Effect of microwave irradiation on petrophysical ...

The experimental work described in this paper aims to study the effect of microwave irradiation on petrophysical characterization of coals. Twenty coal samples were irradiated at 2.45 GHz with ...

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Isolation, Characterization, and Polyaromatic Hydrocarbon ...

2001-12-1 · Two new polyaromatic hydrocarbon-degrading marine bacteria have been isolated from burrow wall sediments of benthic macrofauna by using enrichments on phenanthrene. Strain LC8 (from a polychaete) and strain M4-6 (from a mollusc) are aerobic and gram negative and require sodium chloride (>1%) for growth. Both strains can use 2- and 3-ring polycyclic aromatic hydrocarbons as their sole …

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Wood and Combination Wood‐Fired Boiler Ash Characterization

1996-9-1 · The impact of burning sludge and combinations of coal and wood residue on ash metal concentrations is presented. Levels of PCDD/Fs in ash resulting from combustion of inland wood residue, salty wood, or bleached mill sludge with wood residue are reviewed, as are the levels of PCDD/Fs in ashes and soot resulting from residential wood ...

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Qualitative characterization of SRM 1597a coal tar for ...

2017-6-29 · A normal-phase liquid chromatography (NPLC) fractionation procedure was developed for the characterization of a complex mixture of polycyclic aromatic hydrocarbons (PAHs) from a coal tar sample (Standard Reference Material (SRM) 1597a). Using a semi-preparative aminopropyl (NH2) LC column, the coal tar sample was separated using NPLC based on the number of aromatic carbons; a …

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Cogasification performance of deashed coal with various ...

2021-4-1 · Cogasification performance of deashed coal with various biomass. Jenny Rizkiana 1,2,3, Sandy Fajar Maulana 1, Ghiffary Azka Nur Aulia 1, Nasywa Kamilah 1, Reyhan Fitri Ananda 1, Naafi Fauzan Mahendraputra Sastrohutomo 1, Edo Muhammad Nashirudin Latif 1, Winny Wulandari 1 and Dwiwahju Sasongko 1. Published under licence by IOP Publishing Ltd IOP Conference Series: …

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Characterization of coal before and after supercritical ...

2013-5-1 · The solvent and swelling effects of supercritical CO 2 on coal structure and porosity were examined using high-resolution field-emission scanning electron microscopy (FE-SEM) and surface area techniques to investigate any irreversible CO 2 induced alterations of the micro-, meso-, and macropores. Dry, 1 in. unconfined cores of Pittsburgh and Sewickly bituminous coals were exposed to ...

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Cleat-scale characterisation of coal: An overview ...

2017-3-1 · FIB-SEM and X-ray CT characterization of interconnected pores in high-rank coal formed from regional metamorphism J. Pet. Sci. Eng., 148 ( 2017 ), pp. 21 - 31 Article Download PDF View Record in Scopus Google Scholar

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Characterization of low-temperature coal ash behaviors at ...

2008-4-1 · Coal ash is the main product of mineral matters in coal during its utilization. The coal ash causes many problems during combustion and gasification. The deposits on heating transfer surfaces affect the heat transfer intensity and lead to unexpected shutdowns as well as decreasing the lifetime of equipments [1], [2], [3] .

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Characterization of Atmospheric Organic Carbon and …

2010-3-31 · ABSTRACTConcentrations of organic carbon (OC) and elemental carbon (EC) in atmospheric particles were measured in Tianjin during January, April, July and October in 2008. The 24-h PM2.5 (particles with aerodynamic diameters less than 2.5 micrometer [μm]) and PM10 (particles with aerodynamic diameters less than 10 micrometer [μm]) samples were simultaneously collected every …

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Development and characterisation of charcoal briquettes ...

2018-11-9 · Charcoal briquettes are inexpensive solid fuels made from carbonized biomass. The potential of converting water hyacinth (Eichhornia crassipes) charcoal into briquettes with molasses as binder was investigated in this study. Dried water hyacinth was carbonized at a temperature between 350°C to 500°C in a fabricated fine biomass carbonizer. A solution containing 80% by weight …

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Resources | Free Full-Text | A Standard Characterization ...

A key consideration for responsible development of mineral and energy resources is the well-being of workers. Respirable dust in mining environments represents a serious concern for occupational health. In particular, coal miners can be exposed to a variety …

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Discriminant Model of Coal Mining Microseismic and ...

Generally, there are two important types of microseismic (MS) signals caused by mining and blasting activities at coal mines. The waveform characteristics of MS signals using FFT, STA/LTA method, and envelope analysis were studied to distinguish these two types of MS signals. The main results are as follows: the dominant frequency and duration of two types of signals are significantly different.

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Synthesis, characterization and enhanced photocatalytic ...

2016-1-26 · It is known that the combination of TiO 2 and graphene and the control of TiO 2 crystal facets are both effective routes to improve the photocatalytic performance of TiO 2.Here, we report the synthesis and the photocatalytic CO 2 reduction performance of …

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Characterization of a new Hencken burner with a transition ...

2018-2-14 · @article{osti_1540132, title = {Characterization of a new Hencken burner with a transition from a reducing-to-oxidizing environment for fundamental coal studies}, author = {Adeosun, Adewale and Huang, Qian and Li, Tianxiang and Gopan, Akshay and Wang, Xuebin and Li, Shuiqing and Axelbaum, Richard L.}, abstractNote = {In pulverized coal burners, coal particles usually transition from a locally ...

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Three-dimensional quantitative fracture analysis of tight ...

2017-5-12 · Non-destructive characterization of coal samples from China using microfocus X-ray computed tomography. Int. J Coal Geol. 80, 113–123, doi: 10.1016/j al.2009.08.001 (2009).

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Chemical Characterization of Fine and Coarse Particles in ...

2010-8-10 · ABSTRACTParticulate matter was collected at Gosan, Korea, a remote location in the East China Sea, from late-March through May, 2007. Two sizes of particles, fine (PM2.5) and coarse (PM10–2.5) modes, were analyzed for chemical composition. Samples were analyzed by mass, elemental and organic carbon, and inorganic ions. Organic molecular markers were also measured …

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Development of a Rapid Coal Analyzer Using Laser-Induced ...

2018-6-1 · Determination of coal quality plays a major role in coal-fired power plants and coal producers for optimizing the utilization efficiency and controlling the quality. In this work, a rapid coal analyzer based on laser-induced breakdown spectroscopy (LIBS) was developed for rapid quality analysis of pulverized coal.

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Acoustic Emission Characteristics and Damage Evolution of ...

2020-1-11 · To obtain a comprehensive understanding of the difference between deep and shallow rocks, and the damage evolution laws of a rock mass at different depths, a case study was conducted on the Pingdingshan Coal Mine. Mechanical behavior and real-time acoustic emission (AE) testing were carried out to investigate the spatiotemporal evolution of the damage in coal at different depths under triaxial ...

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Characterization of Primary Organic Aerosol from Domestic ...

2021-3-12 · An aerosol chemical speciation monitor (ACSM) was deployed to study the primary nonrefractory submicron particulate matter emissions from the burning of commercially available solid fuels (peat, coal, and wood) typically used in European domestic fuel stoves. Organic mass spectra (MS) from burning wood, peat, and coal were characterized and intercompared for factor analysis against …

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(PDF) H/C versus O/C atomic ratio characterization of ...

Application of the H/C and O/C atomic ratios plotted into the van Krevelen''s diagram is well known approach for chemical characterization of coals, more precisely, of their organicpart.

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(PDF) H/C versus O/C atomic ratio characterization of ...

H/C versus (O/C atomic ratios for the selected coals; shown are coalification paths for liptinite (and cutinite), huminite-vitrinite and inertinite as published by B u s t i n et al. (1983) after ...

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Characterization of coal and fly ash (generated) at coal ...

2020-1-1 · Characterization of samples. Fly ash samples were sieved and dried at 105 °C for 24 h. Lateron characterized by using different analytical equipments such as XRD, SEM/EDS, XRF, DLS and FTIR using standard methods for sample preparation and analysis. Proximate analysis data of coal was obtained from GTTP, Gandhinagar.

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Characterization of superhigh-organic-sulfur Raša coal ...

2020-1-2 · The Raša coal has been recognized for its unusually high (superhigh) organic sulfur content and the consequent properties of the coal, such as an anomalously high thermoplasticity for the high volatile B bituminous (0.69% R max) coal rank. The sample studied here had 9.87% organic sulfur out of 9.92% total sulfur (both on ash basis).

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COAL CHARACTERISTICS

2016-12-8 · CCTR Indiana Center for Coal Technology Research 6 COAL RANK Anthracite coal is a dense, hard rock with a jet- black color & metallic luster. It contains between 86% and 98% carbon by weight, & it burns slowly, with a pale blue flame & very little smoke

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(PDF) Preparation and characterization of activated carbon ...

Preparation and characterization of activated carbo n from lignite coal by chemical activation and its application / IJCEES (2012) Vol 3(3)28-39 International Journal of Chemical and Environmen ...

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A Case Study of PM2.5 Characterization in Bangi, Selangor ...

2015-4-30 · A case study was carried out to characterize the ambient PM 2.5 based on ground-based sampling in Bangi, Selangor, Malaysia in September, 2013 during the southwest monsoon season. We determined the total mass concentration, organic carbon, elemental carbon (EC), and metals in PM 2.5 samples. The mean PM 2.5 mass concentration was 44.5 µg m –3, showing that it exceeded the …

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Coalbed methane adsorption and desorption characteristics ...

2016-4-20 · Abstract. Effects of particle size on CH 4 and CO 2 adsorption and desorption characteristics of coals are investigated at 308 K and pressures up to 5.0 MPa. The gas adsorption and desorption isotherms of coals with particle sizes ranging from 250 μm to 840 μm are measured via the volumetric method, and the Langmuir model is used to analyse ...

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The acidic nature of "NMR-invisible" tri-coordinated ...

2019-9-12 · The unambiguous characterization of different acid sites in zeolites is of great importance for understanding their catalytic performance and the rational design of highly efficient zeolite catalysts. In addition to various well-characterized extra-framework Al species, a tri-coordinated framework aluminum s

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Thermal analysis and kinetic study of Petroşani bituminous ...

2011-12-1 · Solid fuels represent one of the most used sources of energy in many countries. In terms of ranking for the coal deposits, Romania occupies the 26th place in the world, and the 11th place in Europe, with reserves of 22 million tones of bituminous coal (BC) and 472 million tones of lignite. The National Bituminous Coal Company extracts the most significant amount of BC from the Jiu Valley …

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Characterization of PAHs and PCBs in Fly Ashes of Eighteen ...

2016-11-30 · ABSTRACTFor the management of coal fly ashes (CFAs) from coal-fired power plants (CFPPs), characterization of PAHs and PCBs in CFAs is imperative. The 18 PAH and 86 PCB congeners in CFAs collected from 18 large-scale CFPPs in China were detected using GC/MS system. The PAH concentrations were in the range of 5.51–70.9 ng g–1 for 16 CFPPs with individual block power …

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A life cycle comparison of disposal and beneficial use of ...

2007-7-25 · Background, Goal, and Scope Currently, only 40%, or 44.5 million metric tons, of coal combustion products (CCPs) generated in the United States each year by electric utilities are diverted from disposal in landfills or surface impoundments and recycled. Despite promising economic and environmental savings, there has been scant attention devoted to assessing life cycle impacts of CCP …

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Controlling spinning pitch property by tetrahydrofuran ...

2019-5-23 · Abstract Isotropic pitch-based carbon fiber was successfully prepared from tetrahydrofuran-soluble fraction of coal tar pitch co-carbonization with petrolatum by air-blowing. The effects of reaction temperature and time, amount of petrolatum added on …

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(PDF) Characterization of Coal Fly Ash for Use in ...

Characterization of Coal Fly Ash for Use in Synthesis of Zeolites ... and equipments for carrying out the analyses. ... Presented here is a method by which part of the silicon in fly ash can be ...

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(PDF) Characterization of Slovenian coal and estimation of ...

Characterization of Slovenian coal and estimation of coal heating value based on proximate analysis using regression and artificial neural networks September 2013 Central European Journal of ...

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