The Europe captive petroleum refinery hydrogen generation market is experiencing significant growth, reaching USD 12.7 billion in 2024. This growth is attributed to the broader energy transition landscape in the region, compelling industries to adopt sustainable energy solutions and reduce reliance on fossil fuels. The market is set to grow at a 7% CAGR from 2025 to 2032, driven by stringent environmental regulations and the need to align with energy transition strategies. The electrolysis segment is expected to lead the market, exceeding USD 20.5 billion by 2034, due to technological advancements improving efficiency and reducing operational costs in clean energy production. Germany is poised to reach a market value of USD 3 billion by 2034, driven by the shift from coal-dependent processes to cleaner alternatives and the increasing demand for clean energy domestically. Key players in this market include Air Liquide, BASF, BP, and ExxonMobil, among others, indicating a strong industry presence focused on greener operations and sustainable energy solutions.