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Citation: CHANG Guo-zhang, HUANG Yan-qin, LAI Xi-rui, YIN Xiu-li, WU Chuang-zhi. Experimental study on the structure and reactivity of palm kernel shell chars duing CO2 gasification[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(8): 947-954. shu

Experimental study on the structure and reactivity of palm kernel shell chars duing CO2 gasification

  • 1.

    1. CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Acedemy of Sciences, Guangzhou 510640, China;

  • Corresponding author: HUANG Yan-qin, 
  • Received Date: 19 January 2015
    Available Online: 18 April 2015

    Fund Project: 国家自然科学基金(51176194) (51176194)广东省战略新兴产业项目(2012A032300019)。 (2012A032300019)

  • The palm kernel shell(PKS) chars of different conversions were prepared in a tube furnace by using CO2 as gasification agent, and the gasification reactivity of PKS chars were tested by thermogravimetry analyzer. The pore structure, degree of carbon structure ordering, mineral element content and distribution of PKS chars of different conversions were characterized by surface area measurement, Raman spectra, X-ray flourimeter(XRF), scanning electron microscopy and energy dispersive X-ray spectroscopy(SEM-EDX), respectively. The results show that the fixed carbon content of PKS chars reduces gradually, and the proportion of ordered carbon stabilizes at 0.30~0.33 during CO2 gasification. The ash content increases gradually along with the increasing of conversion, but the gasification reaction index Rs of PKS chars increases after a decreased stage. At the early stage of pore size expansion (conversion x< 23%), the change tendency of Rs of PKS chars is in accordance with the surface area. As the gasification reaction continues (23%< x< 31%), Rs has few changes. The surface area of PKS chars has a linear correlation with the conversion from 31% to 68%, and Rs increases with the increasing surface area and the catalysis of mineral elements as x> 56%. When x> 68%, the Rs of PKS chars is mainly controlled by catalysis of minerals.
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