https://www.mdu.se/

mdu.sePublications
Planned maintenance
A system upgrade is planned for 10/12-2024, at 12:00-13:00. During this time DiVA will be unavailable.
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
SMALL SCALE ENERGY CONVERSION OF PLASTIC WASTE: Identification of gasification process parameters through modelling in Aspen Plus
Mälardalen University, School of Business, Society and Engineering.
Mälardalen University, School of Business, Society and Engineering.
2020 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The present work investigates further development of a small-scale fixed bed batch operating gasification pilot system intended to be used as a waste-to-energy process to reduce littering of PET-bottles on Pemba Island in Tanzania. By developing a simplified gasification model and identifying the most important parameters to obtain a syngas with a lower heating value suitable for combustion and maximizing the overall efficiency and cold gas efficiency. By a literature study the most important parameters were identified along with how the methodology for developing the model and selection of modelling software. The model was developed as an equilibrium-based model in Aspen Plus representing the pilot system, the most important parameters was identified as equivalence ratio and temperature. Multiple scenarios, regarding sensitivity analysis of these parameters was conducted to determine how the outcome of the process was affected. The model was validated against a reference study and was proven to be accurate with small variations. High content of methane and carbon monoxide promoted the highest lower heating value which was at an equivalence ratio of 0.25 and a temperature of 450°C, which also indicated the highest overall efficiency. Increasing the temperature favoured the carbon monoxide content and the cold gas efficiency but indicated a decrease in lower heating value and overall efficiency. It was concluded that the optimal operational conditions were at an equivalence ratio at 0.25 and a temperature at 450°C. At these conditions, the formation of by-products from the gasification is higher than at higher equivalence ratios and temperature which needs to be further investigated through experimental work. It was also concluded that the system could benefit to operate in a semi- batch configuration with a higher equivalence ratio to utilize the excess heat from the process.

Place, publisher, year, edition, pages
2020.
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:mdh:diva-49162OAI: oai:DiVA.org:mdh-49162DiVA, id: diva2:1448124
Subject / course
Energy Engineering
Supervisors
Examiners
Available from: 2020-07-03 Created: 2020-06-26 Last updated: 2020-07-03Bibliographically approved

Open Access in DiVA

fulltext(2052 kB)2558 downloads
File information
File name FULLTEXT01.pdfFile size 2052 kBChecksum SHA-512
c7f085fcf86b06b9a87036f917a8168ea9117c0d8d9376f7e8d4050c5e5cef498e24fcb351c08d77ac4b164953f55e6896a468e443c5d25614ea166656249d38
Type fulltextMimetype application/pdf

By organisation
School of Business, Society and Engineering
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 2559 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 1286 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf