Solubilization of Miike bituminous coal was mainly the result of depolymerization by cleavage of methylene bridges, while in Yallourn lignite, deoxygenation as well as depolymerization was required for solubilization. Most of the remaining BF3 probably formed complexes with the
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 ...
Solubilization of Miike bituminous coal was mainly the result of depolymerization by cleavage of methylene bridges, while in Yallourn lignite, deoxygenation as well as depolymerization was required for solubilization. Most of the remaining BF3 probably formed complexes with the
Jan 12, 1998 Coal solubilization depended on acidity in the reaction, reaction temperature and solvent. High extractability of the treated coal with HFtoluene depended on the cleavage of methylene, and the higher effectiveness of the HFBF3toluene system for the depolymerization of coal could be ascribed to more cleavage of ether groups as well as of methylene bridges.
solubilization, thermal ejection from the liquid intermediate. ... signicant geochemical precursor to coal.57 Thus, a clear characterization of lignin depolymerization can have a strong impact on the foundational knowledge for bio- and thermochemical woody biomass conversion strategies. Due
Nov 20, 2015 These mechanisms act on the coal, allowing humified organic matter HOM to be released through solubilization or depolymerization in the first case, LRC solubilization leads to the formation of dark-colored liquid droplets, enriched in HOM, that occur at high pH values pH 710 and is due to the action of alkalis, chelating agents ...
microorganism. Coal solubilization is expected to occur in nutrient rich media whereas depolymerization of solubilized coal macromolecules is expected to occur in nutrient limited media. 3 To determine the role of extracellular enzymes laccases, lignin peroxidases and Mn peroxidases that are secreted by lignin degrading fungi during coal ...
Aug 22, 2018 Clean coal technologies e.g. coal biosolubilization are of essential value, especially in Europe, where coal is the national wealth and other energy sources like crude oil are not available. Fusarium oxysporum LOCK 1134, the strain isolated from brown coal, efficiently biosolubilizes lignite. The obtained liquefied products contain 50 less sulfur and over 99 less mercury than the crude coal.
In order to enable the primordial solubilization of the lignin before catalytic depolymerization, the subsequent researches on OL catalytic depolymerization were conducted in organic solvents MeOH, EtOH, iPrOH, n-BuOH or organicH 2 O co-solvents. 86 Zhai et al. prepared different molar ratios of NiFe supported on activated carbon AC and ...
The above procedures lead to coal solubilization by means of major chemical modification of the coal structure and attendant partial depolymerization. Analytical data on the products obtained indicate, however, that the above procedures do not cause complete coal depolymerization into low molecular weight, monocluster products.
Aug 01, 1998 Pectin depolymerization by PG2 was extensive at pH values from 4.0 to 5.0 and was further enhanced at high K levels. Oligomers were abundant products in in vitro reactions at pH 4.0 to 5.0, decreased sharply at pH 5.5, and were negligible at pH 6.0. EDTA stimulated PG-mediated pectin solubilization at pH 6.0 but did not promote oligomer ...
Rare earth solubilization from coal by-products. Kudos to Andrew for publishing his first paper for his dissertation Middleton, A. Park, D.M. Jiao, Y. Hsu-Kim, H. 2020. Major element composition controls rare earth element solubility during leaching of coal fly ash and coal by-products. Intl.
Dec 22, 1996 Quarterly report, October 1--December 31, 1996, author Mishra, N C, abstractNote In order to develop a system for a large scale coal solubilization and its bioconversion to utilizable fuel, the author plans to clone the genes encoding Neurospora protein that facilitate depolymerization of coal. He also plans to use desulfurizing bacteria to remove the sulfur in situ and use other microorganisms to convert biosolubilized coal
microorganism. Coal solubilization is expected to occur in nutrient rich media whereas depolymerization of solubilized coal macromolecules is expected to occur in nutrient limited media. 3 To determine the role of extracellular enzymes laccases, lignin peroxidases and Mn peroxidases that are secreted by lignin degrading fungi during coal ...
microorganism. Coal solubilization is expected to occur in nutrient rich media whereas depolymerization of solubilized coal macromolecules is expected to occur in nutrient limited media. 3 To determine the role of extracellular enzymes Iaccases, lignin peroxidases and Mn peroxidases that are secreted by lignin degrading fungi during coal ...
to coal solubilization research that will be analyzed in this study. Sub-section 2.1 explains coal conversion and clean coal technology utilization. ... namely Solubilization and Depolymerization. In his research, the Solubilization process utilizes microfungi and aerobic bacteria while the depolymerization process utilizes ...
One possible suggested that several compounds produced by micro- route to liquefaction is the depolymerization of the coal organisms, such as alkaline substances, oxidative and and cleavage of various links. ... could be involved in a reduction of oxygen content via transformation of CdO the microbial solubilization of coal.4 Most filamentous ...
Jun 11, 2020 The solubilization of low-rank coal by fungi is not accompanied by its depolymerization, which was proven by several programs. A total number of 728 fungal strains were yet tested for solubilizing a German low-rank coal . The coal were used oxidatively pretreated 3 H,O, and natively. During the first , the nitrogen content of the media were reduced to select fungi, which solubilize coal ...
Jan 15, 2005 Marticgmx.net 358-919159321 Fax 358-919159322 University of Helsinki, Viikki Biocenter, Department of Applied Chemistry and Microbiology, P.O. Box 56 ...
Oct 01, 2009 Sucrose was the best suitable carbon source for coal depolymerization by P. djamor and sodium nitrated followed by urea was the best nitrogen source. The Chelators like salicylic acid, TEA and metal ions Mg , Fe , Ca , Cu , Mn has enhanced the lignite solubilization process.
This report concerns our research on base-catalyzed coal solubilization and a new approach for hydrogen addition. The work on base-catalyzed, chemical solubilization is continuing. this report is focused on the hydrogenation research. Specifically it deals with the use of arene chromium carbonyl complexes as reagents for the addition of ...
US4914024A US07146,622 US14662288A US4914024A US 4914024 A US4914024 A US 4914024A US 14662288 A US14662288 A US 14662288A US 4914024 A US4914024 A US 4914024A Authority US United States Prior art keywords coal bacterial culture solubilization medium sup Prior art date 1988-01-21 Legal status The legal status is an assumption and is not a legal conclusion.
yields a solution of coal macromolecules, principally humic acids.7 It is recognized that low rank coals and oxidized coals were more susceptible to solubilization by the wood-rot fungus Coriolus versicolor and by a range of other fungal species.8 These findings
Depolymerization and solubilization of chemically pretreated powder river basin subbituminous coal by manganese peroxidase MnP from Bjerkandera adusta Fuel Journal October 1, 2013 Other authors
Biological coal conversiondegradation can be classified into three mechanisms solubilization, depolymerization, and utilization. Coal solubilization occurs in the presence of alkaline substances, chela-tors, and surfactants, resulting in a black liquid. Coal depolymer-ization utilizes enzymes that function at a pH lower than 6. On the
Oct 01, 2013 The enzymatic depolymerization and solubilization of pretreated coal was carried out in the same 1.5-ml HPLC vials at ambient temperature for 24 h. The reaction system was comprised of a sodium malonate buffer 50 mM, pH 4.5, MnCl 2 25 mM, 1 total Unit MnP 1 U ml 1 , dimethylformamide 0.05 and H 2 O 2 stock solution 150 mM, 2 l h 1 .
on the coal, allowing humified organic matter HOM to be released through solubilization or depolymerization in the first case, LRC solubilization leads to the forma-tion of dark-colored liquid droplets, enriched in HOM, that occur at high pH values pH 710 and is due to the action of alkalis, chelating agents, surfactants and certain
Subbituminous coal, which has the rank in between the other two coals, gave medium solubilization values under all conditions employed. For further study lignite was used along with other carbon and nitrogen sources for increase the efficiency of depolymerization.
microorganism. Coal solubilization is expected to occur in nutrient rich media whereas depolymerization of solubilized coal macromolecules is expected to occur in nutrient limited media. 3 To determine the role of extracellular enzymes Iaccases, lignin peroxidases and Mn peroxidases that are secreted by lignin degrading fungi during coal ...
fundamental questions are in what extent the coal polymers can be solubilized and depolymerized and how is the bioavailability of these constituents. Our research effort is to optimize the solubilization and depolymerization of coals by a variety of means, including physical, chemical and enzymatic methods. The objectives of our research will
