Carbon-13 solid-state n.m.r. investigation of coke deposits on spent catalysts used in coal liquefaction
作者： Daniel A. Netzel , Francis P. Miknis , Jennifer M. Mitzel , Tiejun Zhang , Paul D. Jacobs
DOI: 10.1016/0016-2361(96)00124-X
关键词:
摘要: Catalysts of the CoMo type were prepared on four different surface-modified alumina supports: (1) TiO2-coated by impregnation, (2) ZrO2-coated (3) deposition, and (4) carbon-coated pyrolysis. These catalysts used in a catalytic coal liquefaction microreactor. The coke deposits spent investigated using 13C solid-state nuclear magnetic resonance techniques cross polarization with magic angle spinning (CP-MAS) dipolar dephasing (DD). CP-MAS spectral data to quantify aromatic aliphatic carbon types, DD same samples quaternary from which cluster size was determined. promote most deposition found perform poorly terms conversion. deposited appears depend initial pore volume fresh catalyst percentage surface coating support.
elsevier.com
sci-hub.se 参考文章(26)
Robert L. McCormick, Henry W. Haynes, Daniel A. Netzel, Effect of catalyst acidity on the hydrogen-donor content of a hydrotreated coal liquid Industrial & Engineering Chemistry Research. ,vol. 28, pp. 1156- 1162 ,(1989) , 10.1021/IE00092A007
Fernando Diez, Bruce C. Gates, Jeffrey T. Miller, Daniel J. Sajkowski, Simon G. Kukes, Deactivation of a nickel-molybdenum/.gamma.-alumina catalyst: influence of coke on the hydroprocessing activity Industrial & Engineering Chemistry Research. ,vol. 29, pp. 1999- 2004 ,(1990) , 10.1021/IE00106A004
Fundamental Aspects of Heterogeneous Catalysis Studied by Particle Beams Plenum Press. ,(1991) , 10.1007/978-1-4684-5964-7
María T. Martínez, María D. Martínez, Jesús Osácar, JoséL. Miranda, Coal liquefaction, deactivation of coal hydrogenation catalysts Fuel Processing Technology. ,vol. 18, pp. 51- 58 ,(1988) , 10.1016/0378-3820(88)90073-2
Mark S. Solum, Ronald J. Pugmire, David M. Grant, Carbon-13 solid-state NMR of Argonne-premium coals Energy & Fuels. ,vol. 3, pp. 187- 193 ,(1989) , 10.1021/EF00014A012
Frances V. Stohl, Howard P. Stephens, A comparative study of catalyst deactivation in integrated two-stage direct coal liquefaction processes Industrial & Engineering Chemistry Research. ,vol. 26, pp. 2466- 2473 ,(1987) , 10.1021/IE00072A014
M. A. Wilson, R. J. Pugmire, Jirina. Karas, L. B. Alemany, W. R. Woolfenden, D. M. Grant, P. H. Given, Carbon distribution in coals and coal macerals by cross polarization magic angle spinning carbon-13 nuclear magnetic resonance spectrometry Analytical Chemistry. ,vol. 56, pp. 933- 943 ,(1984) , 10.1021/AC00270A018
John V. Hanna, Anthony M. Vassallo, Michael A. Wilson, CRAMPS determined proton aromaticities of australian coals : A comparison with dipolar dephasing Energy & Fuels. ,vol. 6, pp. 28- 34 ,(1992) , 10.1021/EF00031A005
Robert L. McCormick, Julia A. King, Todd R. King, Henry W. Haynes, Influence of support on the performance of coal liquid hydrotreating catalysts Industrial & Engineering Chemistry Research. ,vol. 28, pp. 940- 947 ,(1989) , 10.1021/IE00091A009
A. Fonseca, P. Zeuthen, J.B. Nagy, 13C n.m.r. analysis of catalyst carbon deposits simulated by model compounds Fuel. ,vol. 74, pp. 1267- 1276 ,(1995) , 10.1016/0016-2361(95)00074-F