BharatNotes What is Coal Gasification?
Coal gasification is a thermo-chemical conversion in which solid coal or lignite is reacted at high temperature with a limited supply of oxygen and steam to produce synthesis gas (syngas) — a mixture dominated by carbon monoxide (CO) and hydrogen (H2), with some carbon dioxide (CO2) and methane (CH4). Unlike combustion, where coal is fully burnt for heat, gasification only partially oxidises the coal so that the carbon and hydrogen are captured in a chemically useful gas. This syngas becomes a versatile feedstock for urea, methanol, ammonia, synthetic natural gas (SNG), hydrogen and dimethyl ether.
There are two broad routes:
- Surface gasification — coal is gasified in engineered reactors above ground (the route India's current schemes back).
- Underground / in-situ gasification (UCG) — oxidants are injected into unmineable seams and syngas drawn out via wells, reducing surface ash and tar handling but raising risks of land subsidence and groundwater contamination.
Why It Matters for India
India's strategic case rests on import substitution. Government data cited with the 2025 scheme note India imports LNG (>50%), urea (~20%), ammonia (~100%) and methanol (~80–90%) (PIB/PMO, May 2025). Domestic gasification of abundant coal could reduce this dependence and strengthen energy security.
Government Schemes and Targets
India's stated goal is to gasify 100 MT of coal by 2030 (National Coal Gasification Mission framework, 2021). Two incentive schemes anchor this:
| Scheme | Approved | Outlay | Key features |
|---|---|---|---|
| PSU + Private gasification (3 categories) | January 2024 | ₹8,500 crore | Cat I PSUs ₹4,050 cr; Cat II PSU/private ₹3,850 cr; Cat III demonstration/small-scale ₹600 cr |
| Surface Coal/Lignite Gasification | 13 May 2025 | ₹37,500 crore | Targets ~75 MT gasification; incentive up to 20% of plant & machinery cost, paid in four milestone-linked instalments |
The flagship demonstration project is Talcher Fertilizers Ltd (Odisha) — India's first coal-gasification-based ammonia-urea plant, a JV of GAIL, Coal India, RCF and FCIL, designed for ~12.7 lakh tonnes of urea per year and reported over 70% complete (as of news reports, 2025), with commissioning pushed to around 2027.
The Environmental Trade-off
Gasification is promoted as "clean coal", but it is energy- and water-intensive and CO2-heavy. A Centre for Science and Environment (CSE) assessment has argued that coal gasification can emit more CO2 than a conventional coal thermal plant. The technology only becomes climate-defensible if combined with Carbon Capture, Utilisation and Storage (CCUS) — yet India currently has no commercial-scale CCUS facility (as of 2026). This tension between energy security and decarbonisation is the analytical heart of any GS3 answer on the topic.
UPSC Angle
Treat coal gasification as a bridge concept linking energy security, fertiliser self-reliance and climate policy. Remember the syngas composition (CO + H2), the 100 MT-by-2030 target, the ₹37,500 crore (2025) and ₹8,500 crore (2024) schemes, and the CCUS dependency. Foundation concept — no direct verified PYQ; underpins questions on the energy security and clean-coal/energy-transition family.
