The Experts below are selected from a list of 5409 Experts worldwide ranked by ideXlab platform

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

  • clean synthesis gas production from municipal solid waste via Catalytic Gasification and reforming technology
    Catalysis Today, 2018
    Co-Authors: Lu Zhang, Wei Wu, Yongjie Zhang, Xianchao Zhou
    Abstract:

    Abstract In this paper, the municipal solid waste was used as raw material to produce clean synthesis gas via Catalytic Gasification and reforming technology and gas purification unit. Nickel based catalysts with different Ce content were prepared by impregnation, then the effects of operating parameters including the oxygen addition, steam addition and Ni-based catalysts’ component on synthesis gas generation characteristics were studied. The results indicated that the increasing of oxygen injection and steam supply can improve the carbon conversion efficiency and cold gas efficiency. The addition of metal additives in Ni-based catalyst can promote the decomposition of tar and increase synthesis gas yield. At the temperature of 850 °C, equivalence ratio = 0.06, steam/carbon ratio = 3.6, the clean synthesis gas was produced with hydrogen concentration of 36.78 vol.% and carbon monoxide concentration of 15.29 vol.% via Catalytic Gasification and reforming process. The cold gas efficiency and carbon conversion rate were 70.17% and 87.17%, respectively. The yield of syngas was up to 0.679 m3/kg and the tar content was reduced to 17.76 g/Nm3. After the purification of the gas purification unit, the phenolic compounds were completely removed. The content of SO2 and NOX gas can meet the emission standard of air pollutants, and the average removal efficiency of heavy metal Cr, Pb, Zn, Cu and Hg was above 50%.

Takayuki Takarada - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis gas production from Catalytic Gasification of waste biomass using nickel-loaded brown coal char
    Fuel, 2011
    Co-Authors: Xianbin Xiao, Liuyun Li, Xianliang Meng, Yukiko Ogawa, Kazuyoshi Sato, Duc Dung Le, Jingpei Cao, Takayuki Takarada
    Abstract:

    This paper presents an experimental research concerning the Catalytic Gasification of waste biomass to synthesis gas using Ni-loaded brown coal char (Ni/BCC). The attention is focused on the Catalytic conditions for enhancing the synthesis gas production, improving its composition and extending the catalyst lifetime. The aim is achieved by means of the characterization of Ni/BCC and the product gas analysis, through Gasification experiments of a woody biomass and an animal-waste-derived biomass both in a fixed bed reactor and a fluidized bed reactor at various Catalytic temperatures and steam/biomass–carbon (S/C) ratios. Effects of the pyrolysis temperature and the steam treatment on the nickel crystallite size are analyzed and used as the reference of choosing optimum Gasification conditions. With brown coal char as support material, Ni/BCC is found as an excellent catalyst even at low temperature of about 650 °C and shows a good resistance ability of coke formation, compared to non-catalyst and Ni/Al2O3. More than 25 h continuous operation is also performed in a 1 kg/h Internally Circulating Fluidized-bed Gasifier (ICFG) to assess the lifetime of Ni/BCC. Smaller S/C ratio at the appropriate temperature is suggested to lower the coal char Gasification, thereby reducing the degradation of the support material.

  • H2 production from fowl manure by low temperature Catalytic Gasification.
    Bioresource Technology, 2011
    Co-Authors: Shouyu Zhang, Jingpei Cao, Jian Wang, Takayuki Takarada
    Abstract:

    Abstract In the paper, H 2 rich gas produced from fowl manure (hen compost-HC) by low temperature Catalytic Gasification (LTCG) technology is addressed. The pyrolysis behaviors of the samples before and after weak acid pretreatment were investigated using thermal gravimetric analysis. Furthermore, the Catalytic influence of HC char and HC ash on the decomposition of the nascent volatiles was determined. A Catalytic role of the minerals contained in HC on its pyrolysis behavior was confirmed due to the high content of Ca. LTCG process promotes the complete decomposition of the manure volatiles and significantly increases H 2 yield and the total gas yield. An obvious Catalytic effect of HC char and HC ash on the decomposition of the nascent volatiles is attributed to CaO contained in them.

  • Low temperature Catalytic Gasification of pig compost to produce H2 rich gas
    Bioresource Technology, 2011
    Co-Authors: Shouyu Zhang, Jingpei Cao, Xiu-jun Wang, Takayuki Takarada
    Abstract:

    The low temperature Catalytic Gasification of pig compost before and after acid washing was carried out to produce H2 rich gas using a two-stage fixed-bed reactor. Little effect of the minerals on the manure pyrolysis is determined. Under the presence of Ni/Al2O3 catalyst nearly all the tarry matters were cracked into H2, CO, CO2 and residual carbon. High H2 and CO yields were obtained by low temperature Catalytic steam Gasification. Acid washing results in the decrease in the content of the ease-hydrolyzed organic components, which volatilize at low temperature. The change in the gas yields from the manure during Catalytic decomposition is in accordance with its pyrolysis behavior.

Lu Zhang - One of the best experts on this subject based on the ideXlab platform.

  • clean synthesis gas production from municipal solid waste via Catalytic Gasification and reforming technology
    Catalysis Today, 2018
    Co-Authors: Lu Zhang, Wei Wu, Yongjie Zhang, Xianchao Zhou
    Abstract:

    Abstract In this paper, the municipal solid waste was used as raw material to produce clean synthesis gas via Catalytic Gasification and reforming technology and gas purification unit. Nickel based catalysts with different Ce content were prepared by impregnation, then the effects of operating parameters including the oxygen addition, steam addition and Ni-based catalysts’ component on synthesis gas generation characteristics were studied. The results indicated that the increasing of oxygen injection and steam supply can improve the carbon conversion efficiency and cold gas efficiency. The addition of metal additives in Ni-based catalyst can promote the decomposition of tar and increase synthesis gas yield. At the temperature of 850 °C, equivalence ratio = 0.06, steam/carbon ratio = 3.6, the clean synthesis gas was produced with hydrogen concentration of 36.78 vol.% and carbon monoxide concentration of 15.29 vol.% via Catalytic Gasification and reforming process. The cold gas efficiency and carbon conversion rate were 70.17% and 87.17%, respectively. The yield of syngas was up to 0.679 m3/kg and the tar content was reduced to 17.76 g/Nm3. After the purification of the gas purification unit, the phenolic compounds were completely removed. The content of SO2 and NOX gas can meet the emission standard of air pollutants, and the average removal efficiency of heavy metal Cr, Pb, Zn, Cu and Hg was above 50%.

Xianbin Xiao - One of the best experts on this subject based on the ideXlab platform.

  • Synthesis gas production from Catalytic Gasification of waste biomass using nickel-loaded brown coal char
    Fuel, 2011
    Co-Authors: Xianbin Xiao, Liuyun Li, Xianliang Meng, Yukiko Ogawa, Kazuyoshi Sato, Duc Dung Le, Jingpei Cao, Takayuki Takarada
    Abstract:

    This paper presents an experimental research concerning the Catalytic Gasification of waste biomass to synthesis gas using Ni-loaded brown coal char (Ni/BCC). The attention is focused on the Catalytic conditions for enhancing the synthesis gas production, improving its composition and extending the catalyst lifetime. The aim is achieved by means of the characterization of Ni/BCC and the product gas analysis, through Gasification experiments of a woody biomass and an animal-waste-derived biomass both in a fixed bed reactor and a fluidized bed reactor at various Catalytic temperatures and steam/biomass–carbon (S/C) ratios. Effects of the pyrolysis temperature and the steam treatment on the nickel crystallite size are analyzed and used as the reference of choosing optimum Gasification conditions. With brown coal char as support material, Ni/BCC is found as an excellent catalyst even at low temperature of about 650 °C and shows a good resistance ability of coke formation, compared to non-catalyst and Ni/Al2O3. More than 25 h continuous operation is also performed in a 1 kg/h Internally Circulating Fluidized-bed Gasifier (ICFG) to assess the lifetime of Ni/BCC. Smaller S/C ratio at the appropriate temperature is suggested to lower the coal char Gasification, thereby reducing the degradation of the support material.

Wenli Song - One of the best experts on this subject based on the ideXlab platform.

  • Catalytic Gasification of char from co pyrolysis of coal and biomass
    Fuel Processing Technology, 2008
    Co-Authors: Wenli Song
    Abstract:

    The Catalytic Gasification of char from co-pyrolysis of coal and wheat straw was studied. Alkali metal salts, especially potassium salts, are considered as effective catalysts for carbon Gasification by steam and CO2, while too expensive for industry application. The herbaceous type of biomass, which has a high content of potassium, may be used as an inexpensive source of catalyst by co-processing with coal. The reactivity of chars from co-pyrolysis of coal and straw was experimentally examined. The chars were prepared in a spout-entrained reactor with different ratios of coal to straw. The Gasification characteristics of chars were measured by thermogravimetric analysis (TGA). The co-pyrolysis chars revealed higher Gasification reactivity than that of char from coal, especially at high level of carbon conversion. The influence of the alkali in the char and the pyrolysis temperature on the reactivity of co-pyrolysis char was investigated. The experimental results show that the co-pyrolysis char prepared at 750 degrees C have the highest alkali concentration and reactivity. (C) 2008 Elsevier B.V. All rights reserved.