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Show Economics dictate that coal-liquid mixtures, because they inherently cost more per unit of energy than coal, must be tailored for a fuel market in which they can command a higher price than coal. To command this higher price, the coal-liquid-mixture fuel must have desirable qualities that its coal feedstock lacks. The primary qualities required, besides combustibility, are behaviour as a liquid with appropriate viscosity for pumping, transportation and storage, minimization of ash-handling and collection requirements, and, a vital selling point in some cases, a decrease in sulphur content. Utilities and other industries which might use coal-liquid mixtures are generally not in a position to switch to such a fuel or even to assess the economics of switching while there is no proof that it can be burned reliably and safely. The program will therefore demonstrate the combustion of coal-liquid mixtures at small commercial scale, make available trial quantities of coal-liquid mixtures manufactured from Canadian coal, and ensure that all ancillary equipment is available for conversion of larger units. Once these goals have been achieved it is expected that normal commercial practice will take advantage of the technology wherever it is economic to do so. Background In 1972 the Canadian Combustion Research Laboratory, CCRL, conducted an in-house program to study the combustion and heat transfer characteristics of several coal-oil mixtures in a pilot-scale research tunnel furnace. The results of this work were presented at a joint industry/government seminar in 1972' ' in order to stimulate interest in coal-oil mixture technology. Subsequent evaluations of the data were presented at the International Flame (2) Research Foundation, IFRF, 4th Members Conference and the ASME (3) winter annual meeting both in 1976. This early research into 12-3 |
