Advanced research for the characterization of hydrogen donor solvents in two-stage liquefaction. Final report

Technical Report · Fri Nov 01 04:00:00 EST 1985

OSTI ID:6120166

Chillingworth, R S; Pinkston, W D; Potts, J D

Significant differences were observed in the catalytic hydrogenation of solvents to be used for coal dissolution when employing a spectrum of fourteen commercially available hydrotreating catalysts (Task 2). The hydrogen/carbon (H/C) boost ratio (ratio of H/C in produced oil to the H/C of the feed oil) showed a variation at 700/sup 0/F, 2000 psig H/sub 2/ pressure and 60 minutes residence time from 1.38 for a Procatalyse HR-901 Co/Mo catalyst to 0.93 for a Katalco NM-136 Ni/Mo catalyst (dehydrogenation). The catalytic behavior of some of the catalysts for H/C boost ratio was also reversed as the process conditions varied. However, in the microautoclaves, it was possible to determine relatively superior catalysts for the H/C boost ratio and the conversion of preasphaltenes + asphaltenes. The Shell 317 Ni/Mo catalyst had a clearly superior conversion of aromatics as measured by proton NMR. In Task 3, six catalysts were chosen to determine the effect of solvent hydrogenation level on coal conversion and to select a suitable catalyst(s) together with the optimum operating conditions for the hydrogenation and hydrocracking functions. The major factor in producing a sufficiently hydrogenated recycle solvent from the catalytic hydrogenation step, when at constant reaction conditions, is to have a sufficiently high hydrogen content solvent for the SCT reaction. The Continuous Catalyst Aging System was used in Task 4 to further evaluate promising hydrogenation and hydrocracking catalysts identified in Task 3. The solvents produced with the Shell 317 Ni/Mo catalyst gave consistently higher coal conversions than the solvents produced with the Shell 324M or Katalco NM-506 Ni/Mo catalysts. Regardless of whether the solvents were obtained from hydrogenation only, hydrocracking only, or a blend of the two functionalities, there was an optimum level of coal conversion at approximately 7.3 to 7.5 weight percent hydrogen content.

• Research Organization: Cities Service Research and Development Co., Tulsa, OK (USA)
• DOE Contract Number: AC22-83PC60047
• OSTI ID: 6120166
• Report Number(s): DOE/PC/60047-T9; ON: DE86004222
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AGING
AUTOCLAVES
BENCH-SCALE EXPERIMENTS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL EXTRACTS
COAL LIQUEFACTION
COBALT
CRACKING
DATA
DECOMPOSITION
DIAGRAMS
ELEMENTS
EXPERIMENTAL DATA
FLOWSHEETS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCRACKING
HYDROGENATION
INFORMATION
LIQUEFACTION
MEDIUM PRESSURE
METALS
MOLYBDENUM
NICKEL
NUMERICAL DATA
ORGANIC SOLVENTS
PERFORMANCE TESTING
PYROLYSIS
RESEARCH PROGRAMS
SOLVENTS
TESTING
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
TSL PROCESS
YIELDS