ID
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More SHOW PREVIEWS

Comment

A promising catalyst for low-temperature ammonia synthesis

By Tetsuo Satoh |

Researchers led by professor Hideo Honoso at Tokyo Institute of Technology (Yokohama City, Japan; www.titech.ac.jp) have discovered a new catalyst that enhances the efficacy of NH3 synthesis by two orders of magnitude over that of a conventional Ru catalyst at temperatures below 300°C. Furthermore, the developed catalysts are said to be superior to the wüstite-based iron catalyst, which is known as a highly active industrial catalyst at low temperatures and pressures. The catalyst is composed of self-organized ruthenium-barium core-shell nanoparticles on a mesoporous calcium amide matrix, Ru/Ba-Ca(NH2)2. To make the catalyst, nanometer-sized Ru–Ba core–shell structures are self-organized onto a Ba-Ca(NH2)2 support with 3.3-nm dia. during H2 pretreatment at 500 °C. The support material is simultaneously converted into a mesoporous structure with a high surface area (>100 m2/g), which is higher than 17 m2/g of the raw Ba-Ca(NH2)2 support materials. These self-organized nanostructures account for the high catalytic performance in low-temperature NH3 synthesis. In laboratory trials, the Ru/Ba-Ca(NH2)2 catalyst performed NH3 synthesis with turnover velocity of 7.5 mmol/g.h at 250°C and 9 atm, well above that achieved by industrial…
Related Content
DeNOx catalyst operates at lower temperatures
Professor Toru Murayama at Tokyo Metropolitan University (Tokyo, Japan; www.haruta-masatake.ues.tmu.ac.jp), in collaboration with Chugoku Electric Power Co., Inc., has developed…

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
5 ways to Optimize Production of Polymers and Intermediate Petrochemicals
7 Ways to Achieve Process Safety in Chemical Production
Five Reasons Why Chemical Companies Are Switching to Tunable Diode Laser Analyzer Technology
Simplify sensor handling and maintenance with ISM
Three reasons to measure pH in-line

View More

Live chat by BoldChat