Physico-chemical fracturing and cleaning of coal. [Treatment with CO/sub 2/ in water at high pressure]
Abstract
This invention relates to a method of producing a crushable coal and reducing the metallic values in coal represented by Si, Al, Ca, Na, K, and Mg, which comprises contacting a coal/water mix in a weight ratio of from about 4:1 to 1:6 in the presence of CO/sub 2/ at pressures of about 100 to 1400 psi and a minimum temperature of about 15/sup 0/C for a period of about one or more hours to produce a treated coal/water mix. In the process the treated coal/water mix has reduced values for Ca and Mg of up to 78% over the starting mix and the advantageous CO/sub 2/ concentration is in the range of about 3 to 30 g/L. Below 5 g/L CO/sub 2/ only small effects are observed and above 30 g/L no further special advantages are achieved. The coal/water ratios in the range 1:2 to 2:1 are particularly desirable and such ratios are compatible with coal water slurry applications.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 7153587
- Application Number:
- ON: DE84011282
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- AC02-76CH00016
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 01 COAL, LIGNITE, AND PEAT; COAL; COMMINUTION; DEASHING; ALUMINIUM COMPOUNDS; CALCIUM COMPOUNDS; CARBON DIOXIDE; COAL PREPARATION; FUEL SLURRIES; MAGNESIUM COMPOUNDS; POTASSIUM COMPOUNDS; PRESSURE DEPENDENCE; QUANTITY RATIO; REMOVAL; SILICON COMPOUNDS; SODIUM COMPOUNDS; TEMPERATURE DEPENDENCE; WATER; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CARBON COMPOUNDS; CARBON OXIDES; CARBONACEOUS MATERIALS; CHALCOGENIDES; DISPERSIONS; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROGEN COMPOUNDS; MATERIALS; MIXTURES; OXIDES; OXYGEN COMPOUNDS; SLURRIES; SUSPENSIONS; 013000* - Coal, Lignite, & Peat- Transport, Handling, & Storage
Citation Formats
Sapienza, R S, and Slegeir, W A.R. Physico-chemical fracturing and cleaning of coal. [Treatment with CO/sub 2/ in water at high pressure]. United States: N. p., 1983.
Web.
Sapienza, R S, & Slegeir, W A.R. Physico-chemical fracturing and cleaning of coal. [Treatment with CO/sub 2/ in water at high pressure]. United States.
Sapienza, R S, and Slegeir, W A.R. Fri .
"Physico-chemical fracturing and cleaning of coal. [Treatment with CO/sub 2/ in water at high pressure]". United States.
@article{osti_7153587,
title = {Physico-chemical fracturing and cleaning of coal. [Treatment with CO/sub 2/ in water at high pressure]},
author = {Sapienza, R S and Slegeir, W A.R.},
abstractNote = {This invention relates to a method of producing a crushable coal and reducing the metallic values in coal represented by Si, Al, Ca, Na, K, and Mg, which comprises contacting a coal/water mix in a weight ratio of from about 4:1 to 1:6 in the presence of CO/sub 2/ at pressures of about 100 to 1400 psi and a minimum temperature of about 15/sup 0/C for a period of about one or more hours to produce a treated coal/water mix. In the process the treated coal/water mix has reduced values for Ca and Mg of up to 78% over the starting mix and the advantageous CO/sub 2/ concentration is in the range of about 3 to 30 g/L. Below 5 g/L CO/sub 2/ only small effects are observed and above 30 g/L no further special advantages are achieved. The coal/water ratios in the range 1:2 to 2:1 are particularly desirable and such ratios are compatible with coal water slurry applications.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 30 00:00:00 EDT 1983},
month = {Fri Sep 30 00:00:00 EDT 1983}
}