Figure 2 shows time course of the coal solubilization with l~lecene at 150. The results well demonstrate that the solubilization mainly took place within a few minutes and then proceeded gradually. This interesting phenomenon suggests that coal consists essentially of two portions, differ- ent in reactivity.Get Price
Solubilization of coal was demonstrated with filtrates (0.45-μm-pore-size filters) obtained from the broth in which Polyporus versicolor had grown. The rate and extent of solubilization were dependent on the age of the fungal cultures, the particle size of the coal, the pH of the filtrates, and the ...Get Price
Oct 24, 1972 · This invention relates to the solubilization of water-insoluble humic acids, lignites, and certain coals or water-insoluble coal derivatives. The coal derivatives, such as humic acids, are characterized by their alkali solubility due to the presence in their molecule of acidic functional groups but they are water-insoluble.Get Price
There is another procedure for solubilizing coal that does not rely on fungi: coal solubilization through bacteria. This process uses non-enzymatic mechanisms such as the production of surfactants, chelators, and alkaline substances (Hofrichter and Fakoussa, 2004).
The statistic shows the consumption of coal energy for electricity generation in the United States between 1950 and 2018. In 2018, U.S. energy consumption derived from coal came to approximately ...Get Price
Oct 09, 2014 · There is another procedure for solubilizing coal that does not rely on fungi: coal solubilization through bacteria. This process uses non-enzymatic mechanisms such as the production of surfactants, chelators, and alkaline substances (Hofrichter and Fakoussa, 2004).
Materials and Methods. In the initial stage, 50 g of coal sample was mixed with 100 ml dil. HNO 3 (5%) solution in a 500 ml teflon beaker and stirred for an hour at 30˚C. In the next stage of leaching, 10 g of filtrate was further treated with 100 ml concentrated HF (10% and 40%) for one hour.
There is another procedure for solubilizing coal that does not rely on fungi: coal solubilization through bacteria. This process uses non-enzymatic mechanisms such as the production of surfactants, chelators, and alkaline sub-stances (Hofrichter and Fakoussa, 2004). Therefore this may be an alternative to prevent the depolymerization of the HS produced.
The degree of leonardite solubilization by several sur-factants was determined. The surfactants tested included sodiumdodecylsulfate, Tween80(polyoxyethylenesorbitan monooleate), and cetylpyridinium chloride, each in 0.1 M sodium phosphate buffer (pH 5.2). Noneofthe surfactants tested solubilized leonardite significantly. Therefore, bio-Get Price
The present methods deal with the solubilization of coal and lignocellulose biomass using pyrophosphates, polyphosphates, or derivatives thereof. WO2012034087A1 - Solubilization of coal or lignocellulose biomass - Google Patents
Studies on the microbial transformation of lignite and bituminous coals to low-MW compounds which would facilitate technical handling are described and discussed. During incubation with hard coals Pseudomonas strs released biosurfactants including lipopeptide and a glycolipid.Get Price
Our results were similar to those reported for other coal-solubilizing microorganisms that could increase the pH of the growth medium to over 6 (and usually over 8) during the coal-solubilization process,, ; these organisms include Streptomyces and other bacteria, as well as fungi, and support the hypothesis that the microbial solubilization of coal is mediated by the production of alkali materials, .
Research programs on bioconversion of coal are presented. Research areas include: Microbial solubilization and desulfurization, recent progress in coal bioprocessing in the USA, recent progress in Europe, a research plan for biogasification, and biological conversion of synthesis gas into liquid fuels.Get Price
The AD-1 mediated coal degradation was optimized and showed a substantial release of organics at 1.5% glucose and 0.5% coal loading ratio within 11 days. The GC–MS analysis of the black liquid from coal solubilization showed a variety of organic compounds including aromatic acids, fatty acids, alkanes, amines, and amides.Get Price
Estimated recoverable reserves include only the coal that can be mined with today's mining technology after considering accessibility constraints and recovery factors. EIA estimates U.S. recoverable coal reserves at about 253 billion short tons, of which about 58% is underground mineable coal.Get Price
Read "Solubilization of Taiheiyo coal under mild conditions without gaseous hydrogen: catalysis by trifluoromethanesulfonic acid, Fuel" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.Get Price
Description. The microbial solubilization process of the present invention is capable of solubilizing various kinds of coal. Coals that are preferred for use in the present invention include North Dakota lignite, Mississippi lignite, Texas lignite, and Wyoming-Dakota (Wyodak) Subbituminous coal.
solubilization of coal samples increased from 55% with a short 1-bromobutane modifier to above 66% for longer 1-bromododecane modifiers. This optimal modification methodology using potassium naphthalenide was extended to include alkylbromides that contain COOH groups on the second terminus (e.g., 1-bromododecanoic acid).Get Price
In order to develop a system for a large scale coal solubilization and its bioconversion to utilizable fuel, we plan to clone the genes encoding Neurospora protein that facilitate depolymerization of coal. We also plan to use desulfurizing bacteria to remove the sulfur in situ and use other microorganisms to convert biosolubilized coal into utilizable energy following an approach utilizing ...Get Price
Current investigations into the biological solubilization of coal with microorganisms focus on the production of solubilizing activity in fungi. Test organisms for this work include a species of the yeast Candida previously isolated from a lignite outcrop, and P. chrysosporium, a filamentous higher fungus which has played a major role in lignin biodegradation research.Get Price