PROCESSING OF SUNFLOWER HUSK BY OXIDATIVE TORREFACTION

UDC 62-664.2

  • Svetlana Ivanovna Islamova Institute of Energy and Advanced Technologies FRC KazSC RAS Email: isvetulia@mail.ru
  • Aleksey Borisovich Dobrynin Institute of Organic and Physical Chemistry A.A. Arbuzov FRC KazSC RAS; Kazan National Research Technical University named after V.I. A.N. Tupolev Email: aldo@iopc.ru
DOI_disc_logo https://doi.org/10.14258/jcprm.20220110226
Keywords: biomass, sunflower husk pellets, oxidative torrefaction, kaolin, thermal properties, morphology, mass yield, water absorption

Abstract

The paper presents for the first time an experimental study of the processing of sunflower husk pellets by oxidative torrefaction inside a kaolin chamotte layer. The process temperature was 280 °C, which contributed to significant changes in the chemical composition, thermal properties and morphology of plant biomass. Kaolin chamotte was used to limit the supply of oxygen to sunflower husk and suppress oxidation reactions and didn’t have a catalytic effect on the biomass destruction process. Torrefaction time and layer height of kaolin chamotte varied in the range of 30-60 min and 3-5 cm, respectively. As a result of oxidative torrefaction, a decrease in the amount of volatiles in sunflower husk was obtained, as well as an increase in ash content and fixed carbon. Comparison of the atomic ratios H/C and O/C before and after torrefaction showed that the elemental composition of sunflower husk shifted toward peat. The maximum value of the heat of combustion (22 MJ/kg) was obtained for the sample torrefied at 60 min and 4 cm. The diffusion mode of torrefaction was carried out at the investigated temperature, and the process time had the greatest influence on the change in the mass yield. It was found that during oxidative torrefaction kaolin chamotte effectively reduced the diffusion of oxygen into the biomass and suppressed the oxidation reactions. The obtained torrefied sunflower husk were characterized by improved fuel properties, which can positively affect the speed and efficiency of their subsequent thermochemical conversion.

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Author Biographies

Svetlana Ivanovna Islamova, Institute of Energy and Advanced Technologies FRC KazSC RAS

кандидат технических наук, научный сотрудник лаборатории энергетических систем и технологий

Aleksey Borisovich Dobrynin, Institute of Organic and Physical Chemistry A.A. Arbuzov FRC KazSC RAS; Kazan National Research Technical University named after V.I. A.N. Tupolev

кандидат химических наук, научный сотрудник лаборатории дифракционных методов исследований, доцент кафедры конструирования и технологии производства электронных средств

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Published
2022-03-10
How to Cite
1. Islamova S. I., Dobrynin A. B. PROCESSING OF SUNFLOWER HUSK BY OXIDATIVE TORREFACTION // chemistry of plant raw material, 2022. № 1. P. 325-334. URL: http://journal.asu.ru/cw/article/view/10226.
Issue
No 1 (2022)
Section
Technology

Copyright (c) 2022 chemistry of plant raw material

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