Global Hydrogen Generation Market By Technology (Coal Gasification, Steam Methane Reforming, and Others), By Application (Methanol Production, Petroleum Refining, Ammonia Production, and Others), By Systems (Merchant and Captive), By Source (Coal, Natural Gas, Water, and Biomass), By Region and Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2022-2032