Methane Dry Reforming at High Temperature and Elevated Pressure: Impact of Gas-Phase Reactions

Autor:	Lea C. S. Kahle, Olaf Deutschmann, Thomas Roussiere, Lubow Maier, Karla Herrera Delgado, Guido Wasserschaff, Stephan Andreas Schunk
Rok vydání:	2013
Předmět:	Reaction mechanism Methane reformer Hydrogen Carbon dioxide reforming General Chemical Engineering chemistry.chemical_element General Chemistry Coke Industrial and Manufacturing Engineering Methane Catalysis chemistry.chemical_compound Chemical engineering chemistry Carbon dioxide
Zdroj:	Industrial & Engineering Chemistry Research. 52:11920-11930
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie401048w
Popis:	Catalytic dry reforming over a platinum-based catalyst is described experimentally and numerically in a laboratory pilot-plant flow reactor. The results reveal that coking in the upper part of the catalyst bed and at the entrance of the reactor occurs, depending on the composition of the reaction mixture and the respective temperature. To a significant extent, gas-phase reactions play a role as being the cause for the observed coking behavior in the reforming of methane in the presence of carbon dioxide at high temperatures of 1123–1273 K and at 20 bar. Hydrogen addition can inhibit coke formation better than water addition. The reactor is modeled by a one-dimensional description of the reacting field using elementary-step reaction mechanisms of up to 4238 gas-phase reactions among 1034 species and 58 heterogeneous reactions among 8 gas-phase species and 14 surface-adsorbed species. The study leads an optimized positioning of the catalyst in a technical reformer tube.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e5f433475665e56569c1f5b452c42d53 https://doi.org/10.1021/ie401048w Zobrazit plný text záznamu