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Publisher DOI: 10.3390/en14154548
Title: Fuel improvement measures for particulate matter emission reduction during corn cob combustion
Language: English
Authors: Dragutinovic, Natasa  
Höfer, Isabel 
Kaltschmitt, Martin 
Keywords: biomass; corn cob; combustion; additives; kaolin; particulate matter
Issue Date: 27-Jul-2021
Publisher: Multidisciplinary Digital Publishing Institute
Source: Energies 14 (15): 4548 (2021)
Abstract (english): 
Fuel-related measures and modernization of small-scale combustion units has become the focus of attention in the renewable heat generation sector, as a means to promote local biomass utilization and fuel-flexibility while meeting strict environmental legislative requirements. With the aim to mitigate total particulate matter emissions and ash-associated problems characteristic of crop residue combustion, (1) corn cob pellets (with and without kaolin and binder) as well as (2) fuel blends with wood pellets were combusted in a pellet oven under full load. Results show that additivation or fuel blending (e.g., 50 wt. % wood and 50 wt. % corn cob pellets) reduce total particulate and CO-emissions by 48 to 60 wt. % and 64 to 89 wt. %, respectively, in comparison to baseline emissions from non-additivized corn cob pellets. Kaolin prevented sintering of corn cob ash. However, considerable grate ash entrainment was observed. TPM consists of a “primary network” - polyhedral and spherical particles approximately 1 μm in diameter (mainly KCl), and a “secondary network” built on top of the primary network, consisting of square-prism-shaped particles of approximately 200 nm in diameter. KCl and K₂SO₄ are main compounds in particles from corn cob and wood pellet combustion, respectively. Effective measures demonstrated within this study should be complemented with low-cost coarse ash removal systems.
DOI: 10.15480/882.3713
ISSN: 1996-1073
Journal: Energies 
Other Identifiers: doi: 10.3390/en14154548
Institute: Umwelttechnik und Energiewirtschaft V-9 
Document Type: Article
Project: Mobilisation of Corn Cobs as Energy Source and Improvement of Heat Generators Concerning Environmental Impacts 
Publikationsfonds 2021 
Funded by: Deutsche Bundesstiftung Umwelt 
Freie und Hansestadt Hamburg (FHH) 
More Funding information: This research was funded by Deutsche Bundesstiftung Umwelt (DBU), grant number 33897/01 und 33897/02, and Scholarship of the Hanseatic City of Hamburg. Publishing of this paper supported by Funding Programme “Open Access Publishing” of Hamburg University of Technology (TUHH).
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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