This document discusses hydrogen production options for hydrocarbon processing industries. It summarizes three main production methods: electrolysis of water, steam reforming of natural gas/methane, and methanol cracking. Electrolysis has the highest production costs due to its high energy requirements but produces hydrogen with no carbon dioxide emissions. Steam reforming and methanol cracking have lower production costs but produce emissions. The costs of each method, including capital costs and operating costs, are compared for plant capacities from 250-1000 Nm3/h of hydrogen production. Purchasing hydrogen is also discussed as an alternative to on-site production.