Coking and gas products behavior of supercritical n-decane over NiO nanoparticle/nanosheets modified HZSM-5
| Autor: | Lin Long, Yunfeng Qiu, Weixing Zhou, Zhenzhong Lan |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
020209 energy Mechanical Engineering Non-blocking I/O 02 engineering and technology Building and Construction Decane Heat sink Fluid catalytic cracking Pollution Endothermic process Industrial and Manufacturing Engineering Supercritical fluid Catalysis Cracking chemistry.chemical_compound General Energy 020401 chemical engineering chemistry Chemical engineering 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Electrical and Electronic Engineering Civil and Structural Engineering |
| Zdroj: | Energy. 192:116540 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2019.116540 |
| Popis: | Endothermic hydrocarbon fuel of active thermal protection has great potential in cooling system. The bottlenecks for the practical application are the unsatisfied heat sink and severe coking issue. Here, NiO nanoparticle/nanosheet hybrid thin layers were successfully wrapped on the commercial HZSM-5 (denoted as ZSM-5@NiM), and showing significant modulation ability for the acidity properties of HZSM-5 to boost supercritical cracking of n-decane. The as-prepared catalysts make the NiO and HZSM-5 show synergistic effect which dramatically lowers the overall acidity of composite, thus changes the cracking path of n-decane, and results in effective anti-coking properties. ZSM-5@NiM decelerated many additional free radicals and generated more gases products by monomolecular beta cleavage reaction. Gases products also show positively correlating with the heat sink. The catalysts improve the heat sink of n-decane from 3.77 MJ/kg at 728 °C to 4.59 MJ/kg at 780 °C. Present work demonstrates that the introduction of nanostructured metal oxides into HZSM-5 will synergistically adjust the acidity of composite, leading to the manipulation of catalytic cracking path and extent, gas products, heat sink, coking behavior of supercritical n-decane, finally providing deep insights for the design and fabrication of catalysts for hydrocarbon fuel cracking. |
| Databáze: | OpenAIRE |
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