The Experts below are selected from a list of 4077 Experts worldwide ranked by ideXlab platform

Yuan Liu - One of the best experts on this subject based on the ideXlab platform.

  • co combustion of industrial Coal Slurry and sewage sludge thermochemical and emission behavior of heavy metals
    Chemosphere, 2019
    Co-Authors: Guijian Liu, Manik Mian, Chuncai Zhou, Mei Sun, Yuan Liu
    Abstract:

    A combination of thermogravimetric analysis and lab-scale fixed bed combustion experiments was carried out to study the thermochemical, kinetic and heavy metals emission behavior during co-combustion of industrial Coal Slurry (CS) and sewage sludge (SS). The results found that the blends had integrative combustion profiles which reflected both Coal Slurry and sewage sludge. During co-combustion, the ignition performance of CS could be significantly improved with the addition of SS. Synergetic effects of the co-combustion were observed at lower temperature, while the high-temperature char combustion of the blends was inhibited because of high ash components of SS or formation of inactive alkali metal aluminosilicates. Kinetic analysis confirmed the improve iginition behavior of blends. Both the comprehensive combustibility index S and the activation energy suggested that the blends with 20% SS may have the best promoting effects. Compared with CS, the higher concentration of Cl in SS increased the volatilization ratios of Cu, Zn, As, and Pb. When added CS into SS, the volatilization ratios of arsenic decreased during combustion. The inhibition effects for arsenic during co-combustion might be associated with the capture of arsenic vapors by the new-formed Ca/Al from CS thermal decomposition.

Zhenghui Zhao - One of the best experts on this subject based on the ideXlab platform.

  • preparing Coal Slurry from coking wastewater to achieve resource utilization Slurrying mechanism of coking wastewater Coal Slurry
    Science of The Total Environment, 2019
    Co-Authors: Ruikun Wang, Xuemin Ye, Chunxi Li, Zhenghui Zhao
    Abstract:

    Abstract Coking wastewater is used to prepare Coal Slurry, which can be used as combustion and gasification fuel. This promising technology simultaneously achieves resource utilization and wastewater management. Slurrying properties are essential to the industrial application of Coal Slurry. These properties are considerably influenced by Coal surface properties and the adsorption of an additive by Coal. In this study, the effects of the internal components (e.g., phenol, ammonia nitrogen, and metal ions) of coking wastewater on the adsorption of an additive by Coal and on Coal surface properties were measured. Results showed that the competitive adsorption between phenol and the additive reduced the amount of additive adsorbed on Coal. However, phenol acted as an additive to improve the wettability of Coal particles. Cations (Ca2+, NH4+, and Na+) adversely affected the Slurrying because they weakened the negative charges of Coal. Furthermore, a large amount of water was adsorbed due to the ionic bonding effects, thereby reducing the free water in the Coal Slurry system. The maximum Slurrying concentration of CWCS was 0.8 percentage points higher than that of CWS, suggesting that coking wastewater enhanced the Slurrying capability of the Coal Slurry by integrating the various effects induced by the different internal components.

  • Preparing Coal Slurry from coking wastewater to achieve resource utilization: Slurrying mechanism of coking wastewater–Coal Slurry
    Science of The Total Environment, 2018
    Co-Authors: Ruikun Wang, Xuemin Ye, Chunxi Li, Qianqian Ma, Zhenghui Zhao
    Abstract:

    Abstract Coking wastewater is used to prepare Coal Slurry, which can be used as combustion and gasification fuel. This promising technology simultaneously achieves resource utilization and wastewater management. Slurrying properties are essential to the industrial application of Coal Slurry. These properties are considerably influenced by Coal surface properties and the adsorption of an additive by Coal. In this study, the effects of the internal components (e.g., phenol, ammonia nitrogen, and metal ions) of coking wastewater on the adsorption of an additive by Coal and on Coal surface properties were measured. Results showed that the competitive adsorption between phenol and the additive reduced the amount of additive adsorbed on Coal. However, phenol acted as an additive to improve the wettability of Coal particles. Cations (Ca2+, NH4+, and Na+) adversely affected the Slurrying because they weakened the negative charges of Coal. Furthermore, a large amount of water was adsorbed due to the ionic bonding effects, thereby reducing the free water in the Coal Slurry system. The maximum Slurrying concentration of CWCS was 0.8 percentage points higher than that of CWS, suggesting that coking wastewater enhanced the Slurrying capability of the Coal Slurry by integrating the various effects induced by the different internal components.

Guijian Liu - One of the best experts on this subject based on the ideXlab platform.

  • co combustion of industrial Coal Slurry and sewage sludge thermochemical and emission behavior of heavy metals
    Chemosphere, 2019
    Co-Authors: Guijian Liu, Manik Mian, Chuncai Zhou, Mei Sun, Yuan Liu
    Abstract:

    A combination of thermogravimetric analysis and lab-scale fixed bed combustion experiments was carried out to study the thermochemical, kinetic and heavy metals emission behavior during co-combustion of industrial Coal Slurry (CS) and sewage sludge (SS). The results found that the blends had integrative combustion profiles which reflected both Coal Slurry and sewage sludge. During co-combustion, the ignition performance of CS could be significantly improved with the addition of SS. Synergetic effects of the co-combustion were observed at lower temperature, while the high-temperature char combustion of the blends was inhibited because of high ash components of SS or formation of inactive alkali metal aluminosilicates. Kinetic analysis confirmed the improve iginition behavior of blends. Both the comprehensive combustibility index S and the activation energy suggested that the blends with 20% SS may have the best promoting effects. Compared with CS, the higher concentration of Cl in SS increased the volatilization ratios of Cu, Zn, As, and Pb. When added CS into SS, the volatilization ratios of arsenic decreased during combustion. The inhibition effects for arsenic during co-combustion might be associated with the capture of arsenic vapors by the new-formed Ca/Al from CS thermal decomposition.

Ruikun Wang - One of the best experts on this subject based on the ideXlab platform.

  • preparing Coal Slurry from coking wastewater to achieve resource utilization Slurrying mechanism of coking wastewater Coal Slurry
    Science of The Total Environment, 2019
    Co-Authors: Ruikun Wang, Xuemin Ye, Chunxi Li, Zhenghui Zhao
    Abstract:

    Abstract Coking wastewater is used to prepare Coal Slurry, which can be used as combustion and gasification fuel. This promising technology simultaneously achieves resource utilization and wastewater management. Slurrying properties are essential to the industrial application of Coal Slurry. These properties are considerably influenced by Coal surface properties and the adsorption of an additive by Coal. In this study, the effects of the internal components (e.g., phenol, ammonia nitrogen, and metal ions) of coking wastewater on the adsorption of an additive by Coal and on Coal surface properties were measured. Results showed that the competitive adsorption between phenol and the additive reduced the amount of additive adsorbed on Coal. However, phenol acted as an additive to improve the wettability of Coal particles. Cations (Ca2+, NH4+, and Na+) adversely affected the Slurrying because they weakened the negative charges of Coal. Furthermore, a large amount of water was adsorbed due to the ionic bonding effects, thereby reducing the free water in the Coal Slurry system. The maximum Slurrying concentration of CWCS was 0.8 percentage points higher than that of CWS, suggesting that coking wastewater enhanced the Slurrying capability of the Coal Slurry by integrating the various effects induced by the different internal components.

  • Preparing Coal Slurry from coking wastewater to achieve resource utilization: Slurrying mechanism of coking wastewater–Coal Slurry
    Science of The Total Environment, 2018
    Co-Authors: Ruikun Wang, Xuemin Ye, Chunxi Li, Qianqian Ma, Zhenghui Zhao
    Abstract:

    Abstract Coking wastewater is used to prepare Coal Slurry, which can be used as combustion and gasification fuel. This promising technology simultaneously achieves resource utilization and wastewater management. Slurrying properties are essential to the industrial application of Coal Slurry. These properties are considerably influenced by Coal surface properties and the adsorption of an additive by Coal. In this study, the effects of the internal components (e.g., phenol, ammonia nitrogen, and metal ions) of coking wastewater on the adsorption of an additive by Coal and on Coal surface properties were measured. Results showed that the competitive adsorption between phenol and the additive reduced the amount of additive adsorbed on Coal. However, phenol acted as an additive to improve the wettability of Coal particles. Cations (Ca2+, NH4+, and Na+) adversely affected the Slurrying because they weakened the negative charges of Coal. Furthermore, a large amount of water was adsorbed due to the ionic bonding effects, thereby reducing the free water in the Coal Slurry system. The maximum Slurrying concentration of CWCS was 0.8 percentage points higher than that of CWS, suggesting that coking wastewater enhanced the Slurrying capability of the Coal Slurry by integrating the various effects induced by the different internal components.

  • Study on the Slurrying and rheological properties of Coal–oilfield wastewater–Slurry
    Energy Sources Part A-recovery Utilization and Environmental Effects, 2016
    Co-Authors: Yi Xiang, Ruikun Wang, Junhong Wu, Junhu Zhou
    Abstract:

    ABSTRACTIn this study, oilfield wastewater (OWW) was used to prepare Coal–oilfield wastewater–Slurry (COWS), and the apparent viscosity, solid concentration, and rheological curve were studied. Compared with original Coal–water–Slurry (CWS), the maximum solid concentration of COWS increased, and the viscosity decreased; therefore, the Slurrying ability of the Coal Slurry was improved with the use of OWW. However, although the oil in OWW promoted the Slurrying ability of the Coal Slurry, its effectiveness was insufficient, and a chemical additive was still needed to obtain a Coal Slurry with enhanced Slurrying ability. Both COWS and CWS exhibited shear-thinning behavior, and the rheological index value of COWS was lower, which indicated that pseudoplasticity of COWS was more obvious, and OWW improved the rheological properties of Coal Slurry.

Chuncai Zhou - One of the best experts on this subject based on the ideXlab platform.

  • co combustion of industrial Coal Slurry and sewage sludge thermochemical and emission behavior of heavy metals
    Chemosphere, 2019
    Co-Authors: Guijian Liu, Manik Mian, Chuncai Zhou, Mei Sun, Yuan Liu
    Abstract:

    A combination of thermogravimetric analysis and lab-scale fixed bed combustion experiments was carried out to study the thermochemical, kinetic and heavy metals emission behavior during co-combustion of industrial Coal Slurry (CS) and sewage sludge (SS). The results found that the blends had integrative combustion profiles which reflected both Coal Slurry and sewage sludge. During co-combustion, the ignition performance of CS could be significantly improved with the addition of SS. Synergetic effects of the co-combustion were observed at lower temperature, while the high-temperature char combustion of the blends was inhibited because of high ash components of SS or formation of inactive alkali metal aluminosilicates. Kinetic analysis confirmed the improve iginition behavior of blends. Both the comprehensive combustibility index S and the activation energy suggested that the blends with 20% SS may have the best promoting effects. Compared with CS, the higher concentration of Cl in SS increased the volatilization ratios of Cu, Zn, As, and Pb. When added CS into SS, the volatilization ratios of arsenic decreased during combustion. The inhibition effects for arsenic during co-combustion might be associated with the capture of arsenic vapors by the new-formed Ca/Al from CS thermal decomposition.