-balance: closed
lci-mass-balance: closed

Change report

Not available: this build has no change report against an earlier release.

KPI benchmark positions

Not available: no benchmarked KPI for this dataset.

How to use it

Downloads

cheme-as-code-atlas-preview-c3ab348.xlsx · bw2io ExcelImporter workbook (bw2io 0.9 Excel layout) · the whole database
code hydrazine-1:hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process:product:HH
cheme-as-code-atlas-preview-c3ab348-olca-jsonld.zip · openLCA JSON-LD (olca-schema) (2) · the whole database
process bdf2bd74-0598-56c6-8f37-3cc200c7fc40 (processes/bdf2bd74-0598-56c6-8f37-3cc200c7fc40.json)
cheme-as-code-atlas-preview-c3ab348-multifunctional.json · Brightway 2.5 multifunctional database (JSON, for the multifunctional package) (cheme-as-code/lci-multifunctional/v1) · the whole database
code hydrazine-1:hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process:product:HH
cheme_as_code_lci-0.1.0-py3-none-any.whl · the installer

A file with this activity alone is not available: each file above is the whole database, and the line under it says how to find this activity there.

import bw2data as bd
from cheme_as_code_lci import install

bd.projects.set_current("my-project")   # holds your licensed background + biosphere3
install("cheme-as-code-atlas-preview-c3ab348.xlsx", background="ecoinvent-3.11-cutoff", location="DE")
activity = bd.get_activity(("cheme-as-code-atlas-preview-c3ab348", "hydrazine-1:hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process:product:HH"))

While any exchange of the database has no mapping, install() writes nothing and only lists the unlinked exchanges. So the last line finds no activity until the gaps are mapped: the download section gives the ways to use the database now.

How to cite

Hydrazine hydrate (64 wt% N2H4), from Hydrazine hydrate by the peroxide process (PCUK, methyl ethyl ketazine route, 16 kt/a) (dataset hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process 0.1.0), ChemE-as-Code Process Atlas LCI database preview-c3ab348, activity hydrazine-1:hydrazine-hydrate-by-the-peroxide-pcuk-methyl-ethyl-ketazine-process:product:HH. Cite the Process Atlas paper (in preparation, 2026), by Artur M. Schweidtmann and Jana M. Weber, and the ChemE-as-Code Process Atlas LCI database version preview-c3ab348.

DOI: none yet (the Process Atlas paper is in preparation)

For the data, cite the Process Atlas paper; for the platform that builds and checks it, the ChemE-as-Code paper.

Schweidtmann, A. M. & Weber, J. M. (2026, in preparation). Process Atlas: an open, git-native, reproducible library and life cycle inventory of chemical processes (working title).

BibTeX

@unpublished{schweidtmann_process_atlas,
  author = {Schweidtmann, Artur M. and Weber, Jana M.},
  title = {{Process Atlas: an open, git-native, reproducible library and life cycle inventory of chemical processes (working title)}},
  year = {2026},
  url = {https://atlas.cheme-as-code.org},
  note = {in preparation}
}

Schweidtmann, A. M. (2026, in preparation). ChemE-as-Code: An Open-Source Platform for AI-Accelerated Chemical Process Engineering (working title).

BibTeX

@unpublished{schweidtmann_cheme_as_code,
  author = {Schweidtmann, Artur M.},
  title = {{ChemE-as-Code: An Open-Source Platform for AI-Accelerated Chemical Process Engineering (working title)}},
  year = {2026},
  url = {https://cheme-as-code.org},
  note = {in preparation}
}