Solvent refined lignite process development. Quarterly technical progress report No. 3, January--March 1978

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Six runs, each nominally at one week's duration, M-34 through M-39, were completed; this concludes the PDU experimental program for Project Lignite. The first three runs concluded the series to study the effects of different lignites on plant operability and product yields. Runs M-37 and M-38 were made using two Montana subbituminous coals. It was concluded that coals with the highest ash content, both lignite and subbituminous coals, gave greater overall conversion to gaseous and liquid organic products. The subbituminous coals gave lower gas yields and lower overall conversion while producing similar liquid yields when compared with lignite. Reactor solids ... continued below

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Pages: 236

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Severson, D.E. July 12, 1978.

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Description

Six runs, each nominally at one week's duration, M-34 through M-39, were completed; this concludes the PDU experimental program for Project Lignite. The first three runs concluded the series to study the effects of different lignites on plant operability and product yields. Runs M-37 and M-38 were made using two Montana subbituminous coals. It was concluded that coals with the highest ash content, both lignite and subbituminous coals, gave greater overall conversion to gaseous and liquid organic products. The subbituminous coals gave lower gas yields and lower overall conversion while producing similar liquid yields when compared with lignite. Reactor solids build up rapidly during initial operations, then level off and remain constant at 29 pounds per cubic foot of reactor volume as a run proceeds. Reactor solids evidently are composed of clay minerals and large particles of pyridine insoluble organic material when processing either lignites or subbituminous coals; in addition calcium/magnesium carbonate crystals (calcite/dolomite) are present in the case of lignite. Long term, trouble-free operation of the deashing unit was not accomplished. Integration of the unit for several hours of combined operation of the process was achieved, and the product from the deashing unit contained as low as 0.6% ash and pyridine insoluble material. Solids buildup in the solids settling tower was a continuing problem.

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Pages: 236

Notes

Dep. NTIS, PC A11/MF A01.

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  • Report No.: COO-4189-14
  • Grant Number: EF-77-C-02-4189
  • DOI: 10.2172/6318238 | External Link
  • Office of Scientific & Technical Information Report Number: 6318238
  • Archival Resource Key: ark:/67531/metadc1206857

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Office of Scientific & Technical Information Technical Reports

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  • July 12, 1978

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 26, 2018, 1:15 p.m.

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Severson, D.E. Solvent refined lignite process development. Quarterly technical progress report No. 3, January--March 1978, report, July 12, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1206857/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.