TG-FTIR analysis of pyrolusite reduction bymajor biomass components

Yunfei Long; Le Ruan; Xiaoyan Lü; Yiju Lü; Jing Su; YanxuanWen

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TG-FTIR analysis of pyrolusite reduction bymajor biomass components

能源、资源与环境技术 | Updated：2026-01-06

- TG-FTIR analysis of pyrolusite reduction bymajor biomass components
- Chinese Journal of Chemical Engineering Vol. 23, Issue 10, Pages: 1691-1697(2015)
- Affiliations：
  
  2 College of Chemistry and Bioengineering, Guilin University of Technology,Guilin,China,541004
- Author bio：
- Funds：
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- Published：2015
- Accepted：
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Yunfei Long, Le Ruan, Xiaoyan Lü, Yiju Lü, Jing Su, YanxuanWen. TG-FTIR analysis of pyrolusite reduction bymajor biomass components[J]. Chin.J.Chem.Eng., 2015, 23(10): 1691-1697.
DOI：

Yunfei Long, Le Ruan, Xiaoyan Lü, Yiju Lü, Jing Su, YanxuanWen. TG-FTIR analysis of pyrolusite reduction bymajor biomass components[J]. Chin.J.Chem.Eng., 2015, 23(10): 1691-1697. DOI：

摘要

Abstract

Pyrolusite reduction processes by three major biomass components cellulose

hemicelluloses and lignin

represented by CP

HP and LP

respectively

were investigated by thermogravimetric analyzer coupled with Fourier transforminfrared spectrometry (TG-FTIR). The Šesták-Berggren (SB) equationwas used to evaluate the kinetics of reduction processes. TG analysis reveals that the main reduction processes occur at 250-410 ℃

220-390 ℃

and 190-410 ℃ for CP

and LP

respectively. FT-IR and XRD results indicate that various reducing volatiles (e.g. aldehydes

furans

ketones and alcohols) are produced from the pyrolysiswith the three major components

which directly reduce MnO

in ore to MnO. The processes are described by the SB equationwith three parameters (m

p). Their non-zero values suggest that pyrolusite reduction is controlled by the diffusion of reducing gaseous products through an ash/inert layer associated with minerals. The apparent activation energies for pyrolusite reduction by CP

HP and LP are 40.48

25.70 and 40.10 kJ·mol

-1

respectively.

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