Texas lignite utilization

Resources, Properties, and Utilization of Texas Lignite A Review... 

In this paper we review recently published investigations on Texas lignite dealing with the above subjects, summarizing the key results, and make some assessments about its future utilization potential. 

Direct combustion has been used with Texas lignite on a utility scale since the 1950 s. However, in the past ten years there has been considerable testing of Texas lignite in alternative energy processes such as fluidized bed combustion, gasification, and direct liquefaction. We summarize activities in each area below. 

EPRI contracted an economic study on the use of Texas lignite in atmospheric fluidized bed combustion (42), and projected that the costs of AFBC would be less than those for pulverized combustion plus flue gas desulfurization. However, while AFBC appears feasible for small-scale units (less than 50 MW ), there is some doubt that large scale utility AFBC systems can operate successfully. Part of this problem stems from the inadequacy of "bubbling bed" design normally used in AFBC newer designs, such as the circulating bed, offer more promise for commercial application and are being tested presently (32). 

EPRI Studies. In 1987, EPRI contracted with Fluor Daniel and Destec to conduct a detailed technical and economic analysis of IGCC power generation based on 400-MW plants for both Texas lignite and Wyoming subbituminous coal (9). Central and South West Services, Houston Lighting and Power, Texas Utilities Electric Company, and the Salt River Project also participated in this analysis. 

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