Journal
APPLIED CATALYSIS A-GENERAL
Volume 566, Issue -, Pages 113-120Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2018.08.016
Keywords
n-Butane dehydrogenation; Adsorption mode; Desorption activation energy; 1-Butene; 1,3-Butadiene
Categories
Funding
- National Natural Science Foundation of China [21606257, 21706288]
- Natural Science Foundation of Shandong Province [ZR2017BB020]
- Fundamental Research Funds for the Central Universities [18CX02016A, 17CX02015A]
Ask authors/readers for more resources
Compared with i-butane dehydrogenation over Ni-Sn/SiO2 catalyst, the conversion is higher for n-butane dehydrogenation, the selectivity to butenes is obviously lower, and the catalyst deactivates more rapidly. In order to clarify the difference, adsorption modes of n-butane and 1-butene along with desorption activation energy of 1-butene were determined by in-situ FTIR and TPD. n-Butane is adsorbed on Ni-Sn surface with a H atom in methyl, and the formed intermediates are prone to the rupture of C-C bonds, leading to the lower selectivity to butenes. In addition, secondary reactions of butenes also play an important role in decreased selectivity, but to a less extent due to the medium desorption activation of butenes (58 kJ mol(-)(1) for 1-butene, for example). The generation of coke is the third reason for lower selectivity. The rapid deactivation of Ni-Sn/SiO2 catalyst mainly results from the formation of 1,3-butadiene, coke precursor, by further dehydrogenation of butenes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available