Details
| Original language | English |
|---|---|
| Article number | 12 |
| Pages (from-to) | 1-14 |
| Number of pages | 14 |
| Journal | ChemEngineering |
| Volume | 5 |
| Issue number | 1 |
| Publication status | Published - 3 Mar 2021 |
Abstract
Economically and ecologically, the thermal decomposition of methane is a promising process for large scale hydrogen production. In this experimental study, the non-catalytic decomposition of methane in the presence of small amounts of carbon dioxide was analyzed. At large scales, natural gas or biomethane are possible feedstocks for the thermal decomposition and can obtain up to 5% carbon dioxide. Gas recycling can increase the amount of secondary components even further. Experiments were conducted in a packed flow reactor at temperatures from 1250 to 1350 K. The residence time and the amounts of carbon dioxide and hydrogen in the feed were varied. A methane conversion of up to 55.4% and a carbon dioxide conversion of up to 44.1% were observed. At 1300 K the hydrogen yield was 95% for a feed of methane diluted in nitrogen. If carbon dioxide was added to the feed at up to a tenth with regard to the amount of supplied methane, the hydrogen yield was reduced to 85%. Hydrogen in the feed decreases the reaction rate of the methane decomposition and increases the carbon dioxide conversion.
Keywords
- Carbon dioxide, Hydrogen production, Methane decomposition, Methane pyrolysis
ASJC Scopus subject areas
- Chemical Engineering(all)
- General Chemical Engineering
- Engineering(all)
- General Engineering
- Energy(all)
- General Energy
Sustainable Development Goals
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In: ChemEngineering, Vol. 5, No. 1, 12, 03.03.2021, p. 1-14.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Impact of carbon dioxide on the non-catalytic thermal decomposition of methane
AU - Marquardt, Tobias
AU - Wendt, Sebastian
AU - Kabelac, Stephan
PY - 2021/3/3
Y1 - 2021/3/3
N2 - Economically and ecologically, the thermal decomposition of methane is a promising process for large scale hydrogen production. In this experimental study, the non-catalytic decomposition of methane in the presence of small amounts of carbon dioxide was analyzed. At large scales, natural gas or biomethane are possible feedstocks for the thermal decomposition and can obtain up to 5% carbon dioxide. Gas recycling can increase the amount of secondary components even further. Experiments were conducted in a packed flow reactor at temperatures from 1250 to 1350 K. The residence time and the amounts of carbon dioxide and hydrogen in the feed were varied. A methane conversion of up to 55.4% and a carbon dioxide conversion of up to 44.1% were observed. At 1300 K the hydrogen yield was 95% for a feed of methane diluted in nitrogen. If carbon dioxide was added to the feed at up to a tenth with regard to the amount of supplied methane, the hydrogen yield was reduced to 85%. Hydrogen in the feed decreases the reaction rate of the methane decomposition and increases the carbon dioxide conversion.
AB - Economically and ecologically, the thermal decomposition of methane is a promising process for large scale hydrogen production. In this experimental study, the non-catalytic decomposition of methane in the presence of small amounts of carbon dioxide was analyzed. At large scales, natural gas or biomethane are possible feedstocks for the thermal decomposition and can obtain up to 5% carbon dioxide. Gas recycling can increase the amount of secondary components even further. Experiments were conducted in a packed flow reactor at temperatures from 1250 to 1350 K. The residence time and the amounts of carbon dioxide and hydrogen in the feed were varied. A methane conversion of up to 55.4% and a carbon dioxide conversion of up to 44.1% were observed. At 1300 K the hydrogen yield was 95% for a feed of methane diluted in nitrogen. If carbon dioxide was added to the feed at up to a tenth with regard to the amount of supplied methane, the hydrogen yield was reduced to 85%. Hydrogen in the feed decreases the reaction rate of the methane decomposition and increases the carbon dioxide conversion.
KW - Carbon dioxide
KW - Hydrogen production
KW - Methane decomposition
KW - Methane pyrolysis
UR - http://www.scopus.com/inward/record.url?scp=85102796156&partnerID=8YFLogxK
U2 - 10.3390/chemengineering5010012
DO - 10.3390/chemengineering5010012
M3 - Article
AN - SCOPUS:85102796156
VL - 5
SP - 1
EP - 14
JO - ChemEngineering
JF - ChemEngineering
SN - 2305-7084
IS - 1
M1 - 12
ER -