What is Hydrogen?
Hydrogen has become a global focus amid climate change and the urgent shift to clean energy. It’s expected to play a key role in the global energy transition, and in Thailand, this will soon become a more familiar subject. Hydrogen (H₂) has been studied since the 18th century. Water (H₂O) is the most abundant compound containing hydrogen on Earth.
Hydrogen can be produced from various raw materials, each emitting different levels of carbon dioxide (CO₂). To categorize cleanliness levels, colors are used to label the types:
- Brown Hydrogen
Made from coal using gasification, this process emits the most CO₂. - Grey Hydrogen
Made from natural gas via Steam Methane Reforming (SMR), emitting significant amounts of CO₂, though less than brown hydrogen. - Blue Hydrogen
Also made from natural gas, but CO₂ is captured and stored using Carbon Capture and Storage (CCS) technology. - Pink Hydrogen
Produced via electrolysis of water using electricity from nuclear energy. - Green Hydrogen
Produced via electrolysis using renewable energy sources like solar or wind power.
