India’s Coal-Fired Power: Pathways to Cleaner Technologies in 2025

India’s coal-fired power plants, generating over 70% of the nation’s electricity, remain a cornerstone of its energy mix, despite a global push for renewables. As of August 8, 2025, soaring electricity demand—projected to double by 2030—has paused coal plant retirements, with 15.4 GW of new capacity planned by March 2025 and 90 GW by 2032. However, coal’s environmental toll, contributing 39% of India’s greenhouse gas emissions, necessitates cleaner technologies. Innovations like supercritical and ultra-supercritical units, biomass co-firing, and carbon capture, utilization, and storage (CCUS) offer pathways to decarbonize the sector, aligning with India’s climate commitments to reduce emissions intensity by 45% by 2030. This article explores the state of India’s coal power, cleaner technology options, challenges, and their role in balancing energy security with sustainability, drawing on recent analyses and sentiments from platforms like X.

The Coal Conundrum: Energy Demand vs. Environmental Impact

India’s electricity demand has surged, growing over 9% from 2021 to 2025, surpassing earlier 6.6% forecasts. Coal-fired plants, with a 221-GW capacity in 2025, produce over 70% of electricity, a figure unchanged since the 2000s. This reliance stems from:

• Economic Growth: Sustained GDP growth and post-COVID recovery drive power needs, with FY27 demand projections met in 2025.

• Energy Security: Coal ensures baseload stability, unlike intermittent renewables, critical to avoid blackouts, as noted by expert Anjan Kumar Sinha.

• Environmental Cost: Electricity generation accounts for 40% of India’s carbon emissions, with coal plants emitting up to 1 tonne/MWh in some cases.

The National Electricity Plan (NEP) targets a coal capacity increase to over 280 GW by 2032, despite earlier plans to phase down. This pivot, driven by record power demand and heatwaves, underscores the urgency of cleaner coal technologies to meet climate goals while supporting Atmanirbhar Bharat (self-reliant India).

Cleaner Technologies in Focus

Several technologies are being explored to reduce coal’s environmental footprint:

1. Supercritical and Ultra-Supercritical Plants

• Overview: Unlike subcritical plants (80% of India’s coal fleet, averaging 32% efficiency), supercritical and ultra-supercritical units achieve 40% and 44% efficiency, respectively, reducing coal use and emissions per MWh. All new capacity under construction employs these technologies.

• Progress: India began transitioning to supercritical units in the mid-2010s, with NTPC’s 1,320-MW Khargone plant (2019) as the first ultra-supercritical unit. However, only 166 of 455 subcritical units exceed the 32% efficiency benchmark, and newer units often underperform, emitting over 1 tonne/MWh.

• Potential: Upgrading subcritical plants or prioritizing supercritical units could cut emissions by 10–15%, per the Centre for Science and Environment (CSE). Systemic reforms in dispatch and generation practices are needed to maximize efficiency.

2. Biomass Co-Firing

• Overview: Mixing biomass (e.g., agricultural residue) with coal reduces emissions and addresses crop-burning pollution. NTPC’s Tanda unit successfully co-fired 20% biomass, a scalable model.

• Impact: CSE estimates nationwide adoption could reduce emissions by 433 million tonnes annually, surpassing the combined emissions of India’s iron, steel, and cement sectors. Delhi and nearby plants have adopted this, but national rollout lags due to supply chain and regulatory gaps.

• Challenges: Biomass availability, storage, and consistent quality require investment, as noted by CSE’s Parth Kumar.

3. Carbon Capture, Utilization, and Storage (CCUS)

• Overview: CCUS captures 90% of CO2 from plant exhaust, storing it underground or repurposing it. India has explored CCUS via the US-India Strategic Energy Partnership (SEP), focusing on supercritical CO2 cycles and Coal FIRST initiatives.

• Status: CCUS remains experimental in India, with no commercial deployment in coal plants. Costs are high, and captured carbon lacks direct use, raising storage concerns.

• Potential: Combining CCUS with biomass co-firing could significantly cut emissions, but experts like MIT’s Ding question its feasibility within a decade due to costs and infrastructure needs.

4. Flue-Gas Desulfurization (FGD) Systems

• Overview: FGD systems remove sulfur dioxide (SO2) from exhaust, reducing air pollution. A 2015 mandate required 540 coal units to install FGD by 2027, but compliance is low (5% as of 2024).

• Controversy: On July 12, 2025, the Environment Ministry exempted 79% of plants outside a 10-km radius of populated cities, citing CO2 increases from FGD operations. This move, criticized on X by users like @dhruv_rathee and @jawharsircar, saves companies like Adani Power ₹16,000 crore but risks higher SO2 emissions.

• Impact: Full FGD implementation could halve PM2.5 pollution from coal plants, potentially saving 720,000 lives over a decade, per IIT Hyderabad’s Dr. Asif Qureshi.

Policy and Market Dynamics

India’s coal strategy balances energy security with climate commitments:

• National Electricity Plan (NEP): Despite a 2023 draft suggesting no new coal plants post-28 GW, 15.4 GW is planned by March 2025, and 90 GW by 2032, driven by demand. Coal’s share in capacity dropped to 50% in 2025, with non-fossil sources at 46%.

• Indian Carbon Market (2026): Excluding power sector emissions, the largest CO2 source, limits market efficacy. The Supreme Court’s nudge in Ridhima Pandey vs Union of India (2025) urges a CO2 reduction roadmap.

• Subsidies: Coal receives eight times more subsidies than renewables, per Climate Action Tracker, skewing market incentives despite solar and wind tariffs being cheaper (3 rupees/kWh vs. coal’s higher social cost).

Challenges to Cleaner Coal

• High Costs: CCUS and FGD systems require significant capital ($30 billion for FGD alone), deterring adoption. The Kemper project in the U.S., costing $5.2 billion for a 582-MW plant, highlights financial risks.

• Infrastructure Gaps: Biomass supply chains and carbon storage facilities are underdeveloped. Subcritical plants’ inefficiencies persist due to slow retrofitting.

• Policy Reversals: The FGD exemption for 79% of plants, criticized on X as prioritizing “polluter profits,” undermines air quality efforts, with SO2 emissions set to rise.

• Grid Stability: Coal plants must run at 55% capacity even during renewable peak hours, limiting emission cuts, as noted by Sinha.

Opportunities for Progress

• Technology Adoption: Scaling supercritical units and biomass co-firing, as proven at NTPC Tanda, could cut emissions by 30%, per CSE, supporting India’s 45% emissions intensity reduction target by 2030.

• Renewable Integration: With 48 GW of renewable transmission capacity installed and 159 GW under construction, pairing coal with storage (74 GW needed by 2032) could reduce reliance.

• International Collaboration: US-India SEP initiatives and ACT multilateral platforms offer technical support for CCUS and clean coal technologies.

• Public Awareness: X posts, like @zerodhamarkets’ celebration of 50% non-fossil capacity, reflect growing support for cleaner energy, pressuring policy shifts.

Broader Context: India’s Energy Transition

India’s coal reliance intersects with national priorities:

• Atmanirbhar Bharat: Cleaner coal technologies support self-reliance by leveraging domestic reserves while reducing import dependence, aligning with Minister Hardeep Puri’s energy strategy.

• Economic Pressures: U.S. tariffs (50% from August 28, 2025) threaten exports, necessitating efficient power for industries. Cleaner coal can stabilize costs.

• Administrative Reforms: Odisha’s crackdown on inefficient staff and the potential appointment of K. Moses Chalai as Finance Secretary signal governance improvements that could streamline energy policy.

India’s coal-fired power, generating over 70% of electricity, is a linchpin of energy security but a major environmental challenge, contributing 39% of greenhouse gas emissions. Cleaner technologies—supercritical plants, biomass co-firing, CCUS, and FGD systems—offer viable pathways to decarbonize, with potential to cut emissions by 30–50%. However, high costs, policy reversals like the FGD exemption, and infrastructure gaps hinder progress. With 15.4 GW of new coal capacity planned by March 2025 and 90 GW by 2032, India must prioritize efficiency upgrades and renewable integration to meet its 2030 climate goals. Supported by Atmanirbhar Bharat and international partnerships, cleaner coal technologies can bridge the gap between economic growth and sustainability, ensuring India’s power sector aligns with a greener future.