Benzene: Emissions
Factory carbon, plus more if it is ever burnt
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 1.86 t CO2e per t range 1.4-2.5 (indicative, basis: route and allocation) · cradle-to-gate, Europe, data year 2009 Global emissions per year 102 Mt CO2e per year 2024 · 1.86 t CO2e/t x 55 Mt (indicative)Per t of benzene, cradle-to-gate. Intensity: Plastics Europe Public LCI Database via Climatiq. Global total: derived.
Share of footprint by lifecycle phase
Feedstock 38% Production / process 57% Movement 5%Footprint by lifecycle phase
| Phase | Intensity | Share | Main sources of emissions | Notes | Source |
|---|---|---|---|---|---|
| Feedstock | about 0.7 t CO2e per t (indicative) | 38% | Crude extraction, transport and refining allocated to naphtha | Higher for flared or heavy crudes | indicative split of Plastics Europe total |
| Production / process | about 1.0 t CO2e per t (indicative) | 57% | Reformer and cracker furnaces, extraction steam | Allocation among co-products is the main source of variance | indicative |
| Movement | about 0.05-0.1 t CO2e per t (indicative) | 5% | Tanker shipping, typically Korea to China | Small | indicative |
| Use | not applicable | – | Benzene is an intermediate | Benzene left in gasoline is burnt | n/a |
| End of life | up to 3.38 t CO2 per t of benzene carbon if burnt | – | Fate of derivatives (polystyrene, nylon, PU) | Benzene is 92.3% carbon by mass; derivatives are mostly landfilled or incinerated | stoichiometry |
Other environmental impacts
Carcinogenic exposure risk for workers and communities near refineries; fugitive VOC emissions; groundwater contamination from fuel leaks.
Levers to cut emissions
- Electrifying reformer and cracker furnaces
- Capturing CO2 from refinery hydrogen and furnaces
- Heat integration in extraction units
- Chemical recycling of polystyrene back to styrene, displacing benzene demand
- Bio-aromatics from lignin or biomass pyrolysis
India
India's benzene comes from refinery complexes (Reliance, IOCL, MRPL, BPCL); no product-specific footprint has been published. Refinery decarbonisation targets of the oil companies cover it indirectly.
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 |
|---|---|---|---|---|
| Bio-aromatics from biomass catalytic fast pyrolysis | not published | not published | pilot scale (e.g. Anellotech, indicative) | indicative |
| Methanol-to-aromatics using low-carbon methanol | depends on methanol source | not published | demonstration units in China (indicative) | indicative |