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Biological Coal Desulfurization
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Book Synopsis Biological Coal Desulfurization by : Ming Le
Download or read book Biological Coal Desulfurization written by Ming Le and published by . This book was released on 1991 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sulfur removal from coal before combustion is of considerable interest to avoid emission of oxides of sulfur(SOx). Chemical and physical methods have been developed for removing the inorganic sulfur component in coal. This component is generally associated with pyrites(FeS2). However, no commercial methods have been developed for the removal of the organic sulfur conponent. This study describes microbial methods for removing organically bound sulfur from coal. The specific goals of this study were to ascertain whether a robust biologically active population such as activated sludge biomass can remove organic sulfur from coal and to devise sulfur analytical methods that are less cumbersome than the accepted standards for screening research results. Dibenzothiophene is used in isolating microorganisms that use sulfur as the sole source for growth. It was found that about 55% sulfur can be removed by activated sludge in shaker flasks from a coal which was previously treated to remove inorganic sulfur(IBC-108). A no cycling leaching reactor with activated sludge removed 50% sulfur from the same type of coal. Almost 72% sulfur is removed by A-i, S-Dl, T3-2 and Ar-i mixed cultures. It was also found that about 25 to 29% sulfur can be removed by different cultures from a commercially prepared washed coal in which the pyritic and organic sulfur have not been altered. The application of ion-chromatography and atomic spectrometry in analyzing sulfate, pyritic sulfur, organic sulfur and total sulfur following ASTM extraction can achieve easier and quicker sulfur determinations without sacrificing accuracy and reproducibility.
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization. Final Report by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization. Final Report written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Fresh isolates of bacteria presumptively identified as R. erythropolis unequivocally have a DbtS[sup +] phenotype. The production of OH-BP from either DBT or DBTO[sub 2] was confirmed by difference spectroscopy, HPLC, and mass spectrometry. The temperature, pH, and means of supplying the thiophenic or sulfonic sole source of sulfur were optimized. The maximal rate of growth of the organism, its affinity for sulfone, and the extent to which substrate was converted to product were determined by using batch, fed batch, and continuous cultures. For strain N1-36, the maximum specific growth rate was 0.235 hr[sup -1] which corresponds to a minimal generation time of 2.95 hr. The K[sub s] was estimated to be 0.39 [mu]M. With 100 [mu]M DBT as the sole sulfur source, approximately 40 [mu]M OH-BP are produced (after 40 hr of growth); with 100 [mu]M DBTO[sub 2] as the sole sulfur source, approximately 70 [mu]M OH-BP are produced (after 40 hr of growth). The desulfurization activity is repressed by SO[sub 4][sup =] OH-BP does not serve as a carbon source. The DbtS[sup +] phenotype of the R. erythropolis isolates is stable and discrete. The isolates selectively remove sulfur from DBT, a compound which models a refractory form of organic sulfur in compounds characteristic of fossil fuels. The desulfurization occurs with no oxidation of carbon-carbon bonds. The stability and specificity (along with genetic regulation) indicate that microbial desulfurization in a real phenomenon in which a noxious element is removed without significantly affecting the calorific value of the substrate. Additional characterization (and optimization) would provide the basis of a very important form of fossil fuel beneficiation.
Book Synopsis Coal Desulfurization by : S. K. Kawatra
Download or read book Coal Desulfurization written by S. K. Kawatra and published by Taylor & Francis. This book was released on 2001 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was written to provide a comprehensive survey of the current state-of-the-art information in coal preparation, with particular emphasis on coal desulfrization. The primary audience for this book will be practising coal preparation engineers who need complete information about all of the coal preparation and desulphurization technologies that are available now, or that may be available in the future. It will also be valuable for coal researchers who need details and comparative data for cutting-edge technologies that are still under development. The main emphasis is on physical coal preparation, but chapters also include chemical and biological technologies that are under development, but not yet used in industrial practice. Along with the successful technologies, also included are details of processes and techniques that were attempted, but were subsequently abandoned, along with discussions of the reasons they were abandoned.
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization. Eleventh Quarterly Technical Progress Report by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization. Eleventh Quarterly Technical Progress Report written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project is to produce one or more microorganisms capable of removing the organic and inorganic sulfur in coal. The original specific technical objectives of the project were to: clone and characterize the genes encoding the enzymes of the 4̀̀S̀̀ pathway (sulfoxide/sulfone/sulfonate/sulfate) for release of organic sulfur from coal; return multiple copies of genes to the original host to enhance the biodesulfurization activity of the organism; transfer this pathway into a fast-growing chemolithotrophic bacterium; conduct a batch-mode optimization/analysis of scale-up variables.
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization: Cloning and Expression of the Sulfoxide by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization: Cloning and Expression of the Sulfoxide written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bioprocessing and Biotreatment of Coal by : Wise
Download or read book Bioprocessing and Biotreatment of Coal written by Wise and published by Routledge. This book was released on 2017-11-22 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within technical overview sections on such emerging areas as bioprocessing, bioconversion, biosolubilization, biosystems and biocleaning, this handsomely illustrated reference specifically surveys pioneering work in the genetic production of sulfatase enzymes for removing organic sulfur from coal; r
Book Synopsis Bioprocessing and Biotreatment of Coal by : Wise
Download or read book Bioprocessing and Biotreatment of Coal written by Wise and published by CRC Press. This book was released on 1990-09-19 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within technical overview sections on such emerging areas as bioprocessing, bioconversion, biosolubilization, biosystems and biocleaning, this handsomely illustrated reference specifically surveys pioneering work in the genetic production of sulfatase enzymes for removing organic sulfur from coal; r
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization. [Thiobacillus Cuprinus]. by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization. [Thiobacillus Cuprinus]. written by and published by . This book was released on 1991 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this project is to produce one or more microorganisms capable of removing the organic and inorganic sulfur in coal. The original specific technical objectives of the project were to: clone and characterize the genes encoding the enzymes of the 4S'' pathway (sulfoxide/sulfone/sulfonate/sulfate) for release of organic sulfur from coal; return multiple copies of genes to the original host to enhance the biodesulfurization activity of the organism; transfer this pathway into a fast-growing chemolithotrophic bacterium; conduct a batch-mode optimization/analysis of scale-up variables.
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization written by and published by . This book was released on 1992 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research continues on desulfurization of coal using microorganisms. Topics reported on this quarter include: desulfurization with N1-36 (presumptively identified as Rhodochrous erythropolis), pulsed-field gel electrophoresis of chromosomal DNA's of Thiobacillus spp., and fresh isolates with the presumptive capacity to desulfurize dibenzothiophenes.
Book Synopsis Coal Desulfurization by : Robert Allen Meyers
Download or read book Coal Desulfurization written by Robert Allen Meyers and published by Marcel Dekker. This book was released on 1977 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization written by and published by . This book was released on 1991 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This department of energy-sponsored mission-oriented research project currently has three emphases. They are: (1) determining the kinetics of monohydroxybiphenyl (OH-BP) production in batch culture by N1-36, an unidentified soil isolate, when the organism is presented with dibenzothiophene (DBT) or dibenzosulfone (DBTO2); (2) establishing reliable methods for physically characterizing R68.45, a broad host range plasmid; and (3) attempting to elicit a physiologically consistent and genetically stable ability of some gram negative soil isolates to convert DBT to o, o(prime)-biphenol. Eachh of these goals has subsidiary components. For example, in addition to establishing kinetics of formation of OH-BP by N1-36, analyses have been or will be performed to determine whether the catalytic activity can be achieved with irradiated cells, spheroplasts, and cell extracts. This report presents information on progress towards fulfilling both the principal goals listed above and some relevant ancillary activities.
Book Synopsis Bio-desulfurization of Coal with Mesophilic and Thermophilic Microorganisms by : Michael Weichih Hsieh
Download or read book Bio-desulfurization of Coal with Mesophilic and Thermophilic Microorganisms written by Michael Weichih Hsieh and published by . This book was released on 1990 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Microbial Transformations of Low Rank Coals by : Don L. Crawford
Download or read book Microbial Transformations of Low Rank Coals written by Don L. Crawford and published by CRC Press. This book was released on 1992-09-24 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fifteen leading scientists active in research on the chemistry, microbiology, enzymology, and genetics of coal biotransformation summarize knowledge of the mechanisms by which bacteria and fungi metabolize the macromolecular structure of lignite coals. They also explore the potential for developing commercially viable biotransformations of low rank coals into useful chemicals and clean-burning liquid and gaseous fuels. Microbial Transformations of Low Rank Coals reviews the types of aerobic and anaerobic microbes known to transform fuel and discusses the relative potential of aerobic versus anaerobic organisms. Biochemical mechanisms used by microorganisms to solubilize, depolymerize, liquify, and gasify coal are examined. The book also reviews the potential for using microorganisms to remove organic sulfur from coal and the potential for using genetic engineering to improve coal biotransforming microorganisms.
Book Synopsis Desulfurization of Coal by Biological Pretreatment State-of-the-art by : Harold G. Hedrick
Download or read book Desulfurization of Coal by Biological Pretreatment State-of-the-art written by Harold G. Hedrick and published by . This book was released on 1982 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Biological Enhancement of Coal Desulfurization by :
Download or read book Molecular Biological Enhancement of Coal Desulfurization written by and published by . This book was released on 1992 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research continues on desulfurization of coal using microorganisms. Topics reported on this quarter include: desulfurization with N1-36 (presumptively identified as Rhodochrous erythropolis), pulsed-field gel electrophoresis of chromosomal DNA's of Thiobacillus spp., and fresh isolates with the presumptive capacity to desulfurize dibenzothiophenes.
Book Synopsis Microbial Desulfurization of High Sulfur Coal Using Thermophilic Bacteria by : Bruce Edward Beck
Download or read book Microbial Desulfurization of High Sulfur Coal Using Thermophilic Bacteria written by Bruce Edward Beck and published by . This book was released on 1981 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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