Changes in hydrogen utilization with temperature during direct coal liquefaction

Conference · Sat Jan 01 00:00:00 EST 1983 · Prepr. Pap. - Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5330988

Finseth, D H; Bockrath, B C; Cillo, D L; Illig, E G; Lett, R G

A reliable means of monitoring the major pathways of hydrogen utilization, in contrast to only measuring net hydrogen comsumption, would be very useful for process optimization. The goal of this work was to develop an analytical approach for quantitatively distinguishing hydrogen consumed in hydrogenation from that utilized to stabilize thermolysis fragments. The approach outlined yields a rather detailed description of the net utilization of hydrogen during direct liquefaction, partitioning it into contributions from gas generation, heteroatom removal, hydrogenation, and matrix breakdown. Preliminary results indicate that internal hydrogen reorganization, with little consumption, predominates at low temperatures, with hydrogenation being compensated for by the hydrogen liberated in condensations. As the temperature is increased, bond cleavage reactions and aromatization reactions appear to become more important, and the net hydrogen consumption increases. (3 tables 1 figs., 11 refs.)

• Research Organization: Pittsburgh Energy Tech. Center, PA
• OSTI ID: 5330988
• Report Number(s): CONF-830814-Vol.4
• Journal Information: Prepr. Pap. - Am. Chem. Soc., Div. Fuel Chem.; (United States), Vol. 28:5; Conference: 186. national meeting of the American Chemical Society, Washington, DC, USA, 28 Aug 1983
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL LIQUEFACTION
CHEMICAL REACTION KINETICS
HYDROGEN TRANSFER
AMMONIA
CHEMICAL BONDS
CHEMICAL COMPOSITION
COAL
HYDROGEN
HYDROGEN SULFIDES
HYDROGENATION
TEMPERATURE EFFECTS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROGEN COMPOUNDS
KINETICS
LIQUEFACTION
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
REACTION KINETICS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction