Pyrolysis of pine wood and characterisation of solid and liquid products

Barnasan Purevsuren,Jargalmaa Soninkhuu,Otgonchuluun Dashzeveg,Ariunaa Alyeksandr,Narangerel Janchig

doi:10.5564/mjc.v19i45.1086

Barnasan Purevsuren, Jargalmaa Soninkhuu + Show 3 more

Open Access

https://doi.org/10.5564/mjc.v19i45.1086

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Abstract

Pyrolysis of pine wood was carried out at different temperatures and the yields of solid (biochar), liquid (tar and pyrolysed water) and gas products were determined. Temperature around 500 ºC was determined as an optimal heating temperature of pyrolysis and approximately 27.1% hard residue (biochar), 21.46% tar, 20.04% pyrolysed water and 31.30% gas were obtained by pyrolysis. The thermal stability indices of pine wood are relatively low, which are indications of its low thermal stability and high yield of volatile matter (Vdaf = 90.3%). The thermal stability indices of pyrolysis of solid residue show that it is characterised by a very high thermal stability than its initial sample, for example, there was an increase of Т5% 7.7 and Т15% 3.8 times. The chemical composition of pyrolysed tar of pine wood has also been determined. Were obtained 4 different fractions with varying boiling temperature ranges of pine wood pyrolysed tar and have determined the yields of each fraction. Neutral tar was analysed by GC/MS and 20 aliphatic compounds, 25 aromatic compounds and 18 polar compounds were determined.

Highlights

Mongolia is a country with a scant wood resource, as only 8-9% of the northern part of the country’s territory is covered by forest
0.56 1.6 1.6 4.5 4.6 7989 8165 pyrolysed hard residue of pine wood waste decreased 19.6 times compared with feed wood
The analytical sample of pine wood waste was a subject for FTIR analysis and the spectra is shown in Figure 1 and Table 2 respectively

Summary

Introduction

Mongolia is a country with a scant wood resource, as only 8-9% of the northern part of the country’s territory is covered by forest. Intensive thermal decomposition of the organic matter of pine wood sample and formation of liquid (tar and pyrolysed water) and gas products starts in the third step (300-400 oС) during the pyrolysis.

Results

Conclusion