Rice Husk as a Source for Lightweight Flameless Heat-Energy Carbon Briquettes

K. Zhumakhan1,2,#

Ye. Tileuberdi3,#,Email

M. Biysenbayev2

Ye. Ongarbayev1

K. Zhanbekov3

N. Godbert4,Email

K. Tastambek5,6

C. Oliviero Rossi7

1Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, 71, al-Farabi ave., Almaty, Kazakhstan.

2LLP Scientific and Production center (Zhalyn), 11, Pavlodarskaya st., Almaty, Kazakhstan.

3Institute of Natural Sciences and Geography, Abai Kazakh National Pedagogical University, 13, Dostyk ave., Almaty, Kazakhstan.

4MAT_InLAB (Laboratorio di Materiali Molecolari Inorganici), Centro di Eccelenza CEMIF.CAL, LASCAMM CR-INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Universita` della Calabria, 87036 Arcavacata di Rende (CS), Italy.

5M. Auezov South Kazakhstan University, 5, Tauke khan ave., Shymkent, Kazakhstan.

6Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkistan, 161200, Kazakhstan.

7Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Cubo 14D, 87036, Arcavacata di Rende (CS), Italy.

#These authors contributed to this work equally.


Herein we present a new method for producing fuel briquettes from rice husk, which can be used both individually or in combination. The designed briquettes are light-weighted and characterized by a flameless combustion that do not emit toxic substances during burning. These new briquettes were shaped from amorphous carbon obtained by carbonization of rice husks that was carried out in an inert atmosphere (N2/Ar) at the temperature 450 °C, followed by desilication using caustic soda for 2 hours and demineralization using nitric acid for 2 hours. To the thus obtained raw material, carboxymethyl cellulose (CMC) used as biobinder was added to form the briquettes and bind the carbon-based materials. In order to obtain briquettes of suitable hardness for all purposes (ca. 30 MPa of briquette strength), 20% of biobinder was necessary. Oxygenating reagents (NaNO3 and NH4NO3) were also added to ensure high performant briquette flameless combustion. Based on the fact that these briquettes are mainly carbon-based materials with the containing 70-90% and therefore are characterized with a rather light overall weight during 30-38 g.

Rice Husk as a Source for Lightweight Flameless Heat-Energy Carbon Briquettes