extraction coal multistep

Multistep extraction of coal - ScienceDirect

1991-12-1  In this paper, multistep extraction is studied as a method of extracting solubles from coal; it will be a series of extractions using different solvents, or extractions with a selected good solvent after a series of treatments to disrupt various secondary interactions without cleaving covalent bonds.

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Small molecules from multistep extraction of coal and ...

2020-9-9  The results show that the multistep extraction of coal mainly includes aromatic compounds, aliphatic substances and some heteroatom matter; as the metamorphic degree of coal rose, the types and contents of compounds in the extracts decreased. (2) The size of the pore volume was concentrated at 3-4 nm. The change in the pore structure of the coal samples was related to the coal rank after extraction,

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Small molecules from multistep extraction of coal and ...

The multistep solvent extractions of coal will lead to the increase of porosity and the removal of small organic molecules in coal. On the one hand, the increase of porosity by extractions can increase the amount of adsorption methane on coal. On the other hand, less methane was adsorbed on coal when less small organic molecules present.

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Improved Extraction Procedures for Coal Products

1996-7-18  A multistep extraction procedure was also studied. Keeping most of the advantages of single-step Soxtec extraction, it also solves some of its problems (mainly the possibility of saturation) and provides some kinetic data to assess the completeness of the extraction.

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No.1-18 Multi-step Desulfurization of Coal Soluble

The sulfur distribution from the raw coals to products was investigated and the chemical forms of sulfur in the raw coals and coal soluble were identified by XANES analysis. The selective removal behaviour of organic sulfur from the coal soluble during the multistep extraction using the

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Separation and structural characterization of groups

2017-5-1  In this work, a high-volatile bituminous coal was successfully separated into seven groups (G 1 –G 7) with less diversity within each class using multistep extraction followed by column chromatography. The total extraction yield (dmmf) reached up to 56% and the structural characteristics of the seven groups were identified and investigated with a series of analytical techniques.

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Effect of noncovalent bonds on the successive

2013-7-1  Miura et al. proposed solvent extraction method to extract coal using a flowing stream of non-polar solvent to fractionate the coal . But the aim of this method is effective utilization of bituminous coal and low rank coal, and it was found that the yield of extracted fractions below 250 °C was about 40% when tetralin was used as the solvent.

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Desulphurization of Coal Soluble Using Ionic Liquids

2016-10-21  The coal soluble dissolved in 1MN was mixed with - the ionic liquid. This mixed solution was heated at 200°C for a certain time interval with agitation. After the extraction, the mixed solution was cooled to separate the ionic liquid and the soluble. Multistep extraction was - carried out by changing the ionic liquid. 2.4 Analyses

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Finnpipette™ Multistepper Pipette - Thermo Fisher

Design. Universal handle also fits the seven single-channel Thermo Scientific™ Finntip™ Steppers; Lightweight construction minimizes hand fatigue during repetitive dispensing

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Coal Waste to Two-Dimensional Materials: Fabrication

2021-3-12  A two-stage counter-current solid–liquid extraction method was first employed under the mild conditions of 25–60 °C and atmospheric pressure to selectively extract Fe3+ and Mg2+, which were then precipitated out separately upon gradual addition of NaOH and subsequent hydrothermal treatment.

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A Multistep Method for Automatic Determination and ...

2019-6-19  We present an algorithm for P-phase arrival time automatic determination and optimization for microseismic events of a coal mine in steps. For P-phase detection, we apply four modules: single denoising (band-filter), fast searching (STA/LTA and peak value), accurately picking (AIC), and optimization selection (time difference of arrival time and envelope circle judgment).

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Finnpipette™ Multistepper Pipette - Thermo Fisher

Design. Universal handle also fits the seven single-channel Thermo Scientific™ Finntip™ Steppers; Lightweight construction minimizes hand fatigue during repetitive dispensing

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Solvent extraction of Cu, Mo, V, and U from leach ...

2017-9-22  Solvent extraction of Cu, Mo, V, and U from leach solutions ... Hydrometallurgical processes are multistep. Ore or concentrate is crushed and milled, and subjected to enrichment by physical processes and subsequent leaching. ... coal or other organic matter (about 10%). The stabilisation

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Development of a method of extraction and

The extraction was carried out by a multistep procedure divided in: Solubilization: In a system formed by a solvent, an association colloid, and at least one other component (the solubilizate), the incorporation of this latter component into or on the micelles is called micellar solubilization, or, briefly, solubilization4.

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Fly Ash-Based Zeolite-Complexed Polyethylene-Glycol

2020-9-8  The zeolite particles were isolated by the alkaline extraction method from coal fly ash using a multistep process. The sodium silicate solution obtained from this process was used as a silica-aluminum precursor to synthesize zeolite via a sol–gel method using polyethylene glycol (PEG) as the surfactant and sulfuric acid as the catalyst.

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GC/MS analyses of fractionated extraction of Shenfu

2008-11-18  Shenfu coal was extracted with CS2, n-hexane, benzene sequentially. The extracts were analyzed with GC/MS. It is presented that group seperation of soluble organic compounds in the coal can be achieved by fractionated extraction using different solvents. Main components in CS2 soluble fraction from Shenfu coal are alkyl-substituted arenes. Aliphatic hydrocarbons are overwhelmingly

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(PDF) Extraction of Lignite Coal Fly Ash for Polynuclear ...

Extraction of Lignite Coal Fly Ash for Polynuclear Aromatic Hydrocarbons: Modified and Unmodified Supercritical Fluid Extraction, Enhanced-Fluidity Solvents, and Accelerated Solvent Extraction. Journal of Chromatographic Science, 1998. Susan V Olesik. Download PDF. Download Full PDF Package.

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Investigation of coal structure. Quarterly report No. 7 ...

1994-1-1  OSTI.GOV Technical Report: Investigation of coal structure. Quarterly report No. 7, October 1, 1993--December 31, 1993

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Adelaide Research Scholarship: Coal waste to two ...

2020-4-22  High-purity 2-D α-Fe2O3 nanosheets and MgO nanosheets have been successfully fabricated with a high extraction yield of 45 and 25 wt %, respectively, from a brown coal fly ash, an otherwise valueless waste.

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Ambient weathering of magnesium oxide for CO 2

2020-7-3  Alternative systems consider reactions between minerals and concentrated CO 2 in high temperature/pressure reactors or through multistep extraction

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A Multistep Method for Automatic Determination and ...

2019-6-19  We present an algorithm for P-phase arrival time automatic determination and optimization for microseismic events of a coal mine in steps. For P-phase detection, we apply four modules: single denoising (band-filter), fast searching (STA/LTA and peak value), accurately picking (AIC), and optimization selection (time difference of arrival time and envelope circle judgment).

More

Finnpipette™ Multistepper Pipette - Thermo Fisher

Design. Universal handle also fits the seven single-channel Thermo Scientific™ Finntip™ Steppers; Lightweight construction minimizes hand fatigue during repetitive dispensing

More

Solvent extraction of Cu, Mo, V, and U from leach ...

2017-9-22  Solvent extraction of Cu, Mo, V, and U from leach solutions ... Hydrometallurgical processes are multistep. Ore or concentrate is crushed and milled, and subjected to enrichment by physical processes and subsequent leaching. ... coal or other organic matter (about 10%). The stabilisation

More

Development of a method of extraction and

The extraction was carried out by a multistep procedure divided in: Solubilization: In a system formed by a solvent, an association colloid, and at least one other component (the solubilizate), the incorporation of this latter component into or on the micelles is called micellar solubilization, or, briefly, solubilization4.

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Reinventing copper extraction with electricity MIT

2014-5-1  Reinventing copper extraction with electricity ... Replacing the lost copper with new metal produced by the traditional method of cooking copper sulfide ores requires a multistep process to extract the copper and produces troublesome byproducts. ... Greater recycling of steel, which uses electric arc furnaces instead of coal-fired blast ...

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Ambient weathering of magnesium oxide for CO 2

2020-7-3  Alternative systems consider reactions between minerals and concentrated CO 2 in high temperature/pressure reactors or through multistep extraction

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Sources of Organic Compounds - QS Study

2 天前  Coal is another key source of organic compounds. It yields coke and coal-tar on hydrolysis or destructive distillation more than 200 organic compounds have been in a straight line isolated from coal-tar, these coal-tar products from the starting resources for the manufacture of thousands of helpful aromatic compounds, including perfumes, drugs ...

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新能源电力系统国家重点实验室(华北电力大学)

2020-9-24  An automatic control method of heat extraction system in thermal power unit[C]// Chinese Control and Decision Conference. 2017:698-703. [14] Zeng D L, Jian YF, Deng ZG, et al. Modeling and simulation of indoor environment parameters based on least squares [C]// Chinese Control and Decision Conference. 2017:1591-1595.

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清华大学土木水利学院

2021-4-6  国家重点研发计划课题 (2017YFC0403501), 非常规水资源适度性开发利用评价理论和方法, 2017.07-2020.12. 国家重点基础研究发展计划 (973)课题 (2012CB719804), 填埋场渗沥液污染地下环境及防污屏障, 2012.01-2016.12. 教育部自主科研计划重点基础研究专项,2015THZ-02-2, 多孔介质多 ...

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董明哲 - 中国石油大学 - 石油工程学院

2016-5-9  个人简介. 学习与工作经历 中国石油大学 (华东)特聘教授 (全职),博士生导师。. 1982年毕业于西北大学化工系,获工学学士学位;1985年毕业于华东石油学院北京研究生部,获工学硕士学位;1995年毕业于加拿大滑铁卢大学,获博士学位。. 曾先后在加拿大帝国石油 ...

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Development of a method of extraction and

The extraction was carried out by a multistep procedure divided in: Solubilization: In a system formed by a solvent, an association colloid, and at least one other component (the solubilizate), the incorporation of this latter component into or on the micelles is called micellar solubilization, or, briefly, solubilization4.

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Concentric liquid reactors for chemical synthesis and ...

2020-9-30  Recent years have witnessed increased interest in systems that are capable of supporting multistep chemical processes without the need for manual handling of

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Reinventing copper extraction with electricity

2014-5-2  Reinventing copper extraction with electricity. Copper is so valuable that its theft from worksites and power substations has become a national problem. Replacing the

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Examples of Green Chemistry Sustainable Chemistry ...

2 天前  The traditional multistep method to make this medication used large amounts of hazardous reagents and produced a large amount of toxic waste in the process. Professor Yi Tang, of the University of California, created a synthesis using an engineered enzyme and a low-cost feedstock. Codexis, a biocatalysis company, optimized both the enzyme and ...

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(PDF) Extraction technologies for medicinal and

Extraction technologies for medicinal and aromatic plants. 266 Pages. Extraction technologies for medicinal and aromatic plants. Amisadar Riios. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper.

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Sources of Organic Compounds - QS Study

2 天前  Coal is another key source of organic compounds. It yields coke and coal-tar on hydrolysis or destructive distillation more than 200 organic compounds have been in a straight line isolated from coal-tar, these coal-tar products from the starting resources for the manufacture of thousands of helpful aromatic compounds, including perfumes, drugs ...

More

清华大学土木水利学院

2021-4-6  国家重点研发计划课题 (2017YFC0403501), 非常规水资源适度性开发利用评价理论和方法, 2017.07-2020.12. 国家重点基础研究发展计划 (973)课题 (2012CB719804), 填埋场渗沥液污染地下环境及防污屏障, 2012.01-2016.12. 教育部自主科研计划重点基础研究专项,2015THZ-02-2, 多孔介质多 ...

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Brandon Ashfeld // People // Department of

2021-6-18  Carbon capture and separation is an integral part of our energy future, independent of its application to todayâ s coal-fired power plants. Our research program is working toward the development of a strategy to control atmospheric, anthropogenic CO 2 concentrations through the design of energy efficient carbon capture and sequestration materials.

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Separation and purification - Particle electrophoresis

2021-6-19  Separation and purification - Separation and purification - Particle electrophoresis and electrostatic precipitation: As the name implies, particle electrophoresis involves the separation of charged particles under the influence of an electric field; this method is used especially for the separation of viruses and bacteria. Electrostatic precipitation is a method for the precipitation of fogs ...

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于建国 - East China University of Science and Technology

2018-12-10  K-Extraction from Muscovite by the Isolated Fungi, Geomicrobiology Journal, 2015, 32, 771-779. Xiulong Mao, Xingfu Song*, Guimin Lu, Yuzhu Sun, Yanxia Xu, Jianguo Yu* . Control of Crystal Morphology and Size of Calcium Sulfate Whiskers in Aqueous HCl Solutions by Additives: Experimental and Molecular Dynamics Simulation Studies, Industrial Engineering Chemical Research , 2015, 54,

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