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Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor

Sewage sludge, the solid waste produced from the municipal wastewater treatment plant has created environmental problem due to continuous increasing number o f sewage sludge production. Thus, finding solutions for sewage sludge treatment and discharge are essential, to address the issues. Nowadays,...

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Main Author: Rozuki, Nur Fatin Aimilia
Format: Thesis
Language:English
Published: 2019
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TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/96468/1/NurFatinAimiliaMFChe2019.pdf
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spelling my.utm.964682022-07-24T10:50:53Z http://eprints.utm.my/id/eprint/96468/ Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor Rozuki, Nur Fatin Aimilia TP Chemical technology Sewage sludge, the solid waste produced from the municipal wastewater treatment plant has created environmental problem due to continuous increasing number o f sewage sludge production. Thus, finding solutions for sewage sludge treatment and discharge are essential, to address the issues. Nowadays, the utilization o f sewage sludge as solid fuel for energy recovery is one o f the convenient solutions to improve waste management system whilst the gasification is one o f the preferable thermochemical conversion process to convert the sewage sludge to higher yield o f combustible light gases due to its simple and efficient process. Therefore, this study focuses on the conversion o f sewage sludge into energy via updraft gasification process and to investigate the performance o f the fixed bed gasifier (L = 1.549 m, D = 0.114 m) for maximum production o f hydrogen and total syngas yield (H2, CH4, CO, CO2 and N2). The reactor temperature was ranged between 600 to 900°C with equivalence ratio (ER) o f 0.10 to 0.20, with different gasifying agents i.e. air and steam. The produced syngas at different operating conditions was collected using gas sample bag and analysed using residual gas analyzer to identify the syngas yield. Results showed that the maximum hydrogen yield o f 3.18 % was obtained at 800°C with ER o f 0.20 while optimum total syngas yield was obtained at 63.43 % for 800°C and ER o f 0.15. For comparison, the steam gasification was also was carried out and it was found that 4.40 % and 70.40 % was observed for maximum hydrogen yield and optimum total syngas yield, respectively. Further, the effect o f gasifying agent on total syngas yield was found to be higher for air gasification at reactor temperature o f 600 and 700°C while at 800 and 900°C, the total syngas yield was found to be higher for steam gasification. It can be said that steam gasification gives more H2 yield (> 2.4 %) than air gasification. In conclusion, energy recovery from sewage sludge can be utilized by using gasification process, and thus, minimizing the environmental pollution. In addition, the produced syngas from these processes has a potential to be used for heat and power generation application. 2019 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/96468/1/NurFatinAimiliaMFChe2019.pdf Rozuki, Nur Fatin Aimilia (2019) Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor. Masters thesis, Universiti Teknologi Malaysia. http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131587
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TP Chemical technology
spellingShingle TP Chemical technology
Rozuki, Nur Fatin Aimilia
Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
description Sewage sludge, the solid waste produced from the municipal wastewater treatment plant has created environmental problem due to continuous increasing number o f sewage sludge production. Thus, finding solutions for sewage sludge treatment and discharge are essential, to address the issues. Nowadays, the utilization o f sewage sludge as solid fuel for energy recovery is one o f the convenient solutions to improve waste management system whilst the gasification is one o f the preferable thermochemical conversion process to convert the sewage sludge to higher yield o f combustible light gases due to its simple and efficient process. Therefore, this study focuses on the conversion o f sewage sludge into energy via updraft gasification process and to investigate the performance o f the fixed bed gasifier (L = 1.549 m, D = 0.114 m) for maximum production o f hydrogen and total syngas yield (H2, CH4, CO, CO2 and N2). The reactor temperature was ranged between 600 to 900°C with equivalence ratio (ER) o f 0.10 to 0.20, with different gasifying agents i.e. air and steam. The produced syngas at different operating conditions was collected using gas sample bag and analysed using residual gas analyzer to identify the syngas yield. Results showed that the maximum hydrogen yield o f 3.18 % was obtained at 800°C with ER o f 0.20 while optimum total syngas yield was obtained at 63.43 % for 800°C and ER o f 0.15. For comparison, the steam gasification was also was carried out and it was found that 4.40 % and 70.40 % was observed for maximum hydrogen yield and optimum total syngas yield, respectively. Further, the effect o f gasifying agent on total syngas yield was found to be higher for air gasification at reactor temperature o f 600 and 700°C while at 800 and 900°C, the total syngas yield was found to be higher for steam gasification. It can be said that steam gasification gives more H2 yield (> 2.4 %) than air gasification. In conclusion, energy recovery from sewage sludge can be utilized by using gasification process, and thus, minimizing the environmental pollution. In addition, the produced syngas from these processes has a potential to be used for heat and power generation application.
format Thesis
author Rozuki, Nur Fatin Aimilia
author_facet Rozuki, Nur Fatin Aimilia
author_sort Rozuki, Nur Fatin Aimilia
title Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
title_short Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
title_full Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
title_fullStr Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
title_full_unstemmed Hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
title_sort hydrogen production from sewage sludge via updraft gasification process in a bench a scale fixed bed reactor
publishDate 2019
url http://eprints.utm.my/id/eprint/96468/1/NurFatinAimiliaMFChe2019.pdf
http://eprints.utm.my/id/eprint/96468/
http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:131587
_version_ 1739828084192837632
score 13.211869

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