Coal Organic matter ratio

Hydrocarbon generation potential evaluation via

2024年1月9日  The amounts of organic matter in this coal are high (TOC = 629% and S2 = 2321 mg HC/g rock), but immature (T max = 4158 °C) The S1, S2 and TOC values indicate 2023年7月1日  The leaching tests show that the organic matter in coal has a relatively strong adsorption capacity for REY, and that the average adsorption rate or the net adsorption Adsorption of rare earth elements on organic matter in coal2021年10月1日  The proximate analysis and Pr/nC 17 values of nalkanes reflect the high organic matter maturity The macerals of coal and coaly mudstone are mainly stable liptinite Organic matter provenance and accumulation of transitional facies coal 2021年7月28日  Similar to the oxidation process of aerosphere, the mild oxidation of H 2 O 2 could degrade some highmolecularweight constituents of organic matter in coal, and Characterization of humic acids from original coal and its

Maceral and Organic Geochemical

2021年1月15日  Organic geochemical characteristics of coal are frequently used to evaluate essential information regarding the coalforming plant communities, depositional environment, and the maturity level of organic matter (6−9) For 2019年4月18日  Coal rank can be determined by chemical parameters, such as amount of organic carbon (dry, ashfree), the atomic H/C ratio, and the atomic O/C ration (Orem and The Origin and Classification of Coal SpringerLink2021年2月8日  Coal consists mainly of solid organic matter with an atomic hydrogen to carbon ratio ranging from 01 to 4 Therefore to produce liquids from coal requires breaking down the Influence of coal properties on coal conversion processescoal 2022年5月2日  The amount of methylene groups in the aliphatic part of coal macromolecules had a direct impact on conversion of the coal organic matter into soluble products The team has The relationship between the molecular composition of coal

Synergistic Effect of Small Molecular Organic

2023年12月18日  Yao et al (26) found that small molecular organic matter in coal affects the CH 4 adsorption of coal by changing the surface functional groups and pore structure of coal according to the experimental observation2013年1月1日  Organic maturation is also referred to as organic diagenesis, organic metamorphism, and as coalification when referring to coal Organic matter is a minor component in most sedimentary rocks, however its importance by far outweighs its abundance Organic matter comprises the fossil fuel resources petroleum and coalMaturation, organic SpringerLink2021年7月28日  These oxidative solubilization effects, such as oxidizing weak –C–O– linkage in coal, produced CO 2 and watersoluble organic compounds 25, changed the structure of organic matter, and thus Characterization of humic acids from original coal and its2023年11月23日  Dissolved organic matter (DOM) regulates and controls the transformation and bioavailability of metals in coal mines Water samples were collected from the goafs of the Xinjulong coal mine The dissolved oxygen (DO) was less than 40 mg/L and the oxidation–reduction potential (ORP) ranged from 985 to 2546 mV; that is, the environment Composition and Sources of Dissolved Organic Matter in

Organic matter parameters in WWTP – a critical review and

2021年9月24日  The COD to organic dry matter ratios for the four sludge types are shown as distributions in Figure 3 A distinction is made between four different ratios: CODt/VS, CODt/VSS, CODp/VS, CODp/VSS with CODp (particulate)=CODtCODs Since the present work is intended to characterize the properties of sludge streams, it is obvious to relate these 2003年11月30日  Note the increasing simplicity of the spectra as rank increases, reflecting the loss of oxygencontaining organic matter such as cellulose, phenols, and methoxyls(PDF) Coal Formation and Geochemistry ResearchGate2024年1月9日  Coal rank refers to the coal organic matter metamorphism (coalification), or coal maturity and measure of the degree of coal evolution from peat to metaanthracite 62 High rank coal has high R o Hydrocarbon generation potential evaluation via 2024年1月15日  In this paper, the influence of zerocarbon ammonia cofiring ratio during coal/ammonia combustion on the generation of condensable particulate matter(CPM) was investigated 0%, 10%, 20%, 30% and 50% ammonia were mixed into the coal combustion according to the energy input ratio to collect the discharged CPM and FPM in laboratory and Effect of ammonia cofiring ratio on the formation of

The assessment of maturation changes of humic coal organic matter

2016年1月15日  In contrast to the 22R and 22S isomer pair, consistent diminishments in the ββ/(αα + ββ) and 20S/(20S + 20R) ratios accompanied by generation of the C 29 5αsterane isomers ( Figures 5 and 2022年3月1日  In addition, as an important product of RICO, BCAs can also reflect the aromatic ring polycondensation structure of coal organic matter to a certain extent Lv et al Moreover, there is a good correlation between H/C ratio of coal and conversion or oil yield of direct liquefaction [12, 38, 39] However, the chemical structure of suitable A study on the structure of Naomaohu coal and its suitability 2020年3月24日  Soil organic matter (SOM) is a crucial indicator for evaluating soil quality and an important component of soil carbon pools, which play a vital role in terrestrial ecosystems Rapid, nondestructive and accurate monitoring of SOM content is of great significance for the environmental management and ecological restoration of mining areas Visiblenearinfrared Assessing Soil Organic Matter Content in a Coal Mining Area 2022年9月1日  The biodegradation of organic matter (OM) and the generation of SBG are part of the same process [8], [9], [10] According to Peters et al [11], biodegradation is generally evidenced by the reduction of heavy hydrocarbon components, the generation of biogenic CO 2, and the enrichment of SBG (dryness index C 1 /ΣC 1 −5 > 95%) Shelton et al [12] suggested Biodegradation of coal organic matter associated with the

Spatial distribution of soil organic matter in a coal

2023年8月26日  Soil organic matter; underground coal mine; 3D stochastic simulation; soil spatial variability; precision agriculture Introduction Coal energy accounts for over 70% of the total primary energy production in China (Yi et al 2014) Coal has made great contributions to Chinese economic development, and annual coal production has risen to over 32017年9月14日  Coal is physically, chemically, and thermally altered peat Peat is partially decayed plant material, mineral matter, and water, which accumulates in anoxic swamps or mires (peatforming wetlands) Peats generally have organic contents greater than 75%, inorganic mineral contents less than 25%, and water contents of 75–90% (Schopf 1966; Jarrett 1983; Coal SpringerLink2023年2月1日  1 Introduction Coal, as a particular sedimentary organic ore deposit, has a reduction and adsorption barrier Coal enriches not only inorganic mineral matter (nonmineral elements, crystalline minerals, and noncrystalline mineraloids) but also contains abundant organic components (or maceral) (Dai et al, 2018a; b, 2020; Liu et al, 2022)The maceral Geochemistry of Late Permian coals from the Moxinpo mine, 2009年2月1日  42 Variations of soluble organic matter (SOM) yield of the coals The amount of soluble organic matter (SOM) normalized to the organic carbon content (mg/g TOC) obtained from the coal samples by Soxhlet extraction with DCM is listed in Table 1 and the vertical profile variations are shown in Fig 2 together with the relative proportions of saturated hydrocarbons, Reconstruction of floral changes during deposition of the

Pitfalls of Using Biomarker Maturity Parameters for Organic Matter

2022年4月2日  Accordingly, we propose that isomer concentration is an essential tool to validate maturity estimation of organic matter by isomer ratios, especially for highly mature oils and sediment extracts The assessment of maturation changes of humic coal organic matter—Insights from closedsystem pyrolysis experiments Int J Coal Geol 2016 2016年1月15日  The results of maceral analysis are reported with mineral matter included (Table 1)The subbituminous coal (26C) is characterised by high contents of vitrinite (569 vol%) and liptinite (233 vol%) and a relatively low content of inertinite (66 vol%)The dominant maceral of the vitrinite group is collodetrinite, while the contents of collotelinite, gelinite, corpogelinite and The assessment of maturation changes of humic coal organic matter 2015年1月1日  313 Volatile Matter and Fixed Carbon in Coal 3131 Volatile Matter The yield of volatile organic substances after heating coal isolated from the air under specified conditions is referred to as the volatile matter (V)The volatiles generated from coal under such conditions include the gaseous products from pyrolysis of organic matter in coal, water vapor generated Chemical Characteristics of Coal SpringerLink2014年7月19日  Facies change from the coaly shale layers (PhaseI) to the coal layers (Phase11) was accompanied by variations in origin of the organic matter The source of the organic matter was mainly (PDF) Upper Eocene coal and coaly shale in the Central

Weatheringinduced organic matter enrichment in marine

2024年8月30日  Organic matter (OM)rich shales are important hydrocarbon source rocks and reservoirs in sedimentary basins A total of 35 OMrich shales have been reported during earth's evolution with depositional ages back to 35 Ga (cf Zou et al, 2019; Jin et al, 2023)The exploration of shale oil and gas in petroliferous basins, such as those in North America and 2019年4月1日  The remainder of the organic matter acts as the storage reservoir by developing nanoscale pores which hold generated hydrocarbons (Curtis et al, 2012; Chen and Xiao, 2014) Furthermore, the process of thermal maturation will cause or enhance the development of local heterogeneities within the remaining organic matter (Kong et al, 2018)Understanding organic matter heterogeneity and maturation 2009年2月1日  The distribution of aromatic hydrocarbons and stable carbon isotope ratios of organic matter in a series of nine Miocene Embalut coal samples obtained from nine coal seams of Kutai Basin, East Reconstruction of floral changes during 5 天之前  Conversion In general, coal can be considered a hydrogendeficient hydrocarbon with a hydrogentocarbon ratio near 08, as compared with a liquid hydrocarbons ratio near 2 (for propane, ethane, butane, and other forms of Coal Uses, Types, Pollution, Facts Britannica

Organic matter provenance and depositional environment of

Anomalously low C 29 20S/(20S + 20R) and C 29 ββ/(ββ + αα) sterane ratios are present in all the samples, and are interpreted as due to the terrigenous organic matter input or the coalrelated depositional environment In addition, biomarkers and iron sulfide morphology indicate that the organic matter of the mudstones deposited in a 2022年2月9日  Depositional environment is the dominant factor in determining the types of organic matter found in a rock Only two types of organic matter are found in rocks: land derived and aquatic algae derived Heat and pressure convert organic matter into a substance called humin and then into kerogen Time and temperature convert kerogen into petroleumKerogen AAPG Wiki2022年12月1日  The terrestrial organic matter (vascular land plants) shows a ratio higher than 20, while it lies between 4 and 10 for marine organic matter (algae) (Meyers, 1994) The TOC/TN ratio for the current study varies from 20 to 40 which suggest the dominance of vascular land plants like ferns, conifers, lycophytes, etc, flourished during the Permian Organic petrography and stable isotopic characteristics of 2024年11月15日  This study analyzed the dissolved organic matter (DOM) released by adsorbent during wastewater treatment It was found that the adsorption method resulted in an organic removal efficiency of over 97 % for coaltoolefin (CTO) wastewater, with the lowest value of On the FTICR mass spectrometry analysis of dissolved organic matter

Dissolved organic matter composition and fluorescence

2023年3月11日  Coal mine drainage (CMD) discharged into surface waters results in serious environmental pollution risk to rivers, lakes, and reservoirs Coal mine drainage generally contains a variety of organic matter and heavy metals due to coal mining activities Dissolved organic matter (DOM) plays an important role in the physicochemical and biological processes of 2014年5月1日  The spatial arrangement and abundance of the elements: C, H, N, O, S often correlate or directly influence a plethora of coal properties For > 90 years, attempts have utilized the ultimate (elemental) analysis of coal to predict a wide variety of properties such as: calorific value (higher heating value), volatile matter, vitrinite reflectance (mean maximum), Hardgrove A review of the correlations of coal properties with elemental 2008年10月2日  Based upon our results and the results of Ahmed et al (1999) and Ahmed and Smith (2001), it may be possible that comparing coal and sedimentary organic matter biodegradation to petroleum and crude oils is insufficient and it may be necessary to develop a specific biodegradation scheme for coals and sedimentary hosted organic matterBiodegradation of sedimentary organic matter associated with 2013年1月1日  Organic maturation is also referred to as organic diagenesis, organic metamorphism, and as coalification when referring to coal Organic matter is a minor component in most sedimentary rocks, however its importance by far outweighs its abundance Organic matter comprises the fossil fuel resources petroleum and coalMaturation, organic SpringerLink

Characterization of humic acids from original coal and its

2021年7月28日  These oxidative solubilization effects, such as oxidizing weak –C–O– linkage in coal, produced CO 2 and watersoluble organic compounds 25, changed the structure of organic matter, and thus 2023年11月23日  Dissolved organic matter (DOM) regulates and controls the transformation and bioavailability of metals in coal mines Water samples were collected from the goafs of the Xinjulong coal mine The dissolved oxygen (DO) was less than 40 mg/L and the oxidation–reduction potential (ORP) ranged from 985 to 2546 mV; that is, the environment Composition and Sources of Dissolved Organic Matter in 2021年9月24日  The COD to organic dry matter ratios for the four sludge types are shown as distributions in Figure 3 A distinction is made between four different ratios: CODt/VS, CODt/VSS, CODp/VS, CODp/VSS with CODp (particulate)=CODtCODs Since the present work is intended to characterize the properties of sludge streams, it is obvious to relate these Organic matter parameters in WWTP – a critical review and 2003年11月30日  Note the increasing simplicity of the spectra as rank increases, reflecting the loss of oxygencontaining organic matter such as cellulose, phenols, and methoxyls(PDF) Coal Formation and Geochemistry ResearchGate

Hydrocarbon generation potential evaluation via

2024年1月9日  Coal rank refers to the coal organic matter metamorphism (coalification), or coal maturity and measure of the degree of coal evolution from peat to metaanthracite 62 High rank coal has high R o 2024年1月15日  In this paper, the influence of zerocarbon ammonia cofiring ratio during coal/ammonia combustion on the generation of condensable particulate matter(CPM) was investigated 0%, 10%, 20%, 30% and 50% ammonia were mixed into the coal combustion according to the energy input ratio to collect the discharged CPM and FPM in laboratory and Effect of ammonia cofiring ratio on the formation of 2016年1月15日  In contrast to the 22R and 22S isomer pair, consistent diminishments in the ββ/(αα + ββ) and 20S/(20S + 20R) ratios accompanied by generation of the C 29 5αsterane isomers ( Figures 5 and The assessment of maturation changes of humic coal organic matter 2022年3月1日  In addition, as an important product of RICO, BCAs can also reflect the aromatic ring polycondensation structure of coal organic matter to a certain extent Lv et al Moreover, there is a good correlation between H/C ratio of coal and conversion or oil yield of direct liquefaction [12, 38, 39] However, the chemical structure of suitable A study on the structure of Naomaohu coal and its suitability

Assessing Soil Organic Matter Content in a Coal Mining Area

2020年3月24日  Soil organic matter (SOM) is a crucial indicator for evaluating soil quality and an important component of soil carbon pools, which play a vital role in terrestrial ecosystems Rapid, nondestructive and accurate monitoring of SOM content is of great significance for the environmental management and ecological restoration of mining areas Visiblenearinfrared

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