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  • Design of experiments to optimize the extraction

    08/09/2018· Solvent extraction of a high ash, low grade non-coking Indian coal, Kedla coal was performed using pre-treatment with acetic acid followed by extraction with

  • Design of experiments to optimize the extraction

    Design of experiments to optimize the extraction parameters of a power grade Indian coal Heena Dhawan1 • Sreedevi Upadhyayula2 • D. K. Sharma1 Received:

  • [PDF] Design of experiments to optimize the extraction

    Low grade high ash coals with difficult physical washability characteristics require chemical cleaning techniques such as solvent extraction to obtain super clean coal with lower ash contents. Kedla, an Indian low grade coal has ash content around 44%–50% and there is a need to maximize its solvent extraction yield so as to make this power grade coal industrially useful.

  • Design of experiments to optimize the extraction

    The coal was pre-treated with acetic acid before extractions were carried out. The parameters such as the acid pre-treatment time, acid concentration, particle size, the co-solvent concentration and the solvent concentration were optimized in this paper. With this design of experiments technique about 40% of the organic matter with minimal ash (less than 2%) content was rendered extractable unlike the already

  • Extraction and Swelling of Low-Rank Coals with Various

    19/09/1996· Low-rank coals were extracted with various solvents under ultrasonication at room temperature. In the case of single solvent extraction, N-methyl-2-pyrrolidinone (NMP) gave the highest extraction yield for Loy Yang coal, 14.3 wt % (daf). Among the mixed solvents used in this study, NMP−methanol (8:2) and NMP−water (3:1) mixed solvents gave the high yields, 15.3 and 15.1 wt %

  • Clean Coal Technologies set to revolutionize coal industry

    12/04/2021· The changes were the result of close collaboration between the company’s engineers and the University of Wyoming’s (UofWY) School of Energy Research, who partnered with the company in 2017 to help optimize its technology for coal beneficiation and for the extraction of coal byproducts critical issues facing the PRB coal-producing region. The UofWY’s School of Energy Research is one

  • Design of experiments to optimize the extraction

    Design of experiments to optimize the extraction parameters of a power grade Indian coal Heena Dhawan1 • Sreedevi Upadhyayula2 • D. K. Sharma1 Received:

  • Optimization of vanadium (IV) extraction from stone

    01/07/2017· Thus, in order to further improve the extraction percentage, the optimization of vanadium (IV) extraction from stone coal leaching solution was studied by ELM using RSM in this study. Parameters such as paraffin concentration, D2EHPA concentration, span80 concentration and H 2 SO 4 concentration were studied using statistical design Box–Behnken and response surface method.

  • Clean Coal Technologies set to revolutionize coal industry

    12/04/2021· The changes were the result of close collaboration between the company’s engineers and the University of Wyoming’s (UofWY) School of Energy Research, who partnered with the company in 2017 to help optimize its technology for coal beneficiation and for the extraction of coal byproducts critical issues facing the PRB coal-producing region. The UofWY’s School of Energy Research is one

  • Aqueous Biphase Extraction for Processing of Fine Coal

    conditions that optimize the selective transfer of coal into the top phase while retaining the mineral matter in the bottom phase. An additional goal is to develop an improved coal-pyrite separation technique based on aqueous biphase extraction. The partitioning behavior of selected model oxides (al- hematite, s~lca and titania) in aqueous biphase systems and the effects of some surfactants

  • Extraction and Swelling of Low-Rank Coals with Various

    19/09/1996· Low-rank coals were extracted with various solvents under ultrasonication at room temperature. In the case of single solvent extraction, N-methyl-2-pyrrolidinone (NMP) gave the highest extraction yield for Loy Yang coal, 14.3 wt % (daf). Among the mixed solvents used in this study, NMP−methanol (8:2) and NMP−water (3:1) mixed solvents gave the high yields, 15.3 and 15.1 wt %

  • 4 Coal Mining and Processing Coal: Research and

    Small percentage increases in coal recovery through improved coal preparation processes and improved mining methods, perhaps including in situ extraction, have the potential to significantly expand economically recoverable reserves of both eastern and western coals. The development of these technologies, increasingly needed as coal reserve quality decreases over time, will help to maximize

  • Ethylenediamine-Assisted Solvent Extraction of Coal in N

    04/12/2001· Coals ranging from lignite to high rank bituminous coal were extracted with N-methyl-2-pyrrolidone (NMP), ethylenediamine (EDA), and NMP containing a small amount of EDA (e,N) under reflux conditions at atmospheric pressure. The extraction yield was maximum in the third case suggesting a synergistic effect of the system. The system was found to enhance the extraction yield in NMP.

  • Clean Coal Technologies Inc set to revolutionize coal

    08/04/2021· The coal cleaning process ensures the carbon in coal maintains its structural integrity during the heating process, while the volatile matter — often polluting heavy metals — turns into liquids and gas and escapes the coal. The technology is handy as deposits with high moisture coal emit less energy than low moisture coal. Think about trying to burn wet logs to warm a room. You need more logs and it takes longer. The same applies to coal. The higher the moisture content of coal

  • Coal as an avenue to low-cost carbon fibers

    18/10/2017· In another effort, engineers from the University of Utah (Salt Lake City, UT, US) launched, in October 2016, a US$1.6 million, three-year project to research “cost-effective, carbon-friendly methods” for converting coal pitch into carbon fibers, and to evaluate the process’s market potential for revitalizing Utah’s coal communities, which have been threatened by a nationwide decline in coal extraction.

  • methodology for determining the evolution law of gob

    16/03/2016· Using this methodology, the evolution law of permeability in the gob and the permeability distribution are deduced. It is very useful to optimize the GGV parameters and placement. Many coal mines in Huainan and Huaibei City made use of this methodology to forecast the permeability distribution in the gob to further capture methane. Thus, the methodology of this paper is useful for gob gas