Use of X-ray computed tomography to examine microbial desulfurization of lump coal

Clifford L. Spiro, David S. Holmes, John Lobos, Donald H. Maylotte

Resultado de la investigación: Article

11 Citas (Scopus)

Resumen

The bacterial removal of pyritic sulfur from in situ deposits of coal deserves attention. The process has the advantages of economy and extended periods of time to carry out the sulfur removal. For example, some projected coal reserves are not expected to be mined for another 25-50 years. Possibly a culture and appropriate medium could be admitted to the seam and be allowed to slowly permeate the coal for sufficient time that significant desulfurization occurs. A fair assessment of the in situ desulfurization kinetics and efficiency has not been made for wont of an adequate assay. Therefore, as a preliminary step to examine the feasibility of in situ pyrite removal we have investigated the bacterial removal of the pyrite from lump coal by using X-ray computed tomography to follow the dissolution of pyrite inclusions. It is concluded that X-ray computed tomography is an effective tool to assay in situ phenomena. In particular, mixed cultures of Thiobacillus ferrooxidans and associated acidophilic bacteria were used to treat a Lower Kittanning seam high-volatile A bituminous coal. It was demonstrated that pyrite inclusions can be removed at a depth of 17 mm within the lump over a 4-month period.

Idioma originalEnglish
Páginas (desde-hasta)76-79
Número de páginas4
PublicaciónEnergy & Fuels
Volumen1
N.º1
EstadoPublished - 1987

Huella dactilar

Coal
Pyrites
Desulfurization
Tomography
X rays
Assays
Bituminous coal
Bacteria
Dissolution
Deposits
Sulfur
Culture Media
Kinetics
pyrite

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Fuel Technology

Citar esto

Spiro, C. L., Holmes, D. S., Lobos, J., & Maylotte, D. H. (1987). Use of X-ray computed tomography to examine microbial desulfurization of lump coal. Energy & Fuels, 1(1), 76-79.
Spiro, Clifford L. ; Holmes, David S. ; Lobos, John ; Maylotte, Donald H. / Use of X-ray computed tomography to examine microbial desulfurization of lump coal. En: Energy & Fuels. 1987 ; Vol. 1, N.º 1. pp. 76-79.
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Spiro, CL, Holmes, DS, Lobos, J & Maylotte, DH 1987, 'Use of X-ray computed tomography to examine microbial desulfurization of lump coal', Energy & Fuels, vol. 1, n.º 1, pp. 76-79.

Use of X-ray computed tomography to examine microbial desulfurization of lump coal. / Spiro, Clifford L.; Holmes, David S.; Lobos, John; Maylotte, Donald H.

En: Energy & Fuels, Vol. 1, N.º 1, 1987, p. 76-79.

Resultado de la investigación: Article

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AU - Spiro, Clifford L.

AU - Holmes, David S.

AU - Lobos, John

AU - Maylotte, Donald H.

PY - 1987

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AB - The bacterial removal of pyritic sulfur from in situ deposits of coal deserves attention. The process has the advantages of economy and extended periods of time to carry out the sulfur removal. For example, some projected coal reserves are not expected to be mined for another 25-50 years. Possibly a culture and appropriate medium could be admitted to the seam and be allowed to slowly permeate the coal for sufficient time that significant desulfurization occurs. A fair assessment of the in situ desulfurization kinetics and efficiency has not been made for wont of an adequate assay. Therefore, as a preliminary step to examine the feasibility of in situ pyrite removal we have investigated the bacterial removal of the pyrite from lump coal by using X-ray computed tomography to follow the dissolution of pyrite inclusions. It is concluded that X-ray computed tomography is an effective tool to assay in situ phenomena. In particular, mixed cultures of Thiobacillus ferrooxidans and associated acidophilic bacteria were used to treat a Lower Kittanning seam high-volatile A bituminous coal. It was demonstrated that pyrite inclusions can be removed at a depth of 17 mm within the lump over a 4-month period.

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