Thermal stability of metal-lignin composites prepared by coprecipitation method

Qiangu Yan; Charles R. Boardman; Zhiyong Cai

doi:10.1016/j.tca.2020.178659

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Thermal stability of metal-lignin composites prepared by coprecipitation method

Formally Refereed

Authors:

Qiangu Yan, Charles R. Boardman, Zhiyong Cai

Year:

2020

Type:

Scientific Journal

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.1016/j.tca.2020.178659

Source:

Thermochimica Acta. 690: 178659.

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Abstract

In present work, Fe-lignin composites were prepared by chemical coprecipitation of metal salts and kraft lignin; the thermal stability of the Fe-lignin mixture was then investigated at temperatures up to 300 °C using thermogravimetric analysis (TGA) and diferential scanning calorimetry (DSC) at a heating rate of 5 °C min⁻¹ under nitrogen atmosphere. The structural characteristics of Fe-lignin thermal treated under diferent temperatures were identifed by Fourier transform infrared (FTIR) spectrometry. The temperature-programmed thermal decomposition (TPD) of Fe-lignin samples was carried out in a fxed-bed reactor; the gaseous products were analyzed qualitatively and quantitatively by an on-line quantitative gas ana ysis system. The temperature and pressure of the reactor were monitored and recorded during the thermal decomposition process. It was observed, the therma decomposition of Fe- lignin samples is a strong exothermic process, and a signifcant amount of heat is re eased from the reaction, which triggers a thermal runaway situation.

Keywords

Kraft ignin, Fe-lignin composites, thermal stability, Fe content and solvents, thermal runaway

Citation

Yan, Qiangu; Boardman, Charles R.; Cai, Zhiyong. 2020. Thermal stability of metal-lignin composites prepared by coprecipitation method. Thermochimica Acta. 690: 178659.