Diethylene glycol to storage

Activity Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG), GLO: the inventory of 1 kilogram of its reference product, attributional, cut-off.

Calculation maturity: not assessed Design maturity: Concept (research)Not independently reviewedethylene-glycol-1:ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg:product:DEGPreliminaryReport 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 Ethylene glycol by ethylene oxide hydration (glycols only, 50 t/h MEG), case design, derived from the flowsheet by cheme assess lca.

Reference product: 1 kilogram of Diethylene glycol to storage (3 bar(a), 40 degC, 99.5907 % DEG (mass))
Chemical: diethylene-glycol
CAS: 111-46-6
Code: ethylene-glycol-1:ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg:product:DEG
Dataset: ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg version 0.1.0 · UUID a894f803-0935-5bfb-9310-41cdf6beff87
Activity UUID: not available (the library assigns none; use the code)
Database: cheme-as-code-atlas-preview-c3ab348 (version preview-c3ab348)
Process: Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG)
Geography: GLO · background inputs with a site rule link at the user's site location (default DE)
Time period: 2026 · valid until 2031
Technology: EO/EG glycols-only plant: O2-based EO reactor (silver catalyst, methane ballast), water absorption of EO, hot potassium carbonate CO2 removal, thermal hydration (water:EO 20 mol/mol), 4-effect evaporation, vacuum MEG/DEG/TEG columns; 50 t/h MEG · level current
Boundary: gate-to-gate foreground of the plant
Production volume: 400,000,000 kg/a (product:MEG 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, 7.7 % of the dataset to this product (rule deviation, from study)
Physical (mass) allocation in place of the price ratio of the hierarchy: no open price of MEG, DEG and TEG is recorded yet (registry has no glycol entries); DEG is 7.7 % of the product mass, TEG 0.3 %. To revisit with open prices (D-010).
Rights: CC-BY-4.0: the ChemE-as-Code process library's own concept design (LICENSE-DATA)

Exchanges per 1 kilogram of Diethylene glycol to storage

As exported: allocated and scaled to the reference product. Provenance: 14 assumed. Pedigree scores (1 best, 5 worst): reliability, completeness, temporal correlation, geographical correlation, further technological correlation.

Preliminary4 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
Ethylene (pipeline polymer grade) feed:ETH stream S1 (scripts/eg_balance.py, D-006) From stream S1	0.548	kilogram	assumed	4 4 1 3 3	Atlas (pinned): Ethylene and propylene by ethane steam cracking (1000 kt/a ethylene, concept) (Polymer-grade ethylene, GLO) compatible: grade the input names no chemical only; ethylene (Polymer-grade ethylene) is taken; unit kilogram; system model cutoff (one database); allocation mass (deviation); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
Oxygen (pipeline GOX from asu-1) feed:OXY stream S2 (D-003, D-006) From stream S2	0.5434	kilogram	assumed	4 4 1 3 3	Atlas (pinned): Cryogenic air separation unit (500 t/d GOX) (Oxygen, gaseous, >= 99.5 mol%, 30 barg, GLO) compatible: grade the input names oxygen only; oxygen/gox-30barg-99.5 (Oxygen, gaseous, >= 99.5 mol%, 30 barg) is taken; unit kilogram; system model cutoff (one database); allocation exergy (physical-exergy); boundary plant gate (pinned): no distribution or losses; the consumer's dataset counts its delivery
Methane ballast make-up feed:MET stream S3: methane lost with the purge and the CO2 vent (D-006) From stream S3	0.009254	kilogram	assumed	4 4 1 3 3	unlinked unlinked, no technosphere mapping: no mapping (chemical 'methane'); add it to lci/mappings.yaml technosphere or to the process's lca/mappings.yaml exchanges
Process water make-up (demineralised) feed:PW stream S22: hydration water and the bleed less the combustion water (D-006) From stream S22	0.212	kilogram	assumed	4 4 1 3 3	market for water, deionised (water, deionised, RoW) in your background (default ecoinvent-3.11-cutoff)
MP steam 2800 kPa(a) import feed:MPS Q4-Q8 and Q23: MP steam import to the first evaporator effect (top-up), the glycol reactor feed heater and the drying and glycol column reboilers, net of the 66.3 MW steam raised in R-101 (reaction heat less the gas heating across the reactor) and used in the plant (D-008) steam, MP, 230.45 degC, 28 bar(a) From streams Q4, Q5, Q6, Q7, Q8, Q23	1.01	kilowatt hour	assumed	4 4 1 3 3	Atlas: heat from steam, per kWh (Atlas unit proxy) (heat from steam, by energy, GLO)
Electric power feed:POWER Q9 (K-101) + Q10 (P-202) + Q11 (P-401) + Q12 (auxiliaries, ASSUMED 20 kWh/t), D-008 electricity From streams Q9, Q10, Q11, Q12	0.1244	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)
Heavy glycols residue (to sale or incineration) product:HVY stream S37 (D-006) From stream S37	2.686e-4	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
Inerts purge to the fuel gas header product:PURGE stream S16: 0.15 % of the recycle gas (D-004) From stream S16	0.02358	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
Recycle water bleed to biological treatment product:WW stream S31: 0.5 % bleed of the recycle water (D-005) From stream S31	0.02805	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 Q13-Q22 (D-008) cold, 25 degC From streams Q13, Q14, Q15, Q16, Q17, Q18, Q19, Q20, Q21, Q22	3.144	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)
Silver EO catalyst on alumina (replacement charge, averaged) consumable:eo-catalyst DESIGN.md D-010; ASSUMED 0.2 kg/t EO inside BREF LVOC 2017 7.3.6.3 (0.12-0.8 kg/t EO spent catalyst)	1.44e-4	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

Elementary flows

Flow	Direction	Compartment	Amount	Unit	Provenance	Pedigree
Ethylene 90f722bf-cb9b-571a-88fc-34286632bdc4 From stream S21	emission	air	3.598e-4	kilogram	assumed	4 4 1 3 3
Methane, fossil 70ef743b-3ed5-4a6d-b192-fb6d62378555 From stream S21	emission	air / non-urban air or from high stacks	3.598e-4	kilogram	assumed	4 4 1 3 3
Carbon dioxide, fossil aa7cac3a-3625-41d4-bc54-33e2cf11ec46 From stream S21	emission	air / non-urban air or from high stacks	0.2529	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 Diethylene glycol to storage, 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/ethylene-glycol-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: not-assessable
lci-element-balance: not-assessable
lci-mass-balance: closed

element balance not assessable: no composition for consumable:eo-catalyst (no composition), disposal:consumable.eo-catalyst (no composition)
carbon balance not assessable: no composition for consumable:eo-catalyst (no composition), disposal:consumable.eo-catalyst (no composition)

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 ethylene-glycol-1:ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg:product:DEG
cheme-as-code-atlas-preview-c3ab348-olca-jsonld.zip · openLCA JSON-LD (olca-schema) (2) · the whole database
process a894f803-0935-5bfb-9310-41cdf6beff87 (processes/a894f803-0935-5bfb-9310-41cdf6beff87.json) · the dataset's unallocated multi-output process; this product's allocation factor is in it
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 ethylene-glycol-1:ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg · the dataset unallocated, with all its products; this product is its desired_code
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", "ethylene-glycol-1:ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg:product:DEG"))

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

Diethylene glycol to storage, from Ethylene glycol by ethylene oxide hydration (glycols-only EO/EG plant, 1200 t/d MEG) (dataset ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg 0.1.0), ChemE-as-Code Process Atlas LCI database preview-c3ab348, activity ethylene-glycol-1:ethylene-glycol-by-ethylene-oxide-hydration-glycols-only-50-t-h-meg:product:DEG. 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}
}