Journal
CATALYSIS TODAY
Volume 402, Issue -, Pages 45-51Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2022.02.020
Keywords
Barium hexaaluminate; Co catalyst; NH3 decomposition; Hydrogen production
Funding
- National Natural Science Foundation of China [21878001, 22078002, 22078027]
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, Changzhou University [ACGM2016-06-02, ACGM2016-06-03]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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The Co3O4 nanoparticles were densely dispersed on the BHA surface, which showed excellent performance in catalyzing ammonia decomposition. Among the synthesized catalysts, 35% Co/BHA exhibited high ammonia conversion and hydrogen production rate at 500 degrees Celsius with good catalytic stability.
The barium hexaaluminate (BHA) supported Co3O4 catalysts (XCo/BHA) with varied mass loading of Co (X = 10%, 20%, 30%, 35% and 40%) were prepared by impregnating Co3O4 nanoparticles (NPs) onto BHA support that synthesized through urea combustion method. The catalyst was characterized by high-resolution trans-mission electron microscope (HRTEM), temperature programmed reduction (TPR), temperature programmed desorption (TPD) and valued the ammonia decomposition performance by fixed-bed reactor. The results showed that Co3O4 NPs were dispersed densely on the BHA surface, with the strong alkaline support that could adjust the binding energy of the active sites and the nitrogen, which was conducive to the ammonia decomposition reac-tion. Among the synthesized catalysts, 35Co/BHA achieves 87.2% ammonia conversion at 500 degrees C with a space velocity of 30000 ml gcat-1 h-1, corresponding to a hydrogen production rate of 29.2 mmol H2 gcat-1 min-1, and also shows excellent catalytic stability.
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