KIT | KIT-Bibliothek | Impressum | Datenschutz

RCEM Studies: Conversion of CH4 into unsaturated hydrocarbons and hydrogen

Drost, Simon ORCID iD icon; Schießl, Robert; Maas, Ulrich

Abstract (englisch):

We study the conversion of small alkanes (CH$_\text{4}$, C$_\text{2}$H$_\text{6}$, C$_\text{3}$H$_\text{8}$) into unsaturated hydrocarbons, notably C$_\text{2}$H$_\text{2}$, C$_\text{2}$H$_\text{4}$ and hydrogen, in a Rapid Compression/Expansion Machine (RCEM). The newly formed molecules can have a higher value in terms of economic use, handling, or in terms of further utilization in a chemical process. By the conversion, also chemical energy is stored, because the unsaturated products feature larger standard enthalpies of formation compared to the initial substances.
In the experiments, the conversion (defined as amount of consumed initial reactant relative to initial amount) levels between 15 to 38 %. The dependence of the conversion on compression temperature, pressure and dilution by monatomic gas was investigated. The temperature was found to be the most important factor, followed by the dilution. However, these variables in respect to the mentioned pyrolysis process have physical and practical limitations (e.g. soot formation or a gas separation process) to increase the conversion further.
A limiting factor in conversion is also the duration time which the gas mixture resides in a high temperature environment. ... mehr

Zugehörige Institution(en) am KIT Institut für Technische Thermodynamik (ITT)
Publikationstyp Poster
Publikationsjahr 2021
Sprache Englisch
Identifikator KITopen-ID: 1000141614
Veranstaltung 743rd WE-Heraeus-Seminar : Process Integration, Chemical and Thermal Energy Storage for the Energy Transformation (2021), Online, 22.03.2021 – 24.03.2021
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page