English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  LDH-derived Ni-catalysts in dry reforming of methane at high temperatures for an efficient CO2-conversion into syngas

Mette, K., Kühl, S., Düdder, H., Kähler, K., Tarasov, A., Muhler, M., et al. (2014). LDH-derived Ni-catalysts in dry reforming of methane at high temperatures for an efficient CO2-conversion into syngas. Abstracts of Papers of the American Chemical Society, 247: Catl 122. Retrieved from http://acselb-529643017.us-west-2.elb.amazonaws.com/chem/247nm/program/lookup_view.php?word=Behrens&where=authors&return=%2Fchem%2F247nm%2Fprogram%2Fauthorindex.php%3Fnum%3D1%26stop%3D80%26page%3D5%26start%3D320.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Mette, Katharina1, Author           
Kühl, Stefanie1, Author           
Düdder, Hendrik2, Author
Kähler, Kevin2, Author
Tarasov, Andrey1, Author           
Muhler, Martin2, Author
Behrens, Malte1, Author           
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Laboratory of Industrial Chemistry, Ruhr-University Bochum, Bochum, Germany, ou_persistent22              

Content

show
hide
Free keywords: -
 Abstract: The efficient conversion of CO2 into chemicals and fuels is a prospective building block for a more sustainable usage of our global resources. Among the various strategies to convert CO2 into higher-energy intermediates, heterogeneously catalyzed processes are of special interest, because they are scalable, based on a mature and flexible technology, which is already applied in chemical industries, and can be integrated into existing value chains. The dry reforming of methane (DRM) with carbon dioxide is an interesting option to convert these two greenhouse gases into CO/H2 mixtures (eq. 1). The resulting gas mixture can then be used in the well-established downstream syngas chemistry. (1) CO2 + CH4 ⟶ 2 CO + 2 H2 DH298 = 247 kJ mol-1 It is well known that Ru, Rh or Pt catalysts are very active in this reaction. Active base metals, in particular Ni, suffer from fast deactivation by coking. However, from an economical point of view Ni-based catalysts are more suitable for commercial application than noble metal ones. Thus, a current challenge is to find a noble metal-free catalyst that is resistant against coking. We have found that mitigation of the coking problem of noble metal-free Ni catalyst for DRM is possible by elevating the operation temperature towards 900 °C. Compared to lower reaction temperatures, the formation of fibrous carbon was substantially lowered. This favorable operational window can be exploited only if nanostructured catalysts with sufficient thermal stability are available to survive these harsh conditions. We present the synthesis, characterization, and catalytic testing of a highly active and stable Ni/MgAlOx catalyst that is characterized by small Ni particles (10 nm), which are partially embedded in an oxide matrix with a high specific Ni and total BET surface area. Despite the high Ni loading of 55 wt.-%, this catalyst shows only minor sintering at 900 °C and performs stably in DRM over 100 hours with an outstanding high rate of syngas formation. The stability of the nanostructure is ascribed to the embedding nature of the oxide matrix as a result of the uniform elemental distribution within the layered double hydroxide (LDH) catalyst precursor.

Details

show
hide
Language(s): eng - English
 Dates: 20142014
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Abstracts of Papers of the American Chemical Society
  Abbreviation : Abstr. Pap. Am. Chem. S.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 247 Sequence Number: Catl 122 Start / End Page: - Identifier: Other: 0065-7727
CoNE: https://pure.mpg.de/cone/journals/resource/954928522856