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Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels

An investigation was carried out to study the effects of hydrothermal a carbonization on various agricultural wastes. A dual chamber reactor was designed to carry out the hydrothermal and vapothermal carbonization processes.From the experiments, the highest energy densification achieved was 1.280 in...

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Main Author: Yeoh, Keat Hor
Format: Thesis
Language:English
Published: 2016
Subjects:
T Technology
TA349-359 Mechanics of engineering. Applied mechanics
Online Access:http://eprints.usm.my/45768/1/Hydrothermal%20And%20Vapothermal%20Carbonization%20Of%20Agricultural%20Wastes%20To%20Produce%20Solid%20Fuels.pdf
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spelling my.usm.eprints.45768 http://eprints.usm.my/45768/ Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels Yeoh, Keat Hor T Technology TA349-359 Mechanics of engineering. Applied mechanics An investigation was carried out to study the effects of hydrothermal a carbonization on various agricultural wastes. A dual chamber reactor was designed to carry out the hydrothermal and vapothermal carbonization processes.From the experiments, the highest energy densification achieved was 1.280 invapothermal carbonization and 1.145 in hydrothermal carbonization for oil palm empty fruit bunches. Comparison of the hydrochar produced from both processes shows that vapothermal carbonized materials have higher heating values and higher fixed carbon contents as compared to those from hydrothermal carbonization process. Volatile matter of vapothermal carbonized materials have drops about 20% while their fixed carbon content are increased by 70-95% compare to the raw feedstock. With the supports of the SEM pictures and DTG curves of the products, it was concluded that the reaction mechanism during the hydrothermal and vapothermal carbonization are different. Devolatization was found to be the main reason that increases the overall energy content in vapothermal carbonization, while formation of 2,5-HMF which gives a sharp peak at around 340°C in the DTG curves was suggested as the reason that led to the increase in energy content in hydrothermal carbonized materials. Other than that, this project also showed that lower water to biomass ratio led to higher energy densification. A comparison of torrefaction, hydrothermal and vapothermal carbonization processes also showed that hydrothermal and vapothermal carbonization are capable to suppress the deposition of tar on the reactor wall during the carbonization process 2016-10 Thesis NonPeerReviewed application/pdf en http://eprints.usm.my/45768/1/Hydrothermal%20And%20Vapothermal%20Carbonization%20Of%20Agricultural%20Wastes%20To%20Produce%20Solid%20Fuels.pdf Yeoh, Keat Hor (2016) Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels. Masters thesis, Universiti Sains Malaysia.
institution Universiti Sains Malaysia
building Hamzah Sendut Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Sains Malaysia
content_source USM Institutional Repository
url_provider http://eprints.usm.my/
language English
topic T Technology
TA349-359 Mechanics of engineering. Applied mechanics
spellingShingle T Technology
TA349-359 Mechanics of engineering. Applied mechanics
Yeoh, Keat Hor
Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels
description An investigation was carried out to study the effects of hydrothermal a carbonization on various agricultural wastes. A dual chamber reactor was designed to carry out the hydrothermal and vapothermal carbonization processes.From the experiments, the highest energy densification achieved was 1.280 invapothermal carbonization and 1.145 in hydrothermal carbonization for oil palm empty fruit bunches. Comparison of the hydrochar produced from both processes shows that vapothermal carbonized materials have higher heating values and higher fixed carbon contents as compared to those from hydrothermal carbonization process. Volatile matter of vapothermal carbonized materials have drops about 20% while their fixed carbon content are increased by 70-95% compare to the raw feedstock. With the supports of the SEM pictures and DTG curves of the products, it was concluded that the reaction mechanism during the hydrothermal and vapothermal carbonization are different. Devolatization was found to be the main reason that increases the overall energy content in vapothermal carbonization, while formation of 2,5-HMF which gives a sharp peak at around 340°C in the DTG curves was suggested as the reason that led to the increase in energy content in hydrothermal carbonized materials. Other than that, this project also showed that lower water to biomass ratio led to higher energy densification. A comparison of torrefaction, hydrothermal and vapothermal carbonization processes also showed that hydrothermal and vapothermal carbonization are capable to suppress the deposition of tar on the reactor wall during the carbonization process
format Thesis
author Yeoh, Keat Hor
author_facet Yeoh, Keat Hor
author_sort Yeoh, Keat Hor
title Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels
title_short Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels
title_full Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels
title_fullStr Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels
title_full_unstemmed Hydrothermal And Vapothermal Carbonization Of Agricultural Wastes To Produce Solid Fuels
title_sort hydrothermal and vapothermal carbonization of agricultural wastes to produce solid fuels
publishDate 2016
url http://eprints.usm.my/45768/1/Hydrothermal%20And%20Vapothermal%20Carbonization%20Of%20Agricultural%20Wastes%20To%20Produce%20Solid%20Fuels.pdf
http://eprints.usm.my/45768/
_version_ 1717094451499761664
score 13.211869

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