Sulfur Texas lignite

Liquid sulfur dioxide was used to separate the liquefaction products from Texas lignite when Tetralin had been used as the hydrogen donor solvent. The large excess of Tetralin present with the lignite liquefaction products did not interfere with the liquid sulfur dioxide separation procedure. The chemical composition of the fractions were similar to that of SRC and SRL. 

Westby, T. Kochhar, R. Edgar, T, F. "Retention of Sulfur by Ash During Fluidized Bed Combustion of Texas Lignite" AIChE Meeting, Houston, Texas, April, 1983. 

North America.. In the United States, lignite deposits are located in the northern Great Plains and in the Gulf states. Subbituminous coal is found along the Rocky Mountains. The western half of North Dakota has about 74% of the nation s resources, Montana 23%, Texas 2%, and Alabama and South Dakota about 0.5% each. The lignite resources to 914 m represent 28% of the total toimage of all coal deposits in the United States. The lower cost and low sulfur content have contributed to rapid growth in production. 

The sulfur is relatively easy to remove and the nitrogen is relatively difficult to remove. One of my slides showed that the nitrogen content of products from the Wyoming coal is about the same as from Illinois coal or from the lignite from Texas. 

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