Impact of Small Promoter Amounts on Coke Structure in Dry Reforming over Ni/ ZrO2
Type
PreprintAuthors
Franz, RobertKuehlewind, Tobias
Shterk, Genrikh

Abou-Hamad, Edy
Parastaev, Alexander

Uslamin, Evgeny

Hensen, Emiel J.M.

Kapteijn, Freek
Gascon, Jorge

Pidko, Evgeny
KAUST Department
Advanced Catalytic Materials, KAUST Catalysis Center, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia.Chemical Engineering Program
Chemical Science
Imaging and Characterization Core Lab
KAUST Catalysis Center (KCC)
NMR
Physical Science and Engineering (PSE) Division
Date
2020-04-23Submitted Date
2020-04-22Permanent link to this record
http://hdl.handle.net/10754/662680
Metadata
Show full item recordAbstract
Coke deposition is one of the main challenges in the commercialization of dry reforming of methane over supported Ni catalysts. Besides the coke quantity, the structure of the deposits is also essential for the catalyst lifetime. Accordingly, in this study, we analysed the effect of different metal promoters on both these variables over Ni/ ZrO$_{2}$ catalysts. Alkali metals are known to block the most active coke forming sites already at low loading, leading to an investigation of Na, K and Cs. To analyse the possible contributions of coke gasification activity of the alkali metals, Mn was additionally used as a comparison. While the conversion is barely affected by the type of promoter, it has profound effect on the amount and the composition of carbon deposits formed during reaction: Addition of K or Mn reduces the coke content to a similar degree but with less carbon fibres observed in the case of K. Promotion by Cs and Na results in the lowest coke content, which is attributed to enhanced coke gasification via carbonate speciesCitation
Franz, R., Kuehlewind, T., Shterk, G., Abou-hamad, E., Parastaev, A., Uslamin, E., … Pidko, E. (2020). Impact of Small Promoter Amounts on Coke Structure in Dry Reforming over Ni/ ZrO2. doi:10.26434/chemrxiv.12174879.v1Sponsors
Financial support by the CatC1Chem project of NWO, BASF, SABIC and Sasol is gratefully acknowledged.Publisher
American Chemical Society (ACS)Additional Links
https://chemrxiv.org/articles/Impact_of_Small_Promoter_Amounts_on_Coke_Structure_in_Dry_Reforming_over_Ni_ZrO2/12174879/1https://chemrxiv.org/articles/Impact_of_Small_Promoter_Amounts_on_Coke_Structure_in_Dry_Reforming_over_Ni_ZrO2/12174879/files/22388544.pdf
ae974a485f413a2113503eed53cd6c53
10.26434/chemrxiv.12174879.v1
Scopus Count
Except where otherwise noted, this item's license is described as Archived with thanks to American Chemical Society (ACS)