The Experts below are selected from a list of 42 Experts worldwide ranked by ideXlab platform

Chatphol Meesri - One of the best experts on this subject based on the ideXlab platform.

  • pyrolysis and combustion characteristics of an indonesian low rank coal under o2 n2 and o2 co2 conditions
    Energy & Fuels, 2010
    Co-Authors: Xianchun Li, Renu Kumar Rathnam, T F Wall, Jianglong Yu, Qi Wang, Chatphol Meesri
    Abstract:

    Pyrolysis and combustion characteristics of an Indonesian low-rank coal are studied under oxy-fuel (O2/CO2) and air (O2/N2) conditions using a drop tube furnace (DTF) and a thermogravimetric analyzer (TGA). Raw coal, dried coal, and Binderless briquette samples of the same coal were used in the experiments, and the effects of drying and Binderless Briquetting on the reactivity of the coal under different conditions were investigated. Chars were prepared in the DTF in both N2 and CO2 atmospheres in the temperature range of 800−1400 °C. The reactivity of chars under oxy-fuel and air conditions was analyzed in the TGA. The coal reactivity under oxy-fuel conditions differed from that under air combustion conditions. The temperature at which significant gasification of the coal and char took place in the concentrated CO2 gas stream was also identified. Characteristics of chars from different conditions were compared. Drying and Briquetting had some noticeable influences on the reactivity of the coal under oxy-...

S J Mangena - One of the best experts on this subject based on the ideXlab platform.

  • Binderless Briquetting of some selected south african prime coking blend coking and weathered bituminous coals and the effect of coal properties on Binderless Briquetting
    International Journal of Coal Geology, 2007
    Co-Authors: S J Mangena, V M Du Cann
    Abstract:

    Abstract The Binderless Briquetting of some selected South African prime coking and blend coking coals, as well as the effects of weathering on the Binderless Briquetting of some inertinite-rich bituminous coals, were investigated in the laboratory. Selected properties of these coals were determined and the coals were briquetted at various moisture contents and pressures. Based on the results obtained in this study, Binderless Briquetting was found to be most successful in the cases of the fresh, vitrinite-rich coking and blend coking coals and satisfactory in the fresh inertinite-rich Witbank coals. However, the bonding process seemed to be adversely affected by weathering. The negative impact on bonding could be ameliorated to some extent by the presence of a significant kaolinite content when the percentage ash reports in the order of more than 15% (air-dry basis). It should, however, be noted that kaolinite may reduce the water resistance of the briquettes.

  • the amenability of some witbank bituminous ultra fine coals to Binderless Briquetting
    Fuel Processing Technology, 2004
    Co-Authors: S J Mangena, G J De Korte, Robert I Mccrindle, D L Morgan
    Abstract:

    Five ultra fine bituminous coals from the Witbank coalfield were studied. Selected chemical and physical properties, coal petrographic characteristics and mineralogical compositions of the coals were measured. The coals were compacted, using a Briquetting press, at various feed moisture contents. The formed briquettes were then tested for compressive strength and water resistance and the values correlated with the coal characteristics and the Briquetting conditions. The coals were found to be amenable to conventional Binderless Briquetting. The bonding in the briquettes was found to be due mainly due to the impurities in the coals, particularly kaolinite. This may add a new perspective to the fundamentals of the Binderless Briquetting of bituminous coals.

Xianchun Li - One of the best experts on this subject based on the ideXlab platform.

  • pyrolysis and combustion characteristics of an indonesian low rank coal under o2 n2 and o2 co2 conditions
    Energy & Fuels, 2010
    Co-Authors: Xianchun Li, Renu Kumar Rathnam, T F Wall, Jianglong Yu, Qi Wang, Chatphol Meesri
    Abstract:

    Pyrolysis and combustion characteristics of an Indonesian low-rank coal are studied under oxy-fuel (O2/CO2) and air (O2/N2) conditions using a drop tube furnace (DTF) and a thermogravimetric analyzer (TGA). Raw coal, dried coal, and Binderless briquette samples of the same coal were used in the experiments, and the effects of drying and Binderless Briquetting on the reactivity of the coal under different conditions were investigated. Chars were prepared in the DTF in both N2 and CO2 atmospheres in the temperature range of 800−1400 °C. The reactivity of chars under oxy-fuel and air conditions was analyzed in the TGA. The coal reactivity under oxy-fuel conditions differed from that under air combustion conditions. The temperature at which significant gasification of the coal and char took place in the concentrated CO2 gas stream was also identified. Characteristics of chars from different conditions were compared. Drying and Briquetting had some noticeable influences on the reactivity of the coal under oxy-...

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

  • pyrolysis and combustion characteristics of an indonesian low rank coal under o2 n2 and o2 co2 conditions
    Energy & Fuels, 2010
    Co-Authors: Xianchun Li, Renu Kumar Rathnam, T F Wall, Jianglong Yu, Qi Wang, Chatphol Meesri
    Abstract:

    Pyrolysis and combustion characteristics of an Indonesian low-rank coal are studied under oxy-fuel (O2/CO2) and air (O2/N2) conditions using a drop tube furnace (DTF) and a thermogravimetric analyzer (TGA). Raw coal, dried coal, and Binderless briquette samples of the same coal were used in the experiments, and the effects of drying and Binderless Briquetting on the reactivity of the coal under different conditions were investigated. Chars were prepared in the DTF in both N2 and CO2 atmospheres in the temperature range of 800−1400 °C. The reactivity of chars under oxy-fuel and air conditions was analyzed in the TGA. The coal reactivity under oxy-fuel conditions differed from that under air combustion conditions. The temperature at which significant gasification of the coal and char took place in the concentrated CO2 gas stream was also identified. Characteristics of chars from different conditions were compared. Drying and Briquetting had some noticeable influences on the reactivity of the coal under oxy-...

  • Pyrolysis and combustion characteristics of an indonesian low-rank coal under O₂/N₂and O₂/CO₂ conditions
    American Chemical Society, 2010
    Co-Authors: Li Xianchun, Qi Wang, Yu Jianglong, Rathnam, Renu K., Wall Terry, Meesri Chatphol
    Abstract:

    Pyrolysis and combustion characteristics of an Indonesian low-rank coal are studied under oxy-fuel (O₂/CO₂) and air (O₂/N₂) conditions using a drop tube furnace (DTF) and a thermogravimetric analyzer (TGA). Raw coal, dried coal, and Binderless briquette samples of the same coal were used in the experiments, and the effects of drying and Binderless Briquetting on the reactivity of the coal under different conditions were investigated. Chars were prepared in the DTF in both N₂ and CO₂ atmospheres in the temperature range of 800−1400 °C. The reactivity of chars under oxy-fuel and air conditions was analyzed in the TGA. The coal reactivity under oxy-fuel conditions differed from that under air combustion conditions. The temperature at which significant gasification of the coal and char took place in the concentrated CO₂ gas stream was also identified. Characteristics of chars from different conditions were compared. Drying and Briquetting had some noticeable influences on the reactivity of the coal under oxy-fuel conditions

Yanna Han - One of the best experts on this subject based on the ideXlab platform.

  • An experimental study on Binderless Briquetting of Chinese lignite: Effects of Briquetting conditions
    Fuel Processing Technology, 2014
    Co-Authors: Baolin Sun, Arash Tahmasebi, Yanna Han
    Abstract:

    Abstract Technology development of lignite upgrading involving drying and Binderless Briquetting is important to the efficient utilization of lignite resources. In this study, the effects of Briquetting conditions, i.e., Briquetting pressure, temperature, coal properties and pretreatment, on the compressive strength of briquettes were systemically investigated using a lab-scale Briquetting testing rig. The experimental results indicated that the compressive strength of briquettes increased with increasing the compression pressure. An optimum strength was obtained at the Briquetting temperature of 150 °C. There also existed an optimum moisture content of 14–16% at which the highest compressive briquette strength was achieved. The increase in the amount of –125 μm size fraction in the feed sample increased the briquette strength. FTIR analysis showed that the oxygen-containing functional groups have a significant influence on the compressive briquette strength due to the ability of forming more hydrogen bonds.