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A polygeneration process for heat, power and DME production by integrating gasification with CHP plant: Modelling and simulation study
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Energy Processes. Mälardalen University, Sweden.ORCID iD: 0000-0003-0300-0762
2017 (English)In: Proceedings of the 9th International Conference on Applied Energy, Elsevier, 2017, Vol. 142, p. 1749-1758Conference paper, Published paper (Refereed)
Abstract [en]

Biofuels are a good substitute for the transport sector petroleum fuels to minimize carbon footprint and greenhouse gases emissions. Di-Methyl Ether (DME) is one such alternative with properties similar to liquefied petroleum gas but with lower SOx, NOx, and particulate emissions. In this work, a polygeneration process, integrating an existing combined heat and power (CHP) plant with biomass gasification to synthesize DME, is proposed and modelled. Process integration is based on a hypothesis that the CHP plant provides the necessary heat to run the co-located gasification plant for DME synthesis and the waste heat from the gasification process is recovered and transferred to the CHP plant. The feed for gasification is taken as refuse derived fuel (RDF) instead of conventional wood derived biomass. The process integration leads to higher overall combined efficiency (up to 71%) which is greater than stand-alone efficiencies (up to 63%) but lower than stand-alone CHP plant efficiency (73.2%). The further technical evaluation shows that the efficiency of the polygeneration process is depends heavily on the gasifier capacity integrated with the existing CHP plant and also on the conversion route selected for DME synthesis i.e. recycling of unconverted syngas to the DME reactor or transferring it to the boiler of the CHP plant. The simulation results also indicate that once-through conversion yields less DME than recycling, but at the same time, once-through conversion affects the district heat and electric power production of the CHP plant lesser than by using the recycling route.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 142, p. 1749-1758
Series
Energy Procedia, ISSN 1876-6102 ; 142
Keywords [en]
Aspen Plus, biofuels, modelling, simulation, waste-to-energy
National Category
Energy Systems
Identifiers
URN: urn:nbn:se:kth:diva-224406DOI: 10.1016/j.egypro.2017.12.559ISI: 000452901601139Scopus ID: 2-s2.0-85041530043OAI: oai:DiVA.org:kth-224406DiVA, id: diva2:1191150
Conference
9th International Conference on Applied Energy, ICAE 2017, Cardiff, United Kingdom, 21 August 2017 through 24 August 2017
Funder
Knowledge Foundation, 20120276
Note

QC 20180316

Available from: 2018-03-16 Created: 2018-03-16 Last updated: 2019-01-07Bibliographically approved

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  • apa
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