Studies in coal liquefaction with application to the SRC and related processes. Quarterly report, May-July 1979

Technical Report · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5571126

Guin, J A; Tarrer, A R

Two improved processes for the conversion of coal to a low-sulfur solid product were studied. Developmental studies were made of a single-stage processing method by which coal mineral additives can be used to improve drastically the hydrogen economy of Solvent Refined Coal (SRC) processing technology and also to meet the present new source performance standards (NSPS). Laboratory-scale batch experiments were performed to evaluate the catalytic/scrubbing activity of different coal minerals (SRC-residue, SRC-residue ash, coal ash, Kerr-McGee ash, reduced iron, magnetite, and hematite). These experiments were carried out under reaction conditions representative of those used in the SRC process. The catalytic activity and selectivity for liquefaction, hydrogenation, and desulfurization reactions were studied in the presence of the different mineral additives and compared with those obtained in the absence of additives. Based on the results of these studies an improved single-stage process is proposed which has the potential of reducing hydrogen requirements for conventional SRC processing by 30 to 50% and reducing the sulfur content significantly. In order to further reduce the sulfur content the proposed single-stage process is modified by adding a hydrotreating stage (two-stage process) to provide additional desulfurization needed to meet the proposed NPSES. In the first-stage, residence time and hydrogen consumption are minimized by using inexpensive mineral additives, treated to improve their selectivity for desulfurization over hydrogenation. The second-stage involves hydrotreating the filtered liquid product from the first-stage using a commercial Co-Mo-Al catalyst. For both processes kinetic models for hydrodesulfurization and hydrogen consumption have been developed.

• Research Organization: Auburn Univ., AL (USA)
• DOE Contract Number: AC22-79ET13397
• OSTI ID: 5571126
• Report Number(s): DOE/ET/13397-T2; FE-3397-3; ON: DE82008206
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
CONSUMPTION RATES
DATA
DESULFURIZATION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
FUELS
HEMATITE
HYDROGEN
HYDROGENATION
INFORMATION
IRON
IRON COMPOUNDS
IRON ORES
IRON OXIDES
LIQUEFACTION
LIQUIDS
MAGNETITE
METALS
MINERALS
NONMETALS
NUMERICAL DATA
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
QUANTITY RATIO
REFINING
RESIDUES
SOLVENT-REFINED COAL
SPECIFICITY
SRC PROCESS
SULFUR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TSL PROCESS