Wood Pyrolysis using Aspen plus simulation and its Industrial Application

7/25/2019 Wood Pyrolysis using Aspen plus simulation and its Industrial Application

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WOOD DUST PYROLYSISUSING ASPEN PLUSSIMULATION AND ITS

INDUSTRIAL APPLICATION

By- Aloy Palit, Institute of EnvironmentalTechnology, VB - TU Ostrava.

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teofEnvironm

entalTechnology,V

B-TU

Ostrav

a.


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INTRODUCTION

Pyrolysis is a modern thermo chemicaldecomposition processes at elevated temperaturein absence of oxygen

The contents of gas contains mainly H2,CO,CO2,H2O

The liquid phase is called Tar.

Cellulose, Hemicelluloses and lignin along withlesser amounts of Extractive , moisture contentare used as FEED in the reactor

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DEFINATION

Institute of EnvironmentalTechnology, VB-TU Ostrava.

Thermal

decomposition of

organic material at

elevatedtemperatures in the

absence of oxygen

Involves chemical

change of chemical

composition andphysical phase

Irreversibl

e

Endothermic


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WHAT IS PY!"YSIS#


STEP PHENOMENA IN PLACE


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WHAT IS PY!"YSIS#

PYROLYSIS PRODUCT

$har


%io !il

Syn&as


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TYPES OF PYROLYSIS


Dry Pyrolysis Low Temperature

Analysis Medium TemperatureAnalysis High TemperatureAnalysis


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Process of thermal decomposition withoutaccess of oxygen (O)

Product of dry pyrolysis are gas with high

heat of combustion, liquid and solid carbonresidue.

Type of dry pyrolysis depend on thetemperature of the process.


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PROCESS DESCRIPTION

The following experiments are performedTemperature: 300-800 CPressure: 101325 Pa

For agricultural waste, for example, typicaltemperatures are 450 to 550 C

In Aspen Plus Property Parameter is set -

Property methods: PENG-ROBStream class: MIXCINC

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SIMULATION USING ASPEN PLUS

Ultimate analysis

wt. %

ComponentSpruce wood - sawdust

C51,75

H 6,09

N0,96

O40,60

Proximate analysis

wt. %

ComponentSpruce wood - sawdust

Moisture17,30

Volatiles77,51

Fixed C1,!9

"s#0,60

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FLOW SHEET MODEL

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Flow sheet of decomposition of the spruce wood


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MODEL EXPLANATION

Flow sheet of syngas production is shown on figure

Spruce wood is decomposed in the RYIELD reactor

to the elements by ultimate analysis.

hese elements are going to the R!I""S reactor#

where syngas is created by thermodynamics

e$uilibrium for gi%en temperature and pressure.

he solid residue is di%ided in R!I""S reactor. he

gaseous mi&ture is cooled to '()* and di%ided in

separator +FL,S-' to gas and li$uid +only water.

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RESULTS FROM ASPEN MODEL

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he gas composition is shown on fig. '.


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YIELD OF PRODUCT VS.TEMPERATURE The important thing is, that these gas are created from elements by thermodynamicequilibrium at given temperature and pressure.

It is not same way of gas creating as in batch Pyrolysis in lab with a gradualincrease in temperature.

The amount of solid residue is controlled to 600 C according to the content of fixedcarbon. At higher temperatures, then oxidation of the fixed carbon started andcarbon monoxide is created, as is also seen in increase in the concentration of CO

Increasing content of CO, H2 has big effect on the low heating value of the producedsyngas.

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EXPERIMENTAL PROCESSDESCRIPTION

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eactor is used in Pyrolysis Experiment

'ifferent gas sample (as ta)en from a range of * +,** )*

Spure (ood (as used a -EE' ./** gms0

Acetone and Water is used in Tubes as an Adsorbent1


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GAS CHROMATOGRAPHY

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Fig/he figure Indicate the composition of all gas collected during the E&periment


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INDUSTRIAL APPLICATION

Pyrolysis has been used since ancient times for turning wood Intocharcoal on an industrial scale.

Residues of incomplete organic Pyrolysis, e.g., from cookingBiochar improves thesoil textureandecology, increasing its

ability to retain fertilizers and release them slowly.

Pyrolysis of waste tires (WT) is an attractive alternative to newdisposal mechanism , allowing the high energy content of the tireto be recovered as fuel. Using tires as fuel produce equal energy .

Industrial application of Spure Wood Pyrolysis is used inObtaining the hydrocarbon and gases from the FEED.

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https://en.wikipedia.org/wiki/Soil_structurehttps://en.wikipedia.org/wiki/Ecologyhttps://en.wikipedia.org/wiki/Ecologyhttps://en.wikipedia.org/wiki/Soil_structure


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PROS N CONS


e2uires drying of

soil

Ineffective in

destroying or

physically separating

inorganic from the

contaminated

medium1

e2uiring propertreatment3 storage3

and disposal for

ha4ardous (astes1

$heap and

economical system Environment+

friendly3

Energy+efficient


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CONCLUSION

The important thing is, that these gas are created from elementsby thermodynamic equilibrium at given temperature and pressure.

It is not same way of gas creating as in batch Pyrolysis in lab with

a gradual increase in temperature.

It is obvious that modeling through decomposition and subsequentformation of gas based on the thermodynamics equilibrium is notappropriate for modeling of spruce Pyrolysis.

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ACKNOWLEDGMENT

I would like to extend my Sincere thanks to

Professor Lucie ObalovLestinsky PavelBarbora GrycovaAdrian Pryszcz

And other fellow member of Institute ofEnvironmental Technology, VSB TU Ostrava.

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END

Thank you for your kind attention

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Wood Pyrolysis using Aspen plus simulation and its Industrial Application

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