Transition between thermal and chemical effect of hydrogen assisted n-butane fuel catalytic ignition over Pt catalyst

Xiong, Pengfei; Zhong, Beijing; Zheng, Dong; Yang, Shunhua und Zhou, Xin (2020): Transition between thermal and chemical effect of hydrogen assisted n-butane fuel catalytic ignition over Pt catalyst. In: Fuel, Bd. 276, 118053

Abstract

Hydrogen assisted n-butane catalytic ignition on platinum in micro-combustion reactor are experimentally investigated over a wide equivalence ratio (0.4-1.5) of n-butane/air. In order to obtain the catalytic ignition temperature of n-butane, the temperature and concentration of the gas after catalytic reaction zone are measured by thermocouples and GC (gas chromatograph). Two ways when the ignition could not be achieved at room temperature 300 K, external heating and hydrogen addition are adopted to promote n-butane ignition. Results show that there are not only thermal effect of hydrogen, but also chemical effect which depends on the amount of hydrogen addition. There is a critical amount of hydrogen addition that below which is thermal effect and above which is chemical effect. The critical amount of hydrogen addition is 3.1% when the equivalence ratio of n-butane/air is 0.8 while 1.7% when the equivalence ratio is 0.4. The catalytic ignition temperature of chemical effect is much lower than that of thermal effect. Also the chemical effect would be achieved, as long as the amount of hydrogen addition has reached the transition amount. The results reveal that few hydrogen additions can realize catalytic ignition from room temperature without any ignition apparatus.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0016-2361
• Sprache: Englisch