Highly dispersed catalysts for coal liquefaction. Quarterly report No. 6, November 23, 1992--February 22, 1993
The objectives of this project are to study the effect of pretreatment methods on the two-stage liquefaction process. In particular the effects of dispersed catalysts and carbon monoxide atmospheres on a coal liquefaction process. The project is divided into three technical tasks. Task 1 and 2 deal with the analyses and liquefaction experiments, respectively, whereas Task 3 deals with the economic impact of utilizing the pretreatment methods. This quarter concentrated on Tasks 1 and 2. which are summarized below. The fractionated products from the coal liquefaction experiments conducted in Task 2 exhibited a very low H/C ratio, most likely due to the low H/C ratio of the Black Thunder recycle vehicle used in these liquefaction experiments. Wilsonville has reported the recycle vehicle as approximately 20% distillable material (1100{degree}F at one atmosphere), 20% insoluble material (CI) and 40% resid. We are now in the process of fractionating this material in order to determine its contribution to our liquefaction results. We also analyzed some of the sulfated iron catalysts for surface areas, finding that the calcined catalyst had surface areas of 76 m{sup 2}/g, compared to 6 m{sup 2}/g for the iron oxide used by Wilsonville. We also synthesized two more catalysts, the sulfated iron catalyst, and a thiolato iron carbonyl catalyst. We hope to be able to screen these catalysts for liquefaction experiments in the 300 mL autoclaves during the next quater. This quarter we studied iron carbonyl as a catalyst using atmospheres of hydrogen and of hydrogen and carbon monoxide at total cold pressures of 1000 psia. The comparisons are not yet completed, but it appears that pure hydrogen gave slightly higher conversions into preasphaltenes, but similar conversions into asphaltenes and oils.
- Research Organization:
- SRI International, Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-91PC91039
- OSTI ID:
- 10172416
- Report Number(s):
- DOE/PC/91039-T6; ON: DE93018896
- Resource Relation:
- Other Information: PBD: 28 May 1993
- Country of Publication:
- United States
- Language:
- English
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