Ecoefficiency of Thermal Insulation Sandwich Panels Based On Fly Ash Modified with Colloidal Mesoporous Silica

Document identifier: oai:DiVA.org:ltu-77121
Access full text here:10.1021/acssuschemeng.9b05726
Keyword: Engineering and Technology, Industrial Biotechnology, Bioprocess Technology, Teknik och teknologier, Industriell bioteknik, Bioprocessteknik, Ecoefficiency, Thermal insulation sandwich panels, Colloidal mesoporous silica, Municipal solid waste incineration fly ash, Life cycle assessment, Life cycle costing, Lignin−epoxy resin, Biokemisk processteknik, Biochemical Process Engineering
Publication year: 2019
Relevant Sustainable Development Goals (SDGs):
SDG 3 Good health and wellbeing
The SDG label(s) above have been assigned by OSDG.ai

Abstract:

The current practice of landfilling fly ash generated by waste incineration is nonsustainable, so alternative ways of using this material are needed. Silanization effectively immobilizes the heavy metal contaminants in the incineration fly ash and enables its circular utilization because silanized fly ash (SFA) has market value as a low-cost filler for polymer composites. This study examines the ecoefficiency of a thermal insulation panel that consists of a polyurethane (PU) foam core sandwiched between two epoxy composite skins prepared by reinforcing glass fibers (GF) and SFA in epoxy resin. The ecoefficiency of such panels was evaluated by comparing their life cycle environmental externality costs (LCEE) to their life cycle costs (LCC). The LCEE was calculated by monetizing the panels’ environmental impacts, which were quantified by performing a life cycle assessment (LCA). The results revealed that the ecoefficiency of the composite panels is positive (47%) and superior to that of market incumbent alternatives with PU foam or rockwool cores and steel skins. The two market incumbents have negative ecoefficiencies, primarily due to their high LCEE. The environmental performance of the panel with SFA–GF epoxy composite skins can be further improved by using lignin-based epoxy resin or thermoplastic polypropylene as the polymer matrix of composite skins. Overall, application as a filler in fabricating polymer composite skins of sandwich panels is an upcycling pathway of SFA that combines circular economy prospects with sustainability benefits.

Authors

K. Shanmugam

Department of Chemistry, Umeå University, Umeå, Sweden
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S. Jansson

Department of Chemistry, Umeå University, Umeå, Sweden
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V. Gadhamshetty

Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, SD, United States. Surface Engineering Research Center, South Dakota School of Mines and Technology, Rapid City, SD, United States
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Leonidas Matsakas

Luleå tekniska universitet; Kemiteknik
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Ulrika Rova

Luleå tekniska universitet; Kemiteknik
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M. Tysklind

Department of Chemistry, Umeå University, Umeå, Sweden
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Paul Christakopoulos

Luleå tekniska universitet; Kemiteknik
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V.K.K. Upadhyayula

Department of Chemistry, Umeå University, Umeå, Sweden
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