Last updated : July 29, 2026 7:24 pm
Integrating coal gasification with green hydrogen, CCUS, and renewables transforms it into a sustainable, low-carbon energy solution
The Energy Crisis and the India Opportunity
Recent geopolitical tensions in West Asia and concerns over the Strait of Hormuz have once again highlighted the vulnerability of global energy markets. Volatile crude oil prices underscore the importance of energy security, particularly for India, which imports nearly 87% of its crude oil and depends heavily on imported LNG, methanol, ammonia, fertilizers, and petrochemical feedstocks.
Can India's vast coal resources help reduce this vulnerability? This article argues that they can—but not through conventional coal combustion. India possesses nearly 390 billion tonnes of coal, which should be viewed not merely as an energy resource but as a strategic carbon asset. Through gasification, catalysis, carbon capture, and green hydrogen integration, coal can be converted into methanol, hydrogen, ammonia, synthetic fuels, olefins, specialty chemicals, and advanced materials.
In an era where energy security is inseparable from economic resilience and technological sovereignty, coal offers an opportunity for import substitution, industrial growth, and supply-chain security. The challenge is not whether coal should be used, but how intelligently it should be used. India must move from a burning coal economy to a carbon conversion economy, where coal becomes the foundation for a sustainable, circular carbon ecosystem and a key pillar of national energy and industrial security
Clean and Low-Carbon Utilization of Coal
The clean and low-carbon utilization of coal is essential for the energy transition in coal-rich countries. A promising approach involves combining CO₂ generated from coal conversion with green hydrogen produced from renewable energy to synthesize value-added products such as methanol and methane. While methane can be used as a clean energy source, methanol serves both as a valuable chemical and a means of carbon utilization.
Integrated energy systems based on coal, renewable energy, carbon capture, and green hydrogen can simultaneously produce electricity, heat, cooling, fuels, and chemicals while substantially reducing emissions. As renewable energy, green hydrogen, and carbon utilization technologies continue to advance, such systems are expected to become increasingly economical, offering a practical pathway to energy security, industrial growth, and low-carbon development.
India’s Energy Reality
India possesses one of the world’s largest coal reserves. Coal still contributes ~55–70% of electricity generation. Imported crude oil, natural gas, methanol, ammonia, and petrochemicals create strategic vulnerability. Complete elimination of coal in the short term is unrealistic. Therefore, the key question is: “Can coal be used more intelligently and with higher carbon efficiency?” Burning coal for low-grade heat is thermodynamically and economically inferior compared with converting coal into high-value chemicals and materials.
India is the 2nd largest coal producer and among the top 5 countries in coal reserves globally. Coal reserves should not be viewed only as “fuel reserves,” but as “strategic carbon reserve”.
Coal Gasification: Converting Coal into Syngas
Coal gasification is a thermochemical process that converts coal into synthesis gas (syngas), a mixture primarily consisting of carbon monoxide (CO) and hydrogen (H‚ÇÇ). Unlike conventional coal combustion, which directly burns coal to generate heat and power, gasification partially oxidizes coal at high temperatures in the presence of controlled amounts of oxygen, air, steam, or carbon dioxide. This process transforms the carbon in coal into a versatile gaseous feedstock that can be used for the production of chemicals, fuels, hydrogen, fertilizers, and electricity (Figure 1).
The resulting syngas can be further processed to produce methanol, ammonia, synthetic natural gas, hydrogen, Fischer-Tropsch fuels, and a wide range of petrochemical intermediates. Coal gasification is therefore regarded as the cornerstone of coal-to-chemicals technology.
For a country like India, with abundant coal reserves and growing demand for chemicals and fuels, coal gasification offers a strategic pathway for enhancing energy security, reducing dependence on imported hydrocarbons, and creating value-added products from domestic resources. When integrated with green hydrogen, carbon capture, utilization and storage (CCUS), and renewable energy, coal gasification can become an important component of a cleaner and more sustainable carbon management strategy.
Figure 1. Coal to syngas to produce a variety of chemicals
Green Hydrogen and Methanol: Enablers of Low-Carbon Coal-to-Chemicals
Green hydrogen and methanol are emerging as key enablers of low-carbon coal-based chemical production. Renewable electricity can be used to produce green hydrogen through water electrolysis, which is then blended with coal-derived syngas to achieve the desired hydrogen-to-carbon ratio for downstream chemical synthesis. This reduces reliance on the conventional water-gas shift process, significantly lowering CO₂ emissions and improving carbon utilization efficiency.
Captured CO₂ can also be combined with green hydrogen to produce methanol, a versatile platform chemical and energy carrier. Methanol can subsequently be converted into formaldehyde, dimethyl ether (DME), olefins, and numerous other value-added products. Together, green hydrogen, carbon capture, and methanol synthesis provide a practical pathway for transforming coal-based chemical industries into cleaner, more sustainable, and carbon-efficient enterprises (Figure 2).
Figure 2. Low-carbon technology road map for chemical production in coal-based chemical industry.
Methanol: A Strategic Pathway for Low-Carbon Coal Utilization
Methanol is a key platform chemical and clean fuel used in the production of formaldehyde, acetic acid, dimethyl ether (DME), olefins, and transportation fuels. Its versatility, high combustion efficiency, and lower emissions make it an important component of the future low-carbon energy system.
Conventional coal-to-methanol processes rely on coal gasification but require hydrogen adjustment through the water-gas shift reaction, resulting in significant CO₂ emissions. Integrating green hydrogen from renewable electricity with coal-derived syngas can directly provide the required hydrogen-to-carbon ratio, substantially reducing emissions and improving carbon efficiency.
Further sustainability gains can be achieved by combining captured CO₂ with green hydrogen to produce methanol, effectively converting waste carbon into a valuable fuel and chemical. As renewable electricity and green hydrogen become more affordable, methanol is expected to play a central role as both an energy carrier and a chemical feedstock in the emerging circular carbon economy (Figure 3).
Figure 3. Direct CO2 hydrogenation to methanol (DCHM) process
(Source: Energy, Volume 333, 1 October 2025, 137352: DOI)
Methanol Economy: The Foundation of a Circular Carbon Economy
Methanol is one of the most important platform molecules of the twenty-first century, serving as a bridge between the energy and chemical sectors. Produced from coal, natural gas, biomass, captured CO₂, or renewable hydrogen, it is easy to store, transport, and utilize as both a chemical feedstock and a clean energy carrier.
The Methanol Economy envisions methanol as a universal intermediate for producing fuels, chemicals, and materials while reducing dependence on crude oil and natural gas. For India, it offers a strategic pathway to energy security, import substitution, carbon utilization, and sustainable industrial growth through the integration of coal gasification, green hydrogen, and carbon capture technologies.
Methanol can be converted into numerous value-added products, including formaldehyde, acetic acid, dimethyl ether (DME), olefins, gasoline, synthetic fuels, and hydrogen. It can also be used as a marine fuel, blended with conventional fuels, and serve as an efficient hydrogen carrier (Figure 4). By combining captured CO₂ with green hydrogen, methanol production can transform waste carbon into a valuable resource, making it a key enabler of carbon circularity.
Recognizing its potential, India has promoted the Methanol Economy as part of its energy security and decarbonization strategy. Methanol derived from domestic coal, biomass, municipal waste, and captured CO₂ can reduce dependence on imported crude oil, LNG, and petrochemical feedstocks while supporting the growth of petrochemicals, specialty chemicals, transportation fuels, and clean shipping.
In simple terms, coal is the carbon resource, syngas is the intermediate, and methanol is the gateway to thousands of chemicals, fuels, and materials that drive the modern economy.
Figure 4. Methanol as a feedstock for chemical industry (Source: U Mondal and G.D. Yadav, Green Chemistry 2021, 23(21), 8361–8405.
Hydrogen
Green hydrogen is emerging as a cornerstone of the low-carbon economy, particularly for coal-to-chemicals and carbon utilization pathways. Produced using renewable electricity, it can be combined with coal-derived syngas to manufacture methanol, ammonia, DME, synthetic fuels, and other chemicals while significantly reducing carbon emissions. Global hydrogen demand is expected to increase several-fold by 2050, with green hydrogen supplying a major share. Together with methanol, it will become an important energy carrier and industrial feedstock, enabling cleaner production of fuels, chemicals, and integrated energy systems.
Coal-to-Diesel: Enhancing Energy Security through Synthetic Fuels
Coal-to-diesel technology offers a strategic pathway for converting domestic coal resources into high-quality transportation fuels, thereby reducing dependence on imported crude oil. The process involves coal gasification to produce synthesis gas (a mixture of carbon monoxide and hydrogen), followed by catalytic conversion through the Fischer-Tropsch process to generate liquid hydrocarbons, which are subsequently upgraded into diesel, jet fuel, and other transportation fuels. The resulting synthetic diesel is virtually sulfur-free, possesses a high cetane number, and burns more cleanly than conventional petroleum-derived diesel.
For India, coal-to-diesel presents a significant opportunity to strengthen energy security, particularly in sectors such as defense, aviation, railways, mining, and long-haul transportation, where liquid fuels will remain indispensable for decades. Countries such as South Africa have successfully commercialized coal-to-liquids technologies on a large scale, demonstrating their technical feasibility. However, conventional coal-to-diesel processes are carbon-intensive and require substantial investments. Future deployment in India should therefore be integrated with carbon capture, utilization and storage (CCUS), green hydrogen, renewable energy, and advanced catalytic technologies to reduce lifecycle emissions and improve sustainability. In the long term, coal-to-diesel can serve as a transitional strategy that enhances fuel security while supporting the evolution toward cleaner and more diversified energy systems
Sustainability and Carbon Management: The Future of Coal Utilization
The future of coal utilization depends on advanced carbon management strategies. Carbon Capture, Utilization and Storage (CCUS) can efficiently capture CO₂ from syngas streams and convert it into methanol, synthetic fuels, chemicals, and construction materials, thereby supporting a circular carbon economy.
Additional reductions in carbon intensity can be achieved through biomass-coal co-gasification, waste plastics co-processing, and the integration of renewable hydrogen produced from water electrolysis. These approaches improve carbon utilization while reducing emissions and waste.
The future of coal lies not in conventional combustion but in integrated systems combining gasification, CCUS, biomass, waste valorization, and green hydrogen. The key challenge is no longer "coal versus renewables" but "carbon management versus carbon emissions." Through intelligent carbon utilization and circularity, coal-rich nations can simultaneously strengthen energy security and advance toward their net-zero goals.
The India Opportunity: Converting Coal into Strategic Growth
With one of the world's largest coal reserves and growing demand for fuels, fertilizers, and chemicals, India can transform coal into methanol, ammonia, hydrogen, synthetic fuels, and specialty chemicals. This can reduce import dependence, strengthen energy security, and support the vision of Atmanirbhar Bharat.
Coal-to-chemicals can drive industrialization in coal-bearing states through coal gasification hubs and integrated chemical parks, creating employment and manufacturing ecosystems. Supported by the National Coal Gasification Mission, policy incentives, and public-private partnerships, this sector can become a major pillar of India's future industrial and energy strategy.
Emerging Opportunities: Reimagining Coal in a Circular Carbon Economy
India can create a new generation of sustainable coal technologies through catalytic process intensification, biomass-coal co-gasification, waste plastics co-processing, and green hydrogen integration. These approaches improve carbon efficiency while reducing emissions and waste.
Future circular carbon refineries could integrate coal, biomass, waste plastics, captured CO₂, and renewable hydrogen to produce fuels, chemicals, and materials with minimal environmental footprint. Additional opportunities include distributed modular gasifiers, coal ash valorization into zeolites and advanced materials, and catalytic hydrogenolysis for converting waste carbon resources into valuable products. Together, these innovations can transform coal from a source of emissions into a cornerstone of a circular carbon economy.