Catalytic performance of different zeolites for propane and CO2 coupling to propylene
| Autor: | Haifeng Tian, Jiankang Liao, Huan-huan He, Xiaojun Guo, Fei Zha, Xiaohua Tang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Exothermic reaction
010405 organic chemistry Chemistry 02 engineering and technology 01 natural sciences 0104 chemical sciences Catalysis chemistry.chemical_compound 020401 chemical engineering Chemical engineering Propane Specific surface area Yield (chemistry) Dehydrogenation Reactivity (chemistry) 0204 chemical engineering Space velocity |
| Zdroj: | Journal of Fuel Chemistry and Technology. 49:495-503 |
| ISSN: | 1872-5813 |
| DOI: | 10.1016/s1872-5813(21)60029-4 |
| Popis: | CO2 hydrogenation to light olefins is an exothermic reaction, while propane dehydrogenation to propylene is an endothermic reaction, and with generating of hydrogen. Coupling of the two reactions can break the equilibrium limit of thermodynamics and dynamics of the single reaction and improve yield of propylene. Therefore, the effects of different crystalline zeolites (HZSM-5, SAPO-34 and Al-SBA-16) on the reactivity of propane coupled with CO2 to propylene were investigated. The properties of different zeolites were characterized by means of XRD, SEM, NH3-TPD, N2 desorption and TG, and the catalytic performance of the three different zeolites in the reaction of propane and carbon dioxide coupling to propylene was investigated in a fixed bed reactor. The experimental results showed that HZSM-5 zeolite had high content of weak acid, large specific surface area and excellent catalytic activity. Typically the propane conversion rate is 10.5%, the CO2 conversion is 3.0%, the propylene selectivity is 38.4% and the yield is 4.0% when the volume ratio of propane to CO2 is 1:4, the reaction pressure is 0.1 MPa, the reaction temperature is 580°C, the catalyst mass is 0.2 g and the space velocity is 6000 mL/(gcat·h). |
| Databáze: | OpenAIRE |
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