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Novel multi-walled nanotubes-supported and alkali-promoted Ru catalysts for ammonia synthesis under atmospheric pressure |
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| Authors: | Hong-Bo Chen Jing-Dong Lin Yun Cai Xin-Ying Wang Jun Yi Jin Wang Guang Wei Yin-Zhong Lin Dai-Wei Liao |
| Institution: | a Department of Chemistry, Xiamen University, Xiamen 361005, China b Institute of Physical Chemistry, Xiamen University, Xiamen 361005, China c Department of Oceanography, Xiamen University, Xiamen 361005, China d The State Key Laboratory of Physical Chemistry on Solid Surfaces, Xiamen University, Xiamen 361005, China |
| Abstract: | A novel ammonia synthesis catalyst, alkali-promoted ruthenium supported on multi-walled nanotubes (MWNT), has been developed. Various alkali-promoters and carbon-based supports were compared. The effects of the contents of Ru and K, the treatment of MWNT, and the reaction temperature on ammonia synthesis activity were investigated. It was found that, as a support, the MWNT is much better than other carbon-based supports. The yield of NH3 was 47.423 ml NH3/h g-cat at 693 K, at atmospheric pressure and N2/3H2 flow-rate of 1800 ml/h for the catalyst with K/Ru/MWNT = 4/4/100 (w/w). |
| Keywords: | Ammonia synthesis Multi-walled carbon nanotubes Ruthenium Carbon Alkali Alkaline earth |
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