Effect of preparation of wood raw materials and some processing modes on the output of liquid pyrolysis products

R R Safin,S R Mukhametzyanov,G F Ilalova,N R Galyavetdinov,I A Valeev,A V Safina,E.V Shamsutdinov,V.V Sergeev,Yu.V Vankov

doi:10.1051/e3sconf/201912401020

R R Safin, S R Mukhametzyanov + Show 7 more

Open Access

https://doi.org/10.1051/e3sconf/201912401020

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Abstract

Today, the limitations of traditional energy sources based on oil, natural gas and coal are becoming obvious. Therefore, the search for new sources of energy is a pressing issue both for modern Russia and for the whole world. The alternative sources of energy, based on the use of bioenergy of biomass, begin to play a significant and growing role in the world energy industry. The article presents the curves of changes in the mass yield of products obtained during the pyrolysis of biomass, thermally pre-treated in the temperature range of 180-270 °C without access of oxygen. It has been experimentally proved that pre-heat treatment reduced the total liquid yield in the pyrolysis process: with an increase in the processing temperature, the mass yield of the liquid decreased, but the mass yield of charcoal and gas changed slightly. At the same time, it was found that the temperature affected the yield of the elemental composition of biomass: as the temperature increased, the content of elemental carbon in the biomass increased, while the content of hydrogen and oxygen decreased. It is concluded that the preliminary heat treatment of biomass can improve the quality of the final liquid biofuel by reducing the water content in it and by increasing the heat of combustion. It is also found that pressure reduction during the pyrolysis process increased the yield of the liquid fraction of decomposition products.

Highlights

There is a huge amount of plant waste from the production of grain, oilseeds and other crops in Russia every year, which adversely affects land and water resources
In the course of the research, mass yields of solid and liquid media were calculated for each sample by analyzing the mass of liquid and coal collected on the total mass
According to the obtained research results, it can be noted that the preliminary heat treatment of biomass reduces the overall liquid yield during the pyrolysis process

Summary

Introduction

There is a huge amount of plant waste from the production of grain, oilseeds and other crops in Russia every year, which adversely affects land and water resources. In this regard, the active searches for methods of efficient use of waste of annual crops are going on all over the world. It should be noted that the technology of creating this product is environmentally friendly, because it proceeds without the use of chemicals, and the decomposition products of biomass released during pyrolysis are fully captured and used as biofuel. The yield of products obtained during the pyrolysis of biomass mainly depends on the chemical composition of raw materials and operating temperature. The pyrolysis processes can be divided into three subclasses: ordinary pyrolysis, fast pyrolysis and instant pyrolysis

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