不同原料烘焙炭的理化特性及对亚甲基蓝的吸附性能

doi:10.11896/cldb.17120234

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Abstract Torrefied biochrs were produced from the pyrolysis of rubber seed shell, walnut, wood power as well as coconut shell respectively, at 300 ℃. The adsorbents of methylene blue (MB) aqueous solution by four biochars were investigated. The effect of MB of pH, contract time, initial solution concention and adsorbent dosage on the adsorption properties was also estimated. The kinetic data were analysised by the pseudo-first, second-order kinetic and intraparticle diffusion, and the equilibrium data were analyzed using the Langmuir and the Freundlich isotherms models. The results showed that:adsorption equilibrium was reached within 60 min at 298.15 K under the proper pH value between 8.0—12, and the adsorption capacity increasing with the rise of initial MB concentration. While, it was found that the adsorption kinetic followed the second-order mo-del. This suggested that the adsorption of MB by pyrocarbon was a chemisorptions process, and the intraparticle diffusion was not the primary rate-determining step. Besides, Langmuir and the Freundlich isotherms models were all fitting the equilibrium data. The thermodynamics properties showed that adsorption of four biomass was endothermic and spontaneous with the rise of the temperature, the adsorption degree of four biomass pyrocarbon were as followed:walnut shell＞wood power＞coconut shell＞rubber seed shell

Key words： torrefied carbon physicochemical properities adsorption performance methylene blue kinetic

Published: 28 April 2019

CLC number:

TB33

Fund:This work was financially supported by the Applied Basic Research Programs of Science and Technology Department of Yunnan Province (2018FB071), the Yunnan Provincial Department of Education Project Foundation (2018JS325) and the National Natural Science Foundation of China (31670599).

About author:: Yunwu Zheng, received his Ph.D. degree in Bio-materials Engineering from the Northeast Forestry University (NEFU) in Sep. 2014—Jun. 2017. He was appointed to the faculty upon graduation to Southwest Forestry University (SWFU), and is currently an associate professor of the SWFU. ; Zhifeng Zheng obtained his Ph.D. degree from the Northeast Forestry University (NEFU) and served in School of Materials of Science and Engineering of SWFU, till now.

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	ZHENG Yunwu
	TAO Lei
	KANG Jia
	HUANG Yuanbo
	LIU Can
	ZHENG Zhifeng

Cite this article:

ZHENG Yunwu,TAO Lei,KANG Jia, et al. Physicochemical Properties of Torrefied Biochar from Different Biomass Feedstock and Its Adsorption Performance for Methylene Blue[J]. Materials Reports, 2019, 33(8): 1276-1284.

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http://www.mater-rep.com/EN/10.11896/cldb.17120234 OR http://www.mater-rep.com/EN/Y2019/V33/I8/1276

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