Hossain, Abul Kalam, Sharma, Vikas, Serrano, Clara, Krishnasamy, Anand and Ganesh, Duraisamy (2024). Production of biofuel from AD digestate waste and their combustion characteristics in a low-speed diesel engine. Renewable energy, 222 ,
Abstract
Anaerobic digestion biogas plants generate large amounts of digestate that cannot always be valorised as fertilizer. This study proposes an alternative use through pyrolysis of the digestate for the production of liquid fuels for compression ignition engines. The digestate pyrolysis oil (DPO) and two types of biodiesel were produced and mixed with different alcohols. A total of five blends of DPO, biodiesel and alcohol were prepared and characterized, showing that their acidity and viscosity were higher than for pure diesel, and their heating value was lower. Blends containing 60 % biodiesel, 20 % DPO, and 20 % butanol were then tested in an engine, showing that the maximum in-cylinder pressure and heat release rate were 4.6 % and 3 % lower, respectively, compared to diesel, and the engine thermal efficiency at full load was 6–8% lower. The nitric oxide and smoke emissions were 7 % and 40 % lower, respectively, but the carbon dioxide emissions were 7–10 % higher than with diesel. The blends showed retarded start of combustion by 1.5° crank angle, which delays the ignition by about 6.4 %. This study concludes that blends can be used as a fuel for agriculture and marine diesel engines, although their viscosity should be reduced by improving the pyrolysis conditions.
Publication DOI: | https://doi.org/10.1016/j.renene.2023.119884 |
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Divisions: | College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design College of Engineering & Physical Sciences College of Engineering & Physical Sciences > Energy and Bioproducts Research Institute (EBRI) |
Funding Information: | The study was made possible through the support of the UKIERI project, identified by Grant Number DST-UKIERI 18-19-04, titled “Waste to Energy - Low Temperature Combustion of Sustainable Green Fuels”. |
Additional Information: | This is an open access article distributed under the terms of the Creative Commons Attribution License CC BY [https://creativecommons.org/licenses/by/4.0/], which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Uncontrolled Keywords: | Biodiesel,Combustion,Digestate,Emission,Engine,Pyrolysis |
Publication ISSN: | 1879-0682 |
Last Modified: | 06 Aug 2024 09:59 |
Date Deposited: | 03 Jan 2024 13:33 |
Full Text Link: | |
Related URLs: |
https://www.sci ... 960148123017998
(Publisher URL) http://www.scop ... tnerID=8YFLogxK (Scopus URL) |
PURE Output Type: | Article |
Published Date: | 2024-02 |
Published Online Date: | 2023-12-22 |
Accepted Date: | 2023-12-21 |
Authors: |
Hossain, Abul Kalam
(![]() Sharma, Vikas Serrano, Clara ( ![]() Krishnasamy, Anand Ganesh, Duraisamy |