Grey Hydrogen Market Size To Reach $177.9 Billion By 2033

September 2026 | Report Format: Electronic (PDF)

Grey Hydrogen Market Growth & Trends

The global grey hydrogen market size is expected to reach USD 177.9 billion by 2033 and is projected to expand at a CAGR of 1.7% from 2026 to 2033, according to Grand View Research, Inc. Growing demand for hydrogen from petroleum refining, ammonia production, methanol manufacturing, and chemical processing industries are key factors driving the grey hydrogen market. Grey hydrogen remains widely used as an industrial feedstock, particularly in applications requiring continuous and large-scale hydrogen supply. The availability of natural gas and established hydrogen production infrastructure further supports the continued adoption of grey hydrogen.

Rising investments in refining, petrochemical, fertilizer, and chemical manufacturing facilities are accelerating market growth. Industrial producers are expanding hydrogen production capacity to meet growing requirements for refining processes, ammonia synthesis, methanol production, and other chemical applications. The continued development of industrial infrastructure in emerging economies is further supporting demand for grey hydrogen.

Technological advancements in natural gas-based hydrogen production are further supporting market development. Producers are focusing on improving steam methane reforming, autothermal reforming, and partial oxidation technologies to increase production efficiency, optimize feedstock utilization, and reduce operating costs. Improvements in process control, heat recovery, catalysts, and plant automation are also helping enhance the reliability and efficiency of hydrogen production facilities.

The continued availability of natural gas infrastructure and established industrial hydrogen supply chains is strengthening the market's outlook. Refineries, fertilizer producers, and chemical manufacturers are increasingly relying on captive hydrogen production to ensure stable and cost-effective supply for their operations. These developments are expected to sustain demand for grey hydrogen, particularly in regions with abundant natural gas resources and a strong base of hydrogen-intensive industries.

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Grey Hydrogen Market Report Highlights

Based on production technology, the steam methane reforming segment dominated the market with a revenue share of 73.8% in 2025. This is due to the maturity and proven scalability of SMR technology, widespread availability of natural gas feedstock, and its relatively low production cost compared with alternative hydrogen production routes.
Based on supply mode, the captive mode of supply held the largest revenue share of 77.9% in 2025. This dominance is driven by the high and continuous hydrogen requirements of refineries, ammonia plants, and chemical facilities.
Based on application, the petroleum refining segment dominated the market with a revenue share of 40.0% in 2025. This dominance is driven by the extensive use of hydrogen in hydrotreating and hydrocracking processes.
Based on region, Asia Pacific dominated the global market with a revenue share of 36.8% in 2025 while Middle East & Africa region is anticipated to register the fastest CAGR of 1.8% during the forecast period. The grey hydrogen market in this region is supported by refining, ammonia production, petrochemicals, and abundant natural gas resources, particularly across major oil and gas-producing economies.