Global Hydrogen Generation Market By Source (Blue Hydrogen, Gray Hydrogen, Green Hydrogen), By Process (Steam Methane Reforming, Coal Gasification, Electrolysis, Others), By Delivery Mode (Captive, Merchant), by Application (Chemical Processing, Transportation, Petroleum Recovery, Power Generation, Others), By Region and Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2023-2033