Interactions of SO2 and H2S with amorphous carbon films
2009 (English)In: Applied Catalysis A: General, ISSN 0926-860X, E-ISSN 1873-3875, Vol. 362, no 1-2, 8-13 p.Article in journal (Refereed) Published
There is significant interest in development of efficient catalyst-sorbents for the capture and conversion of sulfur-compounds such as H2S and SO2. In this work, ultra-high vacuum (UHV) techniques have been used to carefully prepare and thoroughly characterize amorphous carbon (a-C) thin films as models of activated carbon sorbents. Films with modified surface chemistries were prepared by oxidation of a sputter deposited carbon film (a-COx) and by sputter depositing carbon in the presence of N2 (a-CNx) or methane (a-CHx). Temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) were used to study H2S and SO2 surface chemistry on these films and on a highly oriented pyrolytic graphite (HOPG) reference-surface. The modification of the carbons with different heteroatoms influences both the strength of their interactions with SO2 and H2S and their capacities for sulfur-compound adsorption.
Place, publisher, year, edition, pages
Elsevier, 2009. Vol. 362, no 1-2, 8-13 p.
carbon films - catalysis - adsorption - SO2 - H2S
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-103888DOI: 10.1016/j.apcata.2009.04.008OAI: oai:DiVA.org:liu-103888DiVA: diva2:692287