Kinetics of catalytic oxidation of ethylene over palladium oxide

Autor:	Scott L. Anderson, Chung K. Law, Hai Wang, Yuxuan Xin, Bin Yang
Rok vydání:	2015
Předmět:	Ethylene Mechanical Engineering General Chemical Engineering Inorganic chemistry chemistry.chemical_element Activation energy Mole fraction Catalysis Chemical kinetics chemistry.chemical_compound Reaction rate constant Catalytic oxidation chemistry Physical and Theoretical Chemistry Palladium
Zdroj:	Proceedings of the Combustion Institute. 35:2233-2240
ISSN:	1540-7489
DOI:	10.1016/j.proci.2014.06.094
Popis:	Catalytic oxidation of ethylene was experimentally studied by wire microcalorimetry and mass spectrometry over the temperature range of 400–800 K at atmospheric pressure. The catalyst is a palladium oxide (PdO) surface on a polycrystalline palladium wire. For mixtures containing 0.3–0.6% C 2 H 4 and 3.75% O 2 in N 2 , the heat release rate as well as the mole fractions of gas-phase species were identified. Experimental observation revealed the temperature-dependent channels for the C 2 H 4 oxidation, with mixed H 2 release and H 2 O production below 580 K and complete oxidation to CO 2 and H 2 O above 600 K. Analysis of the global reaction kinetics shows that for 620 ⩽ T (K) ⩽ 740 K the surface catalytic reaction rate is the first order in ethylene concentration and has an activation energy of 48.2 ± 1.4 kJ/mol. A surface chemistry model is proposed and the dissociative adsorption rate constant of C 2 H 4 on PdO surface was determined by fitting the experimental data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3cc84385d041cca4473728055f155c3d https://doi.org/10.1016/j.proci.2014.06.094 Zobrazit plný text záznamu Full Text from ScienceDirect