caa a22 4500 475844645 CHVBK 20180406123910.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1019188706587 doi (NATIONALLICENCE)springer-10.1023/A:1019188706587 Characterization of coke deposited on catalysts by carbon K-edge near edge X-ray absorption fine structure (NEXAFS) spectroscopy [Elektronische Daten] [Hiromichi Shimada, Motoyasu Imamura, Nobuyuki Matsubayashi, Takeru Saito, Tomoaki Tanaka, Takashi Hayakawa, Shigeo Kure] C K-edge NEXAFS spectra could distinguish between the structures of coke on the catalysts used in fluid catalytic cracking, hydrotreatment and dry reforming of methane from the characteristic ;π* features. A particular advantage of NEXAFS spectroscopy was found in the characterization of highly aromatic coke that could not be analyzed by cross-polarization 13C-NMR due to the lack of magnetization transfer from 1H to 13C. The NEXAFS results elucidated two different structures of coke on Ni catalysts used in dry reforming of methane; one with a graphitic structure formed at lower temperatures and the other with a non-graphitic structure formed at higher temperatures. Kluwer Academic Publishers, 2000 catalyst deactivation nationallicence soft X-ray absorption nationallicence Ni-W sulfide nationallicence zeolite nationallicence Shimada Hiromichi National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut Imamura Motoyasu National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut Matsubayashi Nobuyuki National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut Saito Takeru National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut Tanaka Tomoaki National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut Hayakawa Takashi National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut Kure Shigeo Nippon-Mitsubishi Oil Co. Ltd., 3-12, Nishi-shimbashi 1-Chome, Minato-ku, 105, Tokyo, Japan aut Topics in Catalysis Kluwer Academic Publishers 10/3-4(2000-05-01), 265-271 1022-5528 10:3-4<265 2000 10 11244 https://doi.org/10.1023/A:1019188706587 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1019188706587 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shimada Hiromichi National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut NATIONALLICENCE 700 1- Imamura Motoyasu National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut NATIONALLICENCE 700 1- Matsubayashi Nobuyuki National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut NATIONALLICENCE 700 1- Saito Takeru National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut NATIONALLICENCE 700 1- Tanaka Tomoaki National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut NATIONALLICENCE 700 1- Hayakawa Takashi National Institute of Materials and Chemical Research, 1-1, Higashi, Tsukuba, 305-8565, Ibaraki, Japan aut NATIONALLICENCE 700 1- Kure Shigeo Nippon-Mitsubishi Oil Co. Ltd., 3-12, Nishi-shimbashi 1-Chome, Minato-ku, 105, Tokyo, Japan aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers 10/3-4(2000-05-01), 265-271 1022-5528 10:3-4<265 2000 10 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer