Due to greenhouse gas issues such as carbon dioxide resulting from the excessive consumption of fossil fuels and climate changes, there has been a rising interest and demand for eco-friendly energy resources. As a result, hydrogen has drawn an attention as a new energy source substituting fossil fuels. As an ultimate environment-friendly energy source, hydrogen is a clean unlimited resource which does not generate any byproducts other than water. Lately, this natural gas has become more diverse in terms of applications including hydrogen fuel cell vehicles.

As hydrogen draws a more attention as an alternative energy source, people’s interest in how to produce hydrogen has also increased. The most common hydrogen production method is to use by-product hydrogen through the separation of hydrogen-mixed gases generated during the petrochemical process. In addition, there is a way to reform of natural gases produced through decomposition into high-temperature/high-pressure vapor. The reforming of natural gases is the most common method which enables hydrogen production at low prices. Lastly, there is an electrolysis method which enables the acquisition of hydrogen through water electrolysis.

Since hydrogen purity has a significant influence on performances such as fuel cells, refining technology is crucial in acquiring high-purity hydrogen.
A hydrogen dryer is a system designed to purify hydrogen by eliminating oxygen in the hydrogen, using the palladium (Pd) catalyst and adsorbent.