Hydrogen Generator Market By Type (Onsite, Portable), By Process (Steam Reforming, Electrolysis, Others), By Application (Chemical Processing, Petroleum Recovery, Fuel Cells, Refinery, Others), By Capacity (<100 Nm3/h, 100-2,000Nm3/h, >2,000Nm3/h) - Growth, Share, Opportunities & Competitive Analysis, 2026 - 2034