Citation: CHEN Qun, PANG Ren-zhong, CHEN Xi, YANG Rui-ming, ZHUO Yu-qun, CHEN Chang-he. Determination of specific heat capacity of biomass char during pyrolysis[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(9): 1040-1046. shu

Determination of specific heat capacity of biomass char during pyrolysis

1.
Research Center for Saline-alkali Soil Rectification and Carbon Fixation, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: CHEN Qun,
Received Date: 29 March 2014
Available Online: 11 June 2014
Fund Project: 国家自然科学基金(51276099) (51276099)清华大学自主科研计划(2011Z02147)。 (2011Z02147)

The specific heat capacities of chars during primary pyrolysis of biomass with different conversion and the heat capacities of virgin biomass were determined. The ratio method was employed to measure the specific heat capacities of two biomass samples and their pyrolyzed chars through thermogravimetry and differential scanning calorimetry (TG-DSC). A mathematical model was developed to calculate values of specific heat of chars. The results show that the specific heat capacities of the two biomass samples and their derived chars increase linearly within 60~200℃. The values of the specific heat capacity of the chars are lower than those of the virgin biomass samples. The specific heat of chars decreases as the extent of pyrolysis increases. The calculated specific heat capacities from the developed mathematical model are quite close to those measured by TG-DSC analyses between 150~200℃.
- biomass,
- primary pyrolysis,
- biochar,
- specific heat capacity,
- TG-DSC
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