I D
× COMMENTARYEDITOR'S PAGECOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
Nanofiltration Toray Industries, Inc. (Tokyo, Japan; www.toray.com) has created what…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment

Progress toward using ammonia as a hydrogen carrier for fuel cells

By Tetsuo Satoh |

In order for ammonia to serve as a hydrogen carrier, it is necessary to develop separation techniques that can reliably recover H2 from the decomposition of NH3 with sufficient purity for operating proton-exchange membrane (PEM) fuel cells. A step in this direction has been achieved by a Japanese collaboration lead by Yoshitsugu Kojima at Hiroshima University (Hiroshima; www.hiroshima-u.ac.jp), in collaboration with Taiyo Nippon Sanso Corp., Toyota Motor Corp. and Showa Denko K.K. The researchers, with support from a cross-ministerial strategic innovation program (SIP), named “Energy Carrier,” have developed components needed to decompose NH3 and recover high-purity H2. Using a ruthenium catalyst supported on MgO, NH3 is decomposed in a micro-channel cracker into H2 and N2 at 500°C and 0.1 MPa, with a 99.8% conversion efficiency. The remaining NH3 concentration is reduced from 1,000 parts per million (ppm) to below 0.02 ppm using a combination of pressure-swing adsorption and a zeolite-packed absorption column, to produce H2 with 99.98% purity (NH3 <0.02 ppm, N2 <10 ppm). A net H2 recovery rate of 90% was achieved. By utilizing the heat from the cracking, a net energy efficiency of 80% was observed. The researchers believe…
Related Content
Driving Toward a Hydrogen-based Economy
Technology developments are progressing towards large-scale production of ‘green’ hydrogen, along with improved methods for storage and transportation The world…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
How separation processes profit from Industrial Internet of Things (IIoT) solutions
Up to 80% increased production rates in plastic recycling
Higher throughput and purity in sodium bicarbonate production with up to 15% less energy consumption
Help feeding nations with chemical filtering technologies
Not at the forefront of Industry 4.0?

View More

Live chat by BoldChat