A 70 MPa hydrogen-compression system using metal hydrides

✍ Scribed by Xinhua Wang; Haizhen Liu; Hui Li

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 266 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2011.04.193

✦ Synopsis

The objective of this work was to develop a 70 MPa hydride-based hydrogen compression system. Two-stage compression was adopted with AB 2 type alloys as the compression alloys. Ti 0.95 Zr 0.05 Cr 0.8 Mn 0.8 V 0.2 Ni 0.2 and Ti 0.8 Zr 0.2 Cr 0.95 Fe 0.95 V 0.1 alloys were developed for the compression system. With these two alloys, a 70 MPa two-stage hydride-based hydrogen compression system was designed and built with hot oil as the heat source, and composite materials formed by mixing hydrogen storage alloys with Al fiber were used to prevent hydride bed compaction and to prevent strain accumulation. The experimental results showed that Ti 0.95 Zr 0.05 Cr 0.8 Mn 0.8 V 0.2 Ni 0.2 and Ti 0.8 Zr 0.2 Cr 0.95 Fe 0.95 V 0.1 alloys could well meet the requirements of compression system. Composite materials formed by mixing hydrogen storage alloys with Al fiber were an effective way to prevent strain accumulation for hydride compression. With cold oil (298 K) and hot oil (423 K) as the cooling and heating sources, the built compression system could convert hydrogen pressure from around 4.0 MPa to over 70 MPa.