Green Hydrogen: India's Path to a Sustainable Future

Introduction

Green hydrogen is emerging as a cornerstone of India’s journey toward a sustainable, low-carbon future. As the world’s third-largest energy consumer, India faces the dual challenge of meeting rising energy demands while reducing its $190 billion fossil fuel import bill (2024 figures). Green hydrogen, produced using renewable energy, offers a clean, versatile solution to decarbonize industries, power transport, and store energy. This beginner’s guide explores what green hydrogen is, how it’s made, its importance for India, and its role in the National Green Hydrogen Mission launched in 2022.

What is Green Hydrogen?

Green hydrogen is hydrogen gas (H₂) produced through electrolysis, a process that splits water (H₂O) into hydrogen and oxygen (O₂) using electricity from renewable sources like solar, wind, or hydro. Unlike other forms of hydrogen, green hydrogen is entirely clean, producing zero carbon emissions during its production. It’s a key tool for India to achieve its net-zero emissions target by 2070 and reduce reliance on imported fossil fuels.

Types of Hydrogen by Production Method

Hydrogen is categorized by its production method, often referred to by "colors" to indicate environmental impact. Here’s a detailed breakdown of all hydrogen types, including green hydrogen and bio-CNG-derived hydrogen:

• Green Hydrogen: Produced via electrolysis powered by renewable energy (solar, wind, hydro). It’s the most sustainable, with zero carbon emissions, aligning with India’s sustainability goals. Example: Adani’s off-grid green hydrogen pilot plant in Gujarat.

• Grey Hydrogen: Made from natural gas via steam methane reforming (SMR), releasing significant CO₂ (9–12 kg CO₂ per kg H₂). It dominates India’s current 6.5 million metric tonnes (MMT) hydrogen production, used mainly in fertilizers and refining.

• Blue Hydrogen: Similar to grey hydrogen but with carbon capture and storage (CCS) to reduce emissions (capturing ~90% of CO₂). It’s a transitional option but still relies on fossil fuels, limiting its sustainability.

• Turquoise Hydrogen: Produced through methane pyrolysis, splitting methane into hydrogen and solid carbon (not CO₂). It’s low-emission but not yet scalable, with limited adoption in India.

• Pink Hydrogen: Generated via electrolysis powered by nuclear energy. It’s low-carbon but faces challenges in India due to limited nuclear infrastructure and public concerns about nuclear safety.

• Yellow Hydrogen: Produced using grid electricity, which may include a mix of renewable and fossil fuel sources. Its carbon footprint depends on the grid’s energy mix, making it less sustainable in India’s coal-heavy grid.

• White Hydrogen: Naturally occurring hydrogen found in underground deposits. It’s rare, with minimal commercial exploration in India.

• Brown/Black Hydrogen: Made from coal gasification, highly polluting (20–30 kg CO₂ per kg H₂). It’s not aligned with India’s clean energy goals and is rarely used.

• Bio-CNG Hydrogen: Produced from bio-CNG (compressed natural gas derived from biomass, like agricultural waste or municipal waste). It involves reforming bio-CNG into hydrogen, offering a renewable alternative to grey hydrogen. In India, bio-CNG hydrogen is gaining traction in states like Punjab and Maharashtra, where biomass is abundant. It’s considered low-carbon but requires efficient waste management and infrastructure for scalability.

Green hydrogen stands out as the ultimate sustainable option, as it relies on renewable energy and produces no emissions, making it central to India’s energy transition.

The Science of Electrolysis

Electrolysis is the process of using electricity to split water into hydrogen and oxygen. An electrolyzer, the core equipment, consists of an anode and cathode separated by an electrolyte. When renewable electricity is applied, water molecules break down, releasing hydrogen at the cathode and oxygen at the anode. The process is clean when powered by renewable sources, making it ideal for green hydrogen production.

Types of Electrolyzer Technologies

India is investing in various electrolyzer technologies to scale green hydrogen production. Each has unique advantages and challenges:

• Alkaline Electrolyzers (AEL):

• Description: The most mature and widely used technology, operating with a liquid alkaline electrolyte (e.g., potassium hydroxide).

• Advantages: Low initial cost, robust, and long lifespan (10–15 years).

• Challenges: Less flexible with variable renewable energy inputs, larger footprint.

• Use in India: Preferred for large-scale projects due to cost-effectiveness, e.g., NTPC’s planned facilities.

• Proton Exchange Membrane (PEM) Electrolyzers:

• Description: Uses a solid polymer membrane, enabling compact design and faster response to power fluctuations.

• Advantages: High efficiency, ideal for integrating with intermittent renewables like solar and wind.

• Challenges: Higher capital expenditure (CAPEX) due to expensive materials like platinum.

• Use in India: Gaining traction for smaller, agile projects, with companies like Reliance exploring PEM.

• Solid Oxide Electrolyzers (SOEC):

• Description: Operates at high temperatures (700–900°C), using a ceramic electrolyte for high efficiency.

• Advantages: Highest efficiency, potential for co-electrolysis (using CO₂ to produce syngas).

• Challenges: Emerging technology, high costs, and limited commercial scalability.

• Use in India: Still in R&D phase, with potential for future adoption in high-efficiency projects.

India’s National Green Hydrogen Mission emphasizes scaling electrolyzer manufacturing to reduce costs, with a goal of 10 GW electrolyzer capacity by 2030.

Why Green Hydrogen is Important for India

India faces significant energy challenges:

• Fossil Fuel Dependency: In 2024, India spent $190 billion on fossil fuel imports, straining its economy (ET EnergyWorld).

• Carbon Emissions: As the third-largest emitter, India aims for net-zero by 2070, requiring clean alternatives.

• Industrial Decarbonization: Hard-to-abate sectors like steel, fertilizers, and chemicals need low-carbon fuels like green hydrogen.

• Energy Security: Green hydrogen reduces reliance on volatile global fuel markets, enhancing self-reliance.

Green hydrogen addresses these by:

• Reducing Imports: Producing 5 MMT by 2030 could save billions in import costs.

• Decarbonizing Industries: Replacing coal in steel or natural gas in ammonia production.

• Enabling Clean Transport: Powering fuel-cell vehicles, with pilots like India’s first green hydrogen bus in Delhi (2025).

• Supporting Renewables: Storing excess solar/wind energy as hydrogen for grid stability.

National Green Hydrogen Mission (NGHM)

Launched in 2022, the NGHM is India’s blueprint for green hydrogen leadership:

• Key Target: 5 MMT annual green hydrogen production by 2030, supported by 125 GW of renewable energy capacity.

• Investment: ₹19,744 crore ($2.37 billion) for incentives, R&D, and infrastructure.

• Incentives: Waivers on interstate transmission charges, renewable energy banking, and Production Linked Incentive (PLI) schemes for electrolyzers.

• Progress (2025): 862,000 tonnes per annum (TPA) capacity allocated, with pilot plants operational in Gujarat and plans for hubs in Andhra Pradesh and Tamil Nadu.

The mission aims to create 6 lakh jobs, reduce 50 MMT of CO₂ emissions annually, and position India as a global green hydrogen exporter.

Versatile Applications of Green Hydrogen

Green hydrogen’s versatility makes it a game-changer:

• Energy Storage: Converts intermittent renewable energy into hydrogen for long-term storage, addressing solar/wind variability.

• Industrial Feedstock: Used in ammonia production (fertilizers), steelmaking (replacing coal), and refining (desulfurization).

• Clean Transport Fuel: Powers fuel-cell vehicles like buses and trucks, ideal for heavy-duty transport. Example: Delhi’s green hydrogen bus pilot (2025).

• Power Generation: Can be used in gas turbines or fuel cells for clean electricity.

• Export Potential: Green ammonia and methanol for global markets, with India-EU and India-GCC corridors in development.

Current Progress in India (2025)

• Production: India produces 6.5 MMT of hydrogen, mostly grey, with green hydrogen at 862,000 TPA. Costs are ₹397/kg ($4.65/kg), targeting $2/kg by 2030.

• Key Projects: Adani’s Gujarat pilot, NTPC’s ₹85,000 crore Vizag facility, and Tuticorin’s green hydrogen hub with Petronas and ACME.

• Investments: Hygenco Green’s $2.5 billion for projects across India, signalling strong private-sector interest.

Conclusion

Green hydrogen is more than a fuel; it’s a catalyst for India’s sustainable future, aligning with net-zero goals, energy security, and economic growth. As India scales its production to 5 MMT by 2030, supported by the National Green Hydrogen Mission, it’s poised to lead the global clean energy transition. For businesses and stakeholders looking to set up or procure green hydrogen plants, expert guidance is crucial to navigate technology choices, policy incentives, and infrastructure needs.

To learn more about green hydrogen plant setup, procurement, or tailored solutions, contact Sort Consultancy through our website at www.sortconsultancy.com. Our team offers end-to-end support, from feasibility studies and technology selection (AEL, PEM, or SOEC) to securing incentives and building sustainable supply chains. Let’s build India’s green hydrogen future together.