Results 201 to 210 of about 41,757 (268)

Optimization of direct coal liquefaction residue extraction

Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2016
ABSTRACTDirect coal liquefaction residue (DCLR) could be extracted using dipropylamine (DPA) to afford extract with polycyclic aromatic structures, and the separation of extract and DPA as well as the recovery of DPA could be achieved by the nonthermal CO2-trigger at room temperature and atmosphere pressure, which would potentially gain huge energy ...
Y. G. Wang, Z. S. Niu, J. Shen, Y. X. Niu, G. Liu, Q. T. Sheng   +5 more
openaire   +1 more source

Direct Co-liquefaction of Hardwood and Coal

2012 Dallas, Texas, July 29 - August 1, 2012, 2012
Co-liquefaction of coal and torrefied biomass was performed in a mechanically stirred and electrically heated Parr reactor to evaluate effects of co-liquefaction and torrefaction on product yields and properties. The test samples were coal, red maple, yellow-poplar, torrefied red maple and torrefied yellow-poplar.
null Saurabh Kumar, null Kaushlendra Singh, null John Zondlo, null Wenjia Jin, null Jingxin Wang, null Jagpinder Singh Brar   +5 more
openaire   +1 more source

Research on performance of direct coal liquefaction residue modified asphalt mortar

Journal of Fuel Chemistry and Technology, 2021
In order to study the performance of DCLR (direct coal liquefaction residue) modified asphalt mortar, different DCLR modified asphalt mortar with different DCLR contents and filler-asphalt ratios (FA) was prepared.
J. Ji, Xinyue Xu, Ying Xu, Zhe Wang, Jiani Wang   +4 more
semanticscholar   +1 more source

Molecular simulation of thermal direct coal liquefaction

Chemical Engineering Science, 1994
Abstract A mechanistic simulation of direct coal liquefaction was developed which utilizes the technique of Monte Carlo simulation for both: (1) the creation of a molecular coal structure and (2) modelling of its subsequent pyrolysis under liquefaction conditions.
W PROVINE, M KLEIN
openaire   +1 more source

Catalysis in Direct Coal Liquefaction

1992
Coal liquefaction can be defined as the conversion of solid coal to products which are liquid at ambient temperatures. Usual methods for direct liquefaction processing are pyrolysis, solvent extraction or hydrogenation. These processes can all be enhanced by the use of catalysts (for example, catalytic pyrolysis or catalytic hydropyrolysis, Exxon Donor
openaire   +1 more source

Direct Coal Liquefaction: Low Temperature Dissolution Process

Energy & Fuels, 2014
The front-end design of a direct coal liquefaction process for the conversion of lignite into coal liquids by solvent extraction was investigated. The experimental work focused on physical coal dissolution in the temperature range 25–150 °C. It was found that the kinetics of physical coal dissolution was rapid and essentially complete within 2 min at ...
Fatemehalsadat Haghighat, Arno de Klerk
openaire   +1 more source

Application of Light Microscopy to Direct Coal Liquefaction Research

Microscopy and Microanalysis, 1998
Light microscopy was used to analyze the effects of added catalyst at different conditions (temperature and reaction times) in liquefaction testing of a low pyritic sulfur bituminous coal. Quantitative changes in vitrinite/vitroplast reflectance of coal and liquefaction residues were shown to be useful markers in analyzing and understanding the ...
, Irdi, , Warzinski, , Booher
openaire   +2 more sources

Organic contaminants in direct coal liquefaction — a preliminary assessment

American Industrial Hygiene Association Journal, 1980
Area samples taken at two coal liquefaction facilities were analyzed by either gas chromatography or gas chromatography/mass spectrometry to identify the types of organic contaminants to which workers may be exposed. Results indicate that the contaminants consisted primarily of one or two ring low-molecular weight aromatic compounds.
R, Tanita, D, Telesca, J, Walker, S, Berardinelli   +3 more
openaire   +2 more sources

Effect of Direct Coal Liquefaction Conditions on Coal Liquid Quality

Energy & Fuels, 2015
Solvent extraction of coal was investigated with a focus on the quality of the coal liquids rather than coal conversion.
Moshfiqur Rahman, Toluwanise Adesanwo, Rajender Gupta, Arno de Klerk   +3 more
openaire   +1 more source

Improvement of Coal Direct Liquefaction by Steam Pretreatment

Energy & Fuels, 1997
Pretreatment of coal by reaction with subcritical steam enhances its performance in direct liquefaction. Illinois No.
Olga Ivanenko, Robert A. Graff, Valeria Balogh-Nair, Claude Brathwaite   +3 more
openaire   +1 more source