Short residence time catalytic two-stage SRC (solvent refined coal) process

Conference · Sun Jan 01 04:00:00 EST 1978 · 71st AIChE Annu. Meet. Prepr.; (United States)

OSTI ID:6400155

Garg, D; Tarrer, A R; Guin, J A; Lee, J M; Curtis, C

A short residence time catalytic two-stage SRC (solvent refined coal) process which has the potential of producing a low-sulfur solid product that meets the newly proposed EPA standard gave best results, i.e., with respect to desulfurization over hydrogenation, by using low reaction temperature, short residence times, the ash of SRC residue as a first-stage catalyst, and cobalt-molybdenum-aluminum (Comox 451) as a second-stage catalyst. Laboratory experiments with Kentucky No. 9/14 mixture, Pittsburgh No. 8, and Monterey coals used reaction times of up to about 60 min for each stage, usually at 410/sup 0/C, a 2:1 solvent-coal ratio, and pressures of up to 2000 psig. The process was more selective for desulfurization than catalytic or noncatalytic single-stage SRC processing. Most of the coal was liquefied within the first 30 min in the first stage, during which time the same amount of sulfur was removed as after 120 min in the absence of a catalyst. Comox 451 had a higher desulfurization activity than either iron or the ash of SRC residue in experiments with phenyl sulfide, thiophene, benzothiophene, and dibenzothiophene as model compounds.

• Research Organization: Auburn Univ.
• OSTI ID: 6400155
• Report Number(s): CONF-781110-
• Conference Information: Journal Name: 71st AIChE Annu. Meet. Prepr.; (United States) Journal Volume: 101E
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
BENCH-SCALE EXPERIMENTS
CATALYSTS
CHEMICAL REACTIONS
DESULFURIZATION
FUELS
PERFORMANCE
POLLUTION REGULATIONS
REGULATIONS
SOLVENT-REFINED COAL
SPECIFICATIONS
SRC PROCESS