The Experts below are selected from a list of 27159 Experts worldwide ranked by ideXlab platform
Chao Qian - One of the best experts on this subject based on the ideXlab platform.
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Influence of dispersants on coal-water slurry prepared from the Solid Residue of plasma pyrolysis of coal
Chinese Journal of Chemical Engineering, 2020Co-Authors: Chao Qian, Liang Zhao, Xinzhi ChenAbstract:Abstract This work presents the influence of dispersants on coal-water slurry (CWS), which was prepared from the Solid Residue of plasma pyrolysis of coal. The effects of dispersant type, Solid concentration, dispersant content, and temperature on the rheological properties of CWS are examined. A suitable empirical model regarding the relation between viscosity and temperature is proposed. Through the sedimentation experiment of CWS, dispersants are found to significantly promote the stability of CWS.
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an investigation on characteristics of coal water slurry prepared from the Solid Residue of plasma pyrolysis of coal
Energy Conversion and Management, 2012Co-Authors: Xinzhi Chen, Liang Zhao, Xu Zhang, Chao QianAbstract:Abstract As massive amount of Solid Residue is produced from plasma pyrolysis of coal, reasonable use of such Residue is significant in protecting environment and improving economic performance. This work is focusing on the fundamental research of the characteristics of coal–water slurry (CWS) prepared from the Solid Residue of plasma pyrolysis of coal. The effect of particle size, Solid concentration, pH and temperature on the rheological properties of CWS is investigated. Shear-thinning behavior of suspension has been observed depending on component content and operating conditions. Static stability is also investigated by sedimentation test. A more suitable cubic model for expressing the relation between viscosity and temperature is proposed.
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An investigation on characteristics of coal–water slurry prepared from the Solid Residue of plasma pyrolysis of coal
Energy Conversion and Management, 2012Co-Authors: Xinzhi Chen, Liang Zhao, Xu Zhang, Chao QianAbstract:Abstract As massive amount of Solid Residue is produced from plasma pyrolysis of coal, reasonable use of such Residue is significant in protecting environment and improving economic performance. This work is focusing on the fundamental research of the characteristics of coal–water slurry (CWS) prepared from the Solid Residue of plasma pyrolysis of coal. The effect of particle size, Solid concentration, pH and temperature on the rheological properties of CWS is investigated. Shear-thinning behavior of suspension has been observed depending on component content and operating conditions. Static stability is also investigated by sedimentation test. A more suitable cubic model for expressing the relation between viscosity and temperature is proposed.
Xinzhi Chen - One of the best experts on this subject based on the ideXlab platform.
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Influence of dispersants on coal-water slurry prepared from the Solid Residue of plasma pyrolysis of coal
Chinese Journal of Chemical Engineering, 2020Co-Authors: Chao Qian, Liang Zhao, Xinzhi ChenAbstract:Abstract This work presents the influence of dispersants on coal-water slurry (CWS), which was prepared from the Solid Residue of plasma pyrolysis of coal. The effects of dispersant type, Solid concentration, dispersant content, and temperature on the rheological properties of CWS are examined. A suitable empirical model regarding the relation between viscosity and temperature is proposed. Through the sedimentation experiment of CWS, dispersants are found to significantly promote the stability of CWS.
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an investigation on characteristics of coal water slurry prepared from the Solid Residue of plasma pyrolysis of coal
Energy Conversion and Management, 2012Co-Authors: Xinzhi Chen, Liang Zhao, Xu Zhang, Chao QianAbstract:Abstract As massive amount of Solid Residue is produced from plasma pyrolysis of coal, reasonable use of such Residue is significant in protecting environment and improving economic performance. This work is focusing on the fundamental research of the characteristics of coal–water slurry (CWS) prepared from the Solid Residue of plasma pyrolysis of coal. The effect of particle size, Solid concentration, pH and temperature on the rheological properties of CWS is investigated. Shear-thinning behavior of suspension has been observed depending on component content and operating conditions. Static stability is also investigated by sedimentation test. A more suitable cubic model for expressing the relation between viscosity and temperature is proposed.
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An investigation on characteristics of coal–water slurry prepared from the Solid Residue of plasma pyrolysis of coal
Energy Conversion and Management, 2012Co-Authors: Xinzhi Chen, Liang Zhao, Xu Zhang, Chao QianAbstract:Abstract As massive amount of Solid Residue is produced from plasma pyrolysis of coal, reasonable use of such Residue is significant in protecting environment and improving economic performance. This work is focusing on the fundamental research of the characteristics of coal–water slurry (CWS) prepared from the Solid Residue of plasma pyrolysis of coal. The effect of particle size, Solid concentration, pH and temperature on the rheological properties of CWS is investigated. Shear-thinning behavior of suspension has been observed depending on component content and operating conditions. Static stability is also investigated by sedimentation test. A more suitable cubic model for expressing the relation between viscosity and temperature is proposed.
Miao Gong - One of the best experts on this subject based on the ideXlab platform.
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Quantitative analysis of polycyclic aromatic hydrocarbons in Solid Residues from supercritical water gasification of wet sewage sludge
Applied Energy, 2013Co-Authors: Wei Zhu, Huiwen Zhang, Miao GongAbstract:Hydrogen gas has been successfully produced from sewage sludge by supercritical water gasification. Therefore, whether toxic compounds are synthesized in the supercritical water gasification of sewage sludge should be clarified because of the complex pollutants in sludge. In the current study, the content and forms of polycyclic aromatic hydrocarbons (PAHs) in the Solid Residue from the supercritical water gasification of wet sludge was investigated using a high-pressure autoclave. The process parameters, such as reaction temperature (400–455°C), reaction time (0–60min), dry matter content (5.6–23.8wt%) in the feedstock, and heating period, were varied to investigate their effects on the PAH content and forms. The results showed that PAHs are generated during supercritical water gasification and that high reaction temperature, long reaction time, and low dry matter content favor the formation of PAHs in the Solid Residue, mainly involving 4-ring PAHs. Moreover, the amount of total PAHs in the Solid Residue did not exceed the allowable limits of soil quality assessment for exhibition (B class) in China and meets the Canadian soil quality for commercial land use. In addition, the mechanism of PAH formation during supercritical water gasification was discussed in this paper.
Hua-min Liu - One of the best experts on this subject based on the ideXlab platform.
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Cornstalk liquefaction in sub- and super-critical ethanol: Characterization of Solid Residue and the liquefaction mechanism
Journal of the Energy Institute, 2017Co-Authors: Hua-min LiuAbstract:Abstract Cornstalk liquefaction in sub- and super-critical ethanol was carried out in an autoclave at various temperatures. The characteristics of Solid Residue were investigated by XRD and sugar analysis. Milled Solid Residue fraction was isolated from the Solid Residue, and its chemical characteristics were comparatively investigated with milled wood lignin of cornstalk by gel permeation chromatography, FT-IR, and 2D HSQC NMR. The results showed that the structure of xylan in cornstalk was not broken down completely under the reaction temperatures and those liquefaction conditions were unable to break effectively apart the inter/intra chain hydrogen bonding in cellulose fibrils. Characterization of milled Solid Residue showed that the de-polymerization of lignin was more dominant than the re-polymerization as reaction temperature increased from 180 to 300 °C. The β-O-4, ferulate, tricin substructures almost disappeared from the spectrum of milled Solid Residue, which indicated the re-polymerization or decomposition of those bonds in lignin during cornstalk liquefaction process. The result showed that characterization of Solid Residue fractions provided some new information of the mechanisms about cornstalk liquefaction in ethanol.
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New materials from Solid Residues for investigation the mechanism of biomass hydrothermal liquefaction
Industrial Crops and Products, 2017Co-Authors: Hua-min Liu, Xin’an XieAbstract:Abstract Advanced analysis technologies cannot be applicable to structural characterization of Solid Residue from biomass hydrothermal liquefaction due to its insoluble characteristics in organic solution. In this investigation, the milled Solid Residue fractions were isolated from the Solid Residues producing during cypress hydrothermal liquefaction at 220, 260, and 300 °C. Their fractions structural characteristics were comparatively investigated by advanced analysis technologies such as liquid state Nuclear Magnetic Resonance. Dichloroethane/ethanol insoluble fractions were firstly found during the liquefaction process at 260–300 °C and results showed that the fractions were the intermediate component of biomass carbonization and mainly produced from the re-polymerization reactions of lignin during hydrothermal liquefaction process. The presence of crosslinking reactions between carbon-carbon which lead to the formation of a highly crosslinked structure resulting in the formation of milled Solid Residue fractions, which made the fractions be not insoluble in dichloroethane/ethanol and have high thermal stable and molecular weight. Ether structures scission, de-methylation reactions, re-polymerization between carbon-carbon, and fragmentation of large molecular fractions have been occurred in lignin during hydrothermal liquefaction process. The result showed that characterization of milled Solid Residue fractions provided some new information of the mechanisms of biomass hydrothermal liquefaction.
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Characterization of milled Solid Residue from cypress liquefaction in sub- and super ethanol.
Bioresource technology, 2013Co-Authors: Hua-min Liu, Yu-lan LiuAbstract:Cypress liquefaction in sub- and super ethanol was carried out in an autoclave at various temperatures. Milled Solid Residue (MSR) was isolated from Solid Residue remaining from the liquefaction process, and its chemical characteristics was comparatively investigated with milled wood lignin (MWL) of cypress by sugar analysis, elemental analysis, FT-IR analysis, gel permeation chromatography, and NMR analysis. Results showed that there were two reactions (de-polymerization and re-polymerization) during the cypress liquefaction in sub- and super ethanol and the re-polymerization reactions were the main reaction at 220-260°C. Considering the stability of side-chain, the stability of lignin side-chain in cypress during liquefaction process in ethanol could be sequenced as follows: β-5>β-β'>β-O-4'. The MSR were mainly from the decomposition and re-polymerization of lignin. This study suggests that characterization of MSR provides a promising method to investigate the mechanisms of cypress liquefaction in ethanol.
J J Pis - One of the best experts on this subject based on the ideXlab platform.
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microwave induced drying pyrolysis and gasification mwdpg of sewage sludge vitrification of the Solid Residue
Journal of Analytical and Applied Pyrolysis, 2005Co-Authors: J A Menendez, A Dominguez, M Inguanzo, J J PisAbstract:A novel method for sewage sludge treatment based on subjecting the wet sludge to high temperature thermal treatment in a microwave is being investigated at INCAR. Under the appropriate operating conditions, drying, pyrolysis and gasification of the sewage sludge take place, giving rise to a gas with a high CO and H2 content and an oil with a low PAH content. Moreover, due to the high temperatures that can be attained during the process it is possible to obtain a Solid Residue which is partially vitrified. Unlike other methods aimed at maximizing the porous texture of the Solid Residue in order to produce adsorbents, the aim of the method proposed in this work is to obtain a Solid Residue with minimal porous textural development, where the heavy metals present in the Residue are occluded in a glassy-like matrix. The advantages of this technique are a substantial volume reduction with respect to the initial sludge and a Solid Residue that is more resistant to the leaching of organic substances and heavy metals than the char obtained by conventional pyrolysis.
