CO2-Assisted propane aromatization over phosphorus-modified Ga/ZSM-5 catalysts
Journal Article
·
· Catalysis Science and Technology
- Harbin Inst. of Technology (China); Columbia Univ., New York, NY (United States)
- Columbia Univ., New York, NY (United States); Dalian Univ. of Technology (China)
- Harbin Inst. of Technology (China)
- Columbia Univ., New York, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Modification of HZSM-5 with phosphorus (P) and gallium (Ga) was found to enhance the activity of CO2-assisted oxidative dehydrogenation and aromatization (CO2-ODA) of propane to liquid aromatics. Flow reactor studies measuring the simultaneous CO2 reduction and the CO2-ODA of propane were performed at 873 K at atmospheric pressure over unmodified HZSM-5 and P/Ga/ZSM-5 catalysts. At comparable propane conversion, HZSM-5 showed a high selectivity toward the undesired methane product (41.4%) with a relatively low selectivity toward aromatics (16.5%). In comparison, P/Ga/ZSM-5 demonstrated a significantly higher aromatics selectivity (42.3%) with a simultaneous reduction in methane selectivity (13.5%). Density functional theory (DFT) calculations identified the mechanisms for propane dehydrogenation and aromatization over P/Ga/ZSM-5 and the role of CO2. Finally cooperative with P, CO2 addition avoided the formation of molecular H2 and reduced the barriers for benzene formation, leading to an enhanced activity and selectivity to aromatics from CO2-ODA of propane over P/Ga/ZSM-5.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- Fundamental Research Funds for the Central Universities; National Key Research and Development Program of China; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1618400
- Alternate ID(s):
- OSTI ID: 1601510
- Report Number(s):
- BNL--215930-2020-JAAM
- Journal Information:
- Catalysis Science and Technology, Journal Name: Catalysis Science and Technology Journal Issue: 6 Vol. 10; ISSN CSTAGD; ISSN 2044-4753
- Publisher:
- Royal Society of ChemistryCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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