BIO-GAS, BIO-OIL AND BIOCHAR PRODUCTION FROM PYROLYSIS OF TOBACCO WASTE PDF

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BIO-GAS, BIO-OIL AND BIOCHAR PRODUCTION FROM PYROLYSIS OF TOBACCO WASTE Emilija Popovic1*, Vladimir Strezov2, Risto V. Filkoski1, Pushan Shah2 1Faculty of Mechanical Engineering, University "Ss Cyril and Methodius" Macedonia 2Graduate School of the Environment, Faculty of Science, Macquari...

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BIO-GAS, BIO-OIL AND BIOCHAR PRODUCTION FROM PYROLYSIS OF TOBACCO WASTE Emilija Popovic1*, Vladimir Strezov2, Risto V. Filkoski1, Pushan Shah2 1Faculty

of Mechanical Engineering, University "Ss Cyril and Methodius" Macedonia 2Graduate School of the Environment, Faculty of Science, Macquarie University NSW 2109, Australia

INTRODUCTION 1.6

Specific Heat (MJ/m K)

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Biomass residues have potential applications as energy sources and the use of carbon neutral renewable energy sources is becoming increasingly important to achieve carbon emission reductions. Tobacco waste (dust) is a by product of the tobacco manufacturing industry which has been largely neglected as an energy source. This waste is a biomass material with a potential to produce bio-fuels and biochar through a pyrolysis process. This work investigates pyrolysis of tobacco waste (dust) and evolution of the products of pyrolysis. The Thermogravimetric Analyser, computer aided thermal analyses, Fourier Transform Infrared Spectroscopy and Gas Chromatographic techniques were used with heating range from 10 to 500oC under slow pyrolysis conditions. The biodegradation process was studied, so the environmental pollution can be reduced while producing the biofuels and biochar. The potential applications of tobacco waste for energy conversion are discussed in this work.

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Temperature ( C)

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FIG.2. SPECIFIC HEAT OF TOBACCO WASTE AS OBTAINED BY COMPUTER AIDED THERMAL ANALYSIS

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METHODOLOGY

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• Tobacco waste (dust) sample was pyrolysed and products of pyrolysis analysed

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Weight (%)

• The tobacco waste and produced bio-chars were analysed with FTIR spectroscopy • Thermal analysis of the sample was performed with the Computer Aided Thermal Analysis technique pyrolysed at 10oC/min

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• Mass loss of the sample was monitored with Thermogravimetric Analysis (TGA)

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RESULTS

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FIG.3. TGA RESULTS

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The raw biomass sample, the char and tar samples heated under inert conditions at temperatures below 500oC showed several peaks related to lignin decomposition and some aromatic structures. These peaks slowly disappeared at around 500oC. Decomposition commenced at around 150 oC with an endothermic reaction, followed with a large exothermic thermal decomposition at around 340 oC. The reactions at a higher temperature range detected at 500 and 750oC are identified as endothermic. Thermal decomposition of tobacco waste went through four distinctive reaction regions, with each reaction corresponding to associated weight loss: T=105 - 190 oC T=190 - 337 oC T=470 - 520 oC T=700 - 755 oC

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Temperature (oC)

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ΔHv1 = 15.2 MJ/m3 ΔHv2 = -38.3 MJ/m3 ΔHv3 = 1.52 MJ/m3 ΔHv4 = 2.59 MJ/m3

WL1 = 9% WL2 = 35.1% WL3 = 12.8% WL4 = 9%

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CONCLUSIONS

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Pyrolysis of tobacco waste may provide an option for its management and upgrading to bio-gas, bio-oils and bio-char. The pyrolsys process is largely exothermic, which shows lower energy requirements for pyrolysis, comparing to other waste products. Further detailed analysis of the bio-oils and bio-char is required to determine the potential value of these products.

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FIG.1. FTIR RESULTS A) TAR B) CHAR

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