- Article
Design and Optimization of a Novel Hybrid Membrane–Electrochemical Hydrogen Pump Process for Recovering Helium from NRU off Gas
- Wu Xiao,
- Hao Wang,
- Andi Cheng,
- Hanli Wang,
- Zhendong Yang,
- Xuemei Wu,
- Xiaobin Jiang and
- Gaohong He
Due to the low boiling point of helium, the nitrogen-rich off gas of the nitrogen rejection unit (NRU) in the liquefied natural gas (LNG) plant usually contains a small amount of CH4, approximately 1–4% He, and associated gases, such as H2. How...

