Deashing of coal liquids with ceramic membrane microfiltration and diafiltration
- CeraMem Corp., Waltham, MA (United States)
Removal of mineral matter from liquid hydrocarbons derived from the direct liquefaction of coal is required for product acceptability. Current methods include critical solvent deashing (Rose{sup {reg_sign}} process from Kerr-McGee) and filtration (U.S. Filter leaf filter as used by British Coal). These methods produce ash reject streams containing up to 15% of the liquid hydrocarbon product. Consequently, CeraMem proposed the use of low cost, ceramic crossflow membranes for the filtration of coal liquids bottoms to remove mineral matter and subsequent diafiltration (analogous to cake washing in dead-ended filtration) for the removal of coal liquid from the solids stream. The use of these ceramic crossflow membranes overcomes the limitations of traditional polymeric crossflow membranes by having the ability to operate at elevated temperature and to withstand prolonged exposure to hydrocarbon and solvent media. In addition, CeraMem`s membrane filters are significantly less expensive than competitive ceramic membranes due to their unique construction. With these ceramic membrane filters, it may be possible to reduce the product losses associated with traditional deashing processes at an economically attractive cost. The performance of these ceramic membrane microfilters is discussed.
- Research Organization:
- USDOE Pittsburgh Energy Technology Center (PETC), PA (United States)
- DOE Contract Number:
- AC22-92PC92149
- OSTI ID:
- 198261
- Report Number(s):
- CONF-9508133-; ON: DE96001664; TRN: 95:008316-0013
- Resource Relation:
- Conference: Coal liquefaction and gas conversion contractor review meeting, Pittsburgh, PA (United States), 29-31 Aug 1995; Other Information: PBD: [1995]; Related Information: Is Part Of Coal liquefaction and gas conversion contractors review conference: Proceedings; PB: 733 p.
- Country of Publication:
- United States
- Language:
- English
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Deashing of coal liquids with ceramic membrane microfiltration and diafiltration. Final quarterly technical progress report, October 1--December 31, 1993
De-ashing of coal liquids with ceramic membrane microfiltration and diafiltration. Final quarterly technical progress report, January 1--March 31, 1994