Acetic acid: Emissions
Coal-based carbon monoxide can double the footprint
What this tab covers The greenhouse-gas footprint per tonne, split by lifecycle phase (feedstock, production, movement, use, end of life), the global total, other environmental impacts, levers and low-carbon routes, India's position, and where the investment opportunity lies. Emission intensity 2.40 t CO2e per t range 1.0-3.5 · 0.54 t methanol at the 2.6 t world average (methanol tile, IEA-derived), CO from gas or coal, plus steam; low end gas-based US Gulf, high end coal-based China Global emissions per year 43.0 Mt CO2e per year 2025 · 2.4 t x about 18 MtPer t of glacial acetic acid, cradle-to-gate. Intensity: derived from methanol tile (IEA 2023) and IRENA 2021 (indicative). Global total: derived (indicative).
Share of footprint by lifecycle phase
Feedstock 84% Production / process 13% Movement 3%Footprint by lifecycle phase
| Phase | Intensity | Share | Main sources of emissions | Notes | Source |
|---|---|---|---|---|---|
| Feedstock | about 2.0 t CO2e/t (methanol about 1.4, CO about 0.6) | 84% | coal gasification in China versus gas reforming elsewhere | coal-based CO can double this phase | derived (indicative) |
| Production / process | about 0.3 t CO2e/t | 13% | steam for distillation, power | low-water processes (AO Plus, Cativa) use less steam | indicative |
| Movement | about 0.05-0.1 t CO2/t | 3% | chemical tankers, heated ISO tanks | China to India about 6,000-8,000 km | indicative |
| Use | carbon mostly stays in VAM polymers, PET and cellulose acetate | – | ester solvents evaporate as VOCs | solvent VOCs form ozone and later CO2 | indicative |
| End of life | depends on derivative | – | PET recycling or incineration; cigarette filters litter | cellulose acetate filters are a major litter item | indicative |
Other environmental impacts
Corrosive spills; ester solvent VOCs; cellulose acetate cigarette filters as litter.
Levers to cut emissions
- Low-carbon methanol and CO (bio or e-methanol, captured CO2 to CO)
- Carbon capture on coal gasifiers supplying CO
- Low-water carbonylation to cut steam
- Renewable steam and power
India
India's acetic acid footprint is mostly embedded in Chinese coal-based imports. Reliance's planned 3 Mt plant would add a large domestic source whose intensity depends on how its CO and methanol are made (not published).
Emission figures are indicative global averages from the life-cycle studies named; actual footprints vary widely by site, energy mix and method.Low-carbon routes
| Route | Intensity | Cost premium | Status | Source |
|---|---|---|---|---|
| Acetic acid from recycled CO2 via methanol | lower; depends on hydrogen source | not published | Celanese announced capture of up to about 180 kt CO2 a year at Clear Lake to make methanol for its acetyls chain (indicative, from memory of 2023 announcements) | indicative |
| Bio-acetic acid by fermentation | low if bio-ethanol is low carbon (indicative) | large (indicative) | niche food and specialty markets | indicative |