Thermogravimetric coupled with Fourier transform infrared analysis study on thermal treatment of monopotassium phosphate residue

doi:10.1007/s11783-011-0322-6

Front Envir Sci Eng Chin

2011, Vol. 5

Issue (2) : 186-192 https://doi.org/10.1007/s11783-011-0322-6

RESEARCH ARTICLE

Thermogravimetric coupled with Fourier transform infrared analysis study on thermal treatment of monopotassium phosphate residue

Yuheng FENG¹, Xuguang JIANG¹(

), Yong CHI¹, Xiaodong LI¹, Hongmei ZHU²

1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; 2. Hangzhou Huanjie Environment Engineering Co. Ltd., Hangzhou 310027, China

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Abstract

In China, safe disposal of hazardous waste is more and more a necessity, urged by rapid economic development. The pyrolysis and combustion characteristics of a residue from producing monopotassium phosphate (monopotassium phosphate residue), considered as a hazardous waste, were studied using a thermogravimetric, coupled with Fourier transform infrared analyzer (TG-FTIR). Both pyrolysis and combustion runs can be subdivided into three stages: drying, thermal decomposition, and final devolatilization. The average weight loss rate during fast thermal decomposition stage in pyrolysis is higher than combustion. Acetic acid, methane, pentane, (acetyl) cyclopropane, 2,4,6-trichlorophenol, CO, and CO₂ were distinguished in the pyrolysis process, while CO₂ was the dominant combustion product.

Keywords hazardous waste combustion pyrolysis thermogravimetric coupled with Fourier transform infrared analysis (TG-FTIR) monopotassium phosphate residue

Corresponding Author(s): JIANG Xuguang,Email:jiangxg@zju.edu.cn

Issue Date: 05 June 2011

Cite this article:

Yuheng FENG,Xuguang JIANG,Yong CHI, et al. Thermogravimetric coupled with Fourier transform infrared analysis study on thermal treatment of monopotassium phosphate residue[J]. Front Envir Sci Eng Chin, 2011, 5(2): 186-192.

URL:

https://academic.hep.com.cn/fese/EN/10.1007/s11783-011-0322-6
https://academic.hep.com.cn/fese/EN/Y2011/V5/I2/186

Tab.1 Proximate and ultimate analysis of the monopotassium phosphate residue

Fig.1 Comparative weight loss curves (TG curves) and DTG curves for combustion and pyrolysis of monopotassium phosphate residue

Fig.2 FTIR spectrum of products evolving from a monopotassium phosphate residue sample, at 145℃

Fig.3 FTIR spectrum of pyrolysis products from monopotassium phosphate residue sample, at 450°C (maximum weight loss rate)

Fig.4 FTIR spectrum of combustion products in air, at 409°C (maximum weight loss rate)

Fig.5 Evolution of volatiles with temperature – TGA-FTIR (nitrogen): (a) methane; (b) pentane; (c) acetic acid; (d) cyolopropane, acetyl; (e) 2,4,6-trichlorophenol; (f) CO

Fig.6 Evolution of CO with temperature during thermal treatment– TG-FTIR (air)

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