Hydrothermal treatment and the oxygen functionalities in Wyodak coal

Fundamental studies of coal liquefaction. Quarterly report No. 9, October 1, 1993--January 1, 1994

“…This scenario is consistent with the findings in our earlier FIMS work with Wyedak coal under hydrothermal conditions (Ross, et al, 1991b). In that study, conducted in quartz-lined reduction is conm_nly explained as being triggered by the homolytic scission of thermally weak bonds in the coal.…”

Fundamental studies of coal liquefaction

“…We have sought to correlate our observations with earlier studies we conducted with the same media and using SRI's field ionization mass spectrometer (FIMS) (DOE Contract No. DE-AC22-89PC89880; Ross et al, 1991). The data accumulated in that work, a portion of which was not reported for reasons of space and the desire to present a concise account of the findings, we now find to be very useful in discussion here.…”

“…The work conducted on this program was prompted by observations we made on an earlier DOE-sponsored program (Contract No. DE-AC22-89PC89880) dealing with the effects of near Critical liquid water on coal (Ross et al, , 1991. That program in turn was directed to trying to understand the influence of water on coal in several accounts on the enhancing effects of steam pretreatment at 300"-350°C on liquid yields during coal pyrolysis (Bienkowksi et al, 1987;Brandes and Graff, 1987a,b).…”

Fundamental studies of coal liquefaction. Quarterly report No. 8, July 1, 1993--October 1, 1993

“…6 and Wyodak coal under a variety of conditions (Contract No. DE-AC22-89PC89880, Ross, et al, 1991). The coals were heated at 2.5°C/rain to 500°C in the FIMS inlet assembly and the volatiles that developed were then swept into the instrument and analyzed over successive 30°C increments.…”