The Experts below are selected from a list of 5700 Experts worldwide ranked by ideXlab platform

Zunhong Yu - One of the best experts on this subject based on the ideXlab platform.

  • pilot trial and modeling of a new type of pressurized entrained flow pulverized Coal Gasification Technology
    Fuel, 2008
    Co-Authors: Xin Gong, Fuchen Wang, Zunhong Yu
    Abstract:

    Abstract A new type of pressurized entrained-flow pulverized Coal Gasification Technology has been developed by ECUST. It is characterized with four nozzles symmetrically disposed on the upper part of a gasifier. The effects of operation conditions on Gasification, N 2 as carrier gas with middle pressure superheated (MP SH) steam, CO 2 as carrier gas with MP SH steam and CO 2 as carrier gas without MP SH steam, respectively, have been tested in the pilot plant. The carbon conversion of all Gasification schemes is larger than 99%. For N 2 as carrier gas, the volume fraction (Dry) of CO + H 2 is larger than 90% (v). For CO 2 as carrier gas, the volume fraction (Dry) of CO + H 2 is larger than 92% (v) with MP SH steam and larger than 95% (v) without MP SH steam. At the same time, based on Gibbs energy minimization principle, the pulverized Coal Gasification system model was built. The simulation results well matched the pilot-trial data under different operation conditions. The model can be used for the design, assessment, and improvement of the entrained-flow Coal Gasification system.

  • characterisation of residual carbon from entrained bed Coal water slurry gasifiers
    Fuel, 2007
    Co-Authors: Tao Wu, Fuchen Wang, Mei Gong, Edward Lester, Zhijie Zhou, Zunhong Yu
    Abstract:

    Abstract Gasification slag is a by-product of the Coal Gasification process. To achieve “zero emissions” from Coal Gasification Technology, the environmentally safe utilization of slag by-products from gasifiers must be addressed and developed. In this study, work has been carried out to characterize residual carbon in slag together the morphological study on vitreous material present in slag. The compositions of particles in Coal, char and slag were determined by using SEM/EDX. An elemental analyzer (Flash EA 1112) was adopted to analyze CHNS on bulk Coal, char and slag. The size distribution of carbon in slag was obtained by analyzing slag sample blocks using an image analysis program developed in this study. It was found that the coarse and fine slags both have a relatively high content of unburnt carbon which hinders their utilization as additives in cement and concrete. There was no evidence that coarse slag is the final destination for coarse char particles since large unburnt chars were found in both the coarse slag and the fine slag. The morphology of the residual carbon in the coarse slag is similar to that found in the fine slag, and is also comparable to partially combusted char produced in a drop tube furnace (DTF) operating at 1300 °C, 600 ms and 2% oxygen. It is also found that the vitreous particles in fine slag tends to be below 150 μm and the majority of residual carbon (75.6 wt%) in fine slag tends to be greater than 150 μm, which implies that, a simple screening operation might make the slag usable in concrete industries.

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

  • Progress on Opposed Multi-Burner (OMB) Coal-Water Slurry Gasification Technology and Its Industrial Applications
    Energy Procedia, 2017
    Co-Authors: Yan Gong, Guangsuo Yu, Xueli Chen, Yifei Wang, Fuchen Wang
    Abstract:

    Abstract Opposed multi-burner (OMB) Coal-water slurry (CWS) Gasification Technology is a large Coal Gasification Technology with self-owned intellectual property in China. With the dedicated support of Ministry of Science and Technology, National Development and Reform Commission (NDRC) and other relevant departments, East China University of Science and Technology (ECUST) and Yankuang Group had finished the pilot-scale research, the 1000 TPD industrial demonstration, the development of 2000 TPD OMB CWS Gasification Technology, and the industrial demonstration and operation of 3000 TPD ultra large scale OMB CWS Gasification Technology. OMB CWS Gasification Technology has been applied widely, having 52 projects and about 144 gasifiers. The total capacity of gasifier for all projects is about one hundred eighty thousand TPD, not including the spare gasifier. According to the industrial experience, OMB CWS Gasification is superior in many aspects, such as Gasification performance, process indexes, operational performance of the system, stability and reliability. OMB CWS Gasification Technology has great advantages especially in large-scale Gasification applications.

  • pilot trial and modeling of a new type of pressurized entrained flow pulverized Coal Gasification Technology
    Fuel, 2008
    Co-Authors: Xin Gong, Fuchen Wang, Zunhong Yu
    Abstract:

    Abstract A new type of pressurized entrained-flow pulverized Coal Gasification Technology has been developed by ECUST. It is characterized with four nozzles symmetrically disposed on the upper part of a gasifier. The effects of operation conditions on Gasification, N 2 as carrier gas with middle pressure superheated (MP SH) steam, CO 2 as carrier gas with MP SH steam and CO 2 as carrier gas without MP SH steam, respectively, have been tested in the pilot plant. The carbon conversion of all Gasification schemes is larger than 99%. For N 2 as carrier gas, the volume fraction (Dry) of CO + H 2 is larger than 90% (v). For CO 2 as carrier gas, the volume fraction (Dry) of CO + H 2 is larger than 92% (v) with MP SH steam and larger than 95% (v) without MP SH steam. At the same time, based on Gibbs energy minimization principle, the pulverized Coal Gasification system model was built. The simulation results well matched the pilot-trial data under different operation conditions. The model can be used for the design, assessment, and improvement of the entrained-flow Coal Gasification system.

  • characterisation of residual carbon from entrained bed Coal water slurry gasifiers
    Fuel, 2007
    Co-Authors: Tao Wu, Fuchen Wang, Mei Gong, Edward Lester, Zhijie Zhou, Zunhong Yu
    Abstract:

    Abstract Gasification slag is a by-product of the Coal Gasification process. To achieve “zero emissions” from Coal Gasification Technology, the environmentally safe utilization of slag by-products from gasifiers must be addressed and developed. In this study, work has been carried out to characterize residual carbon in slag together the morphological study on vitreous material present in slag. The compositions of particles in Coal, char and slag were determined by using SEM/EDX. An elemental analyzer (Flash EA 1112) was adopted to analyze CHNS on bulk Coal, char and slag. The size distribution of carbon in slag was obtained by analyzing slag sample blocks using an image analysis program developed in this study. It was found that the coarse and fine slags both have a relatively high content of unburnt carbon which hinders their utilization as additives in cement and concrete. There was no evidence that coarse slag is the final destination for coarse char particles since large unburnt chars were found in both the coarse slag and the fine slag. The morphology of the residual carbon in the coarse slag is similar to that found in the fine slag, and is also comparable to partially combusted char produced in a drop tube furnace (DTF) operating at 1300 °C, 600 ms and 2% oxygen. It is also found that the vitreous particles in fine slag tends to be below 150 μm and the majority of residual carbon (75.6 wt%) in fine slag tends to be greater than 150 μm, which implies that, a simple screening operation might make the slag usable in concrete industries.

Tao Wu - One of the best experts on this subject based on the ideXlab platform.

  • characterisation of residual carbon from entrained bed Coal water slurry gasifiers
    Fuel, 2007
    Co-Authors: Tao Wu, Fuchen Wang, Mei Gong, Edward Lester, Zhijie Zhou, Zunhong Yu
    Abstract:

    Abstract Gasification slag is a by-product of the Coal Gasification process. To achieve “zero emissions” from Coal Gasification Technology, the environmentally safe utilization of slag by-products from gasifiers must be addressed and developed. In this study, work has been carried out to characterize residual carbon in slag together the morphological study on vitreous material present in slag. The compositions of particles in Coal, char and slag were determined by using SEM/EDX. An elemental analyzer (Flash EA 1112) was adopted to analyze CHNS on bulk Coal, char and slag. The size distribution of carbon in slag was obtained by analyzing slag sample blocks using an image analysis program developed in this study. It was found that the coarse and fine slags both have a relatively high content of unburnt carbon which hinders their utilization as additives in cement and concrete. There was no evidence that coarse slag is the final destination for coarse char particles since large unburnt chars were found in both the coarse slag and the fine slag. The morphology of the residual carbon in the coarse slag is similar to that found in the fine slag, and is also comparable to partially combusted char produced in a drop tube furnace (DTF) operating at 1300 °C, 600 ms and 2% oxygen. It is also found that the vitreous particles in fine slag tends to be below 150 μm and the majority of residual carbon (75.6 wt%) in fine slag tends to be greater than 150 μm, which implies that, a simple screening operation might make the slag usable in concrete industries.

Mei Gong - One of the best experts on this subject based on the ideXlab platform.

  • characterisation of residual carbon from entrained bed Coal water slurry gasifiers
    Fuel, 2007
    Co-Authors: Tao Wu, Fuchen Wang, Mei Gong, Edward Lester, Zhijie Zhou, Zunhong Yu
    Abstract:

    Abstract Gasification slag is a by-product of the Coal Gasification process. To achieve “zero emissions” from Coal Gasification Technology, the environmentally safe utilization of slag by-products from gasifiers must be addressed and developed. In this study, work has been carried out to characterize residual carbon in slag together the morphological study on vitreous material present in slag. The compositions of particles in Coal, char and slag were determined by using SEM/EDX. An elemental analyzer (Flash EA 1112) was adopted to analyze CHNS on bulk Coal, char and slag. The size distribution of carbon in slag was obtained by analyzing slag sample blocks using an image analysis program developed in this study. It was found that the coarse and fine slags both have a relatively high content of unburnt carbon which hinders their utilization as additives in cement and concrete. There was no evidence that coarse slag is the final destination for coarse char particles since large unburnt chars were found in both the coarse slag and the fine slag. The morphology of the residual carbon in the coarse slag is similar to that found in the fine slag, and is also comparable to partially combusted char produced in a drop tube furnace (DTF) operating at 1300 °C, 600 ms and 2% oxygen. It is also found that the vitreous particles in fine slag tends to be below 150 μm and the majority of residual carbon (75.6 wt%) in fine slag tends to be greater than 150 μm, which implies that, a simple screening operation might make the slag usable in concrete industries.

Edward Lester - One of the best experts on this subject based on the ideXlab platform.

  • characterisation of residual carbon from entrained bed Coal water slurry gasifiers
    Fuel, 2007
    Co-Authors: Tao Wu, Fuchen Wang, Mei Gong, Edward Lester, Zhijie Zhou, Zunhong Yu
    Abstract:

    Abstract Gasification slag is a by-product of the Coal Gasification process. To achieve “zero emissions” from Coal Gasification Technology, the environmentally safe utilization of slag by-products from gasifiers must be addressed and developed. In this study, work has been carried out to characterize residual carbon in slag together the morphological study on vitreous material present in slag. The compositions of particles in Coal, char and slag were determined by using SEM/EDX. An elemental analyzer (Flash EA 1112) was adopted to analyze CHNS on bulk Coal, char and slag. The size distribution of carbon in slag was obtained by analyzing slag sample blocks using an image analysis program developed in this study. It was found that the coarse and fine slags both have a relatively high content of unburnt carbon which hinders their utilization as additives in cement and concrete. There was no evidence that coarse slag is the final destination for coarse char particles since large unburnt chars were found in both the coarse slag and the fine slag. The morphology of the residual carbon in the coarse slag is similar to that found in the fine slag, and is also comparable to partially combusted char produced in a drop tube furnace (DTF) operating at 1300 °C, 600 ms and 2% oxygen. It is also found that the vitreous particles in fine slag tends to be below 150 μm and the majority of residual carbon (75.6 wt%) in fine slag tends to be greater than 150 μm, which implies that, a simple screening operation might make the slag usable in concrete industries.