Biological desulfurization of coal by mesophilic and thermophilic microorganisms

Bhattacharyya, Dibakar; Hsieh, Ming‐Ju; Francis, Howard J.; Kermode, R. I.; Khalid, Ahmad Mukhtar; Aleem, Hussain M.I.

doi:10.1016/0921-3449(90)90047-8

Cited by 15 publications

(5 citation statements)

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“…It was observed that the release and reprecipitation of liquid phase iron pattern ( Figure 17) which was obtained by using 1% coal. However, the maximum amount of iron released into the liquid was only 67 PPM unlike our last report (Bhattacharyya et al 1990) in which approximately 400 PPM (when 5% coal was used) was released. Therefore, the quantity of iron Coal also contains organic sulfur compounds such as DBT, thiophene & benzothiophene etc.…”

Section: Resultscontrasting

confidence: 71%

“…A total organic carbon (TOC) analysis of the aqueous phase, obtained by treating the medium with D. desulfuricans, of the various runs was performed after 10 days ( Table 7). As seen from Table #7 Previous studies (Bhattacharyya et al 1990) with kermophilic S. brierleyi indicated signifcant changes in iron forms of biotreated coals. Depending on the operating conditions (such as pH, C02/air ratio, initial FeS2 concentration), reprecipitation of iron compounds on coal particle surface occurred in different forms.…”

Section: Resultsmentioning

confidence: 67%

“…Sulfolobus sp. have been widely used for desulfkization of pyritic sulfur of coal (Bhattacharyya et al 1990). Recently S. acidocaldarius was also reported to oxidize DBT (Kargi 1984(Kargi , 1985(Kargi , 1986.…”

Section: Resultsmentioning

confidence: 99%

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Cooperative research in coal liquefaction. Final report, May 1, 1990-- April 30, 1991

Huffman¹

1992

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One step in the synthesis of anion-treated iron and tin oxides is precipitation as hydroxides using either urea or ammonium hydroxide. The catalysts prepared using urea as a precipitation agent were more reproducible than those using ammonium hydroxide in terms of activities and properties. These catalystdcatalyst precursors were characterized by several techniques to determine their physical (size and structure related) and chemical (acidity) properties. Sulfated and mo€ybdated iron oxides were found to have grain sizes as small as 10-20 nm. An attempt was made to correlate the physicochemical properties of these catalysts with their activity for coal liquefaction. SiIron ion-exchanged into lignite from an iron Acetate solution showed excelle activity for direct coal liquefaction. Two lignites were studied, and both exhibite significant increases in both total conversion and oil yields when from 1 t o 7% of ir was incorporated into the coal by cation-exchange. Mossbauer spectroscopy and 0th characterization methods indicated that a substantial percentage of the iron was present in particles o r molecular complexes less than 30 A in diameter. 4An investigation of catalyst dispersion has been made using electron probe microanalysis (EPMA) following impregnation of Wyodak coal with FeC1, and (NH4)2hbS4 in aqueous solutions. Before hydrotreatment, the iron and molybdenum are found coating the coal particles. After hydrotreatment at 350°C and 1500 psig H2, both the Fe and Mo are dispersed throughout the interior of the coal particles.Design, construction and testing of a batch-type tubing bomb microreactor has been completed in the liquefaction laboratory at West Virginia University. Tests of the variation in liquefaction yields for Blind Canyon coal as a function of time, temperature, and agitation speed have been completed. A second system, which is similar in design, but incorporates a hydrogen purge, associated gas preheat and downstream product analysis, has also been designed and constructed. Testing of this system is now in progress.Reaction of ferric chloride at 5°C with sodium sulfide in aqueous solution yielded a black colloid of Fez& On heating to 100 -200"C, the ferric sulfide disproportionates to pyrite, pyrrhotite, and elemental sulfur. Particle sizes of the iron sulfides produced by this method are typically around 200 A. These iron sulfides exhibit reasonable catalytic activity for DCL of Blind Canyon coal at 350"C, increasing total conversion by about lo%, split approximately between increases in asphaltene and oil + gas yields. At 400°C, however, the catalytic conversion and yields are only slightly hig,her than those observed thermally for the DECS-17 coal.A novel aerosol reactor for generation of ultrafine iron sulfide catalysts has been designed and is now under construction.In situ transmission electron microscopy (TEM) studies were carried out to elucidate the basic mechanisms of the catalytic reaction between hydrogen and graphite in the presence of either iron sulfide or molybdenum sulfide...

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Section: Resultscontrasting

confidence: 71%

Section: Resultsmentioning

confidence: 67%

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Cooperative research in coal liquefaction. Final report, May 1, 1990-- April 30, 1991

Huffman¹

1992

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“…Among these three methods, the biological method has become the most potential method, with advantages of safety, environmental protection, low consumption, and high efficiency of coal desulfurization. 5 The use of microorganisms able to oxidize sulfur compounds present in coals constitutes a clean alternative to remove sulfur from coal, because they promote the oxidative conversion of the reduced forms of sulfur to soluble, easily washed-out compounds. 6 Coal mine drainage (CMD) environments are especially interesting because, in general, the low pH of the habitat is the consequence of microbial metabolism and the stable physiological characteristics of the microorganisms from the long-term natural selection.…”

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bacterial Diversity Analysis of Coal Mine Drainage Enriched by Different Energy Sources

et al. 2013

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Coal mine drainage (CMD) collected from Meitanba mine (Hunan province, China) was studied. Coal, sulfur, ferrous sulfate, and a mixture of sulfur and ferrous sulfate were employed as selective energy substrates to culture CMD cells, and the bacterial biodiversities of each group were investigated. Four groups, C group [coal (15%, m/v) + CMD], S group [sulfur (10%, m/v) + CMD], SF group [sulfur (5%, m/v) + ferrous sulfate (22.35%, m/v) + CMD], and F group [ferrous sulfate (44.7%, m/v) + CMD] were set up. A total of 211 clones were recovered and evaluated by amplified ribosomal DNA restriction analysis (ARDRA). A total of 26 different ARDRA patterns were obtained and studied as operational taxonomic units (OTUs). The results showed that the F group could not be studied because of its extremely low cell concentration. The S, SF, and C groups all obtain their OTUs of 7, 8, and 11, respectively. Although they had the same original CMD, obvious differences were detected among these three groups. Additionally, Acidithiobacillus spp. represented 79.07% of the bacterial population in the C group. Pseudomonas spp. (11.63%) and Legionella spp. (9.3%) were also detected in the C group, which was different from the S group [Acidithiobacillus spp. ( 74.99%), Pseudomonas spp. (21.67%), and Legionella spp. (3.33%)]. The compositions of the microbial community structure of the SF group [Acidithiobacillus spp. (98.42%), Pseudomonas spp. (1.54%), Legionella spp. (0%)]was also different from the other two groups, especially the percentage of Acidithiobacillus spp. and Legionella spp. Principal component analysis (PCA) revealed that the distribution of the microbial communities of the C group was more similar to the S group than the SF group. The results showed that iron could actually play an important role in the microbial community structure of CMD, especially for the selection of some important species for coal biodesulfurization.

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Kinetics of coal desulphurization by Acidianus brierleyi

et al. 1993

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Acidianus brierleyi was demonstrated to remove pyritic sulphur from coal. A. brierfeyi was also found capable of catalyzing the removal of what is normally reported as organic sulphur from coal 171US34. A kinetic analysis was performed by assuming a first order reaction. The first order kinetics allowed a comparison with literature data for Thiobacillus ferrooxidans. Also, formation of jarosite was taken into account in the analysis. The simple first order kinetics was observed to fit the data on removal of sulphur satisfactorily.

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Biological desulfurization of coal by mesophilic and thermophilic microorganisms

Cited by 15 publications

References 1 publication

Cooperative research in coal liquefaction. Final report, May 1, 1990-- April 30, 1991

Cooperative research in coal liquefaction. Final report, May 1, 1990-- April 30, 1991

Bacterial Diversity Analysis of Coal Mine Drainage Enriched by Different Energy Sources

Kinetics of coal desulphurization by Acidianus brierleyi

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