Effect of reburning temperature on physico-chemical characteristics evolution of rice husk char

SHI Jia-teng; YIN Xin-yi; LU Ping; HU Xi-ming

Volume 45 Issue 8

Aug. 2017

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Article Navigation > Journal of Fuel Chemistry and Technology > 2017 > 45(8): 924-931

SHI Jia-teng, YIN Xin-yi, LU Ping, HU Xi-ming. Effect of reburning temperature on physico-chemical characteristics evolution of rice husk char[J]. Journal of Fuel Chemistry and Technology, 2017, 45(8): 924-931.

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SHI Jia-teng, YIN Xin-yi, LU Ping, HU Xi-ming. Effect of reburning temperature on physico-chemical characteristics evolution of rice husk char[J]. Journal of Fuel Chemistry and Technology, 2017, 45(8): 924-931.

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Effect of reburning temperature on physico-chemical characteristics evolution of rice husk char

School of Energy & Mechanical Engineering, Nanjing Normal University, Nanjing 210042, China

Funds:

The project was supported by the National Natural Science Foundation of China 51476079

Jiangsu Province Prospective Cooperation Research Project of China BY2015001-01

Jiangsu Province Major Project of University Natural Science Research of China 15KJA610002

Received Date: 2017-04-07
Rev Recd Date: 2017-06-15

Available Online: 2021-01-23

Publish Date: 2017-08-10

Abstract

Abstract

Different kinds of rice husk (RH) char were prepared in an entrained flow reactor under reburning conditions. The physico-chemical properties of pyrolyzed RH chars were characterized by scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), specific surface area and pore size analyzer, X-ray diffraction (XRD) and Fourier transform infra-red (FT-IR) spectroscopy, respectively. The effects of temperature on evolution of physico-chemical structures of RH chars were discussed. The results indicate that the specific surface area and pore volume of RH chars increase significantly from 850 to 1 150 ℃. The order of release of alkaline and alkaline earth metals (AAEMs) bound in RH is Na > Ca > Mg > K. With increasing reaction temperature, release fractions of AAEMs generally increase firstly and then being stable, and the chlorine release fraction increases gradually. AAEMs in RH chars are mainly in the form of silicate and sulfate. The surface oxygen-containing functional groups in RH chars decrease significantly with increasing temperature.
- reburning,
- rice husk,
- rice husk char,
- temperature,
- physico-chemical characteristics,
- alkaline and alkaline earth metals

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References(25)

References

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