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Publications (5 of 5) Show all publications
Vicente, E., Vicente, A., Evtyugina, M., Carvalho, R., Tarelho, L., Paniagua, S., . . . Alves, C. (2019). Emissions from residential pellet combustion of an invasive acacia species. Renewable energy, 140, 319-329
Open this publication in new window or tab >>Emissions from residential pellet combustion of an invasive acacia species
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2019 (English)In: Renewable energy, ISSN 0960-1481, E-ISSN 1879-0682, Vol. 140, p. 319-329Article in journal (Refereed) Published
Abstract [en]

Currently, different types of raw materials are under investigation to fulfil the demand for pellet-based renewable energy. The aim of this study was to experimentally quantify and characterise the gaseous and particulate matter (PM10) emissions from the combustion of a pelletised invasive species growing in the Portuguese coastal areas. The combustion of acacia pellets in a stove used for domestic heating led to a noticeable production of environmentally relevant contaminants, such as carbon monoxide (CO, 2468 ± 485 mg MJ−1), sulphur dioxide (SO2, 222 ± 115 mg MJ−1) and nitrogen oxides (NOx, 478 ± 87 mg MJ−1). Besides gaseous pollutant emissions, substantial particle emissions (118 ± 14 mg MJ−1) were also generated. Particles consisted mostly of inorganic matter, mainly alkaline metals, sulphur and chlorine. About 25%wt. of the PM10 emitted had carbonaceous nature. The chromatographically resolved organic compounds were dominated by anhydrosugars, especially levoglucosan (284 μg g−1 PM10), and several types of phenolic compounds. Retene (8.77 μg g−1 PM10) was the chief compound among polyaromatic hydrocarbons.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Acacia, Gaseous emissions, PM10, OC/EC, organic markers, pellet stove
National Category
Energy Systems
Research subject
environmental science
Identifiers
urn:nbn:se:umu:diva-157432 (URN)10.1016/j.renene.2019.03.057 (DOI)000466250700027 ()2-s2.0-85063341865 (Scopus ID)
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-09-02Bibliographically approved
Carvalho, R., Lindgren, R., García-Lopez, N., Nyberg, G. & Boman, C. (2018). Household Bioenergy Transitions with Alternative Biomass Feedstocks and Technologies: An Integrated System to Mitigate Environmental Risks in Western Kenya. In: École Polytechnique Fédérale de Lausanne, UNESCO (Ed.), Household Bioenergy Transitions with Alternative Biomass Feedstocks and Technologies: An Integrated System to Mitigate Environmental Risks in Western Kenya: . Paper presented at UNESCO Chaired Conferenced on Technologies for Development 2018, Tech4Dev 2018. Lausanne
Open this publication in new window or tab >>Household Bioenergy Transitions with Alternative Biomass Feedstocks and Technologies: An Integrated System to Mitigate Environmental Risks in Western Kenya
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2018 (English)In: Household Bioenergy Transitions with Alternative Biomass Feedstocks and Technologies: An Integrated System to Mitigate Environmental Risks in Western Kenya / [ed] École Polytechnique Fédérale de Lausanne, UNESCO, Lausanne, 2018Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

In Kenya, over 50% of the total primary energy consumption is from traditional solid-fuel cooking, being this a major cause of deforestation and household air pollution (HAP). Western Kenya has an agricultural biofuel feedstock of over 1.9 million Mt, which could be processed to supply cookstoves with crop-residue pellets and improved wood fallows. The sociotechnical viability of two novel bioenergy value chains were analysed using the Long-Range Energy Alternatives Planning system. Three scenarios of transition to efficient cookstoves and decentralized biofuel and electricity production systems were tested. In the “Optimal scenario”, the current feedstock in the Kisumu and Siaya counties could satisfy over 80% of the cooking energy demand by 2030. Here, the net greenhouse gas emissions from charcoal production and HAP could be reduced by 87% to 12.6 thousand Mt CO2e. Further work should integrate socioeconomic indicators reflecting additional local/regional stakeholders´ collaboration channels (cost-effective) to support the bioenergy transitions. 

Place, publisher, year, edition, pages
Lausanne: , 2018
Keywords
Agroforestry, Industrial Residues, Pellets, Advanced Cookstoves, Gasification Technologies.
National Category
Energy Systems Forest Science Agricultural Science, Forestry and Fisheries
Research subject
biology, Environmental Science; biology, Environmental Science
Identifiers
urn:nbn:se:umu:diva-148316 (URN)
Conference
UNESCO Chaired Conferenced on Technologies for Development 2018, Tech4Dev 2018
Projects
Sustainable Biomass Utilization in Sub-Saharan Africa for an Improved Environment and Health
Available from: 2018-06-03 Created: 2018-06-03 Last updated: 2018-06-09
Carter, E., Lam, N., Chafe, Z., Carvalho, R., Shan, M., Ackerly, J. & Lancey, F. (2018). Household energy transitions to address air pollution exposure, health, and climate burdens associated with solid fuel burning. In: Household energy transitions to address air pollution exposure, health, and climate burdens associated with solid fuel burning: . Paper presented at The 15th Conference of the International Society of Indoor Air Quality & Climate (ISIAQ). Philadelphia
Open this publication in new window or tab >>Household energy transitions to address air pollution exposure, health, and climate burdens associated with solid fuel burning
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2018 (English)In: Household energy transitions to address air pollution exposure, health, and climate burdens associated with solid fuel burning, Philadelphia, 2018Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Residential space heating and cooking are critical household energy service needs worldwide. Household transitions to clean-burning fuels at population scales are needed that do not contribute to poor indoor and outdoor air quality and the potential associated exposure, health, and climate burdens. We propose to discuss and debate research, implementation needs, and advances related to use of solid fuel for meeting residential energy needs with an express focus on residential heating demand, which has been less studied than residential cooking.We aim to identify knowledge gaps in the field of household energy systems in resource-constrained communities, set research priorities to address these gaps, and highlight opportunities for interdisciplinary and transnational learning and collaboration. 

Place, publisher, year, edition, pages
Philadelphia: , 2018
National Category
Energy Systems Environmental Management
Identifiers
urn:nbn:se:umu:diva-148322 (URN)
Conference
The 15th Conference of the International Society of Indoor Air Quality & Climate (ISIAQ)
Available from: 2018-06-03 Created: 2018-06-03 Last updated: 2018-06-09
Vicente, E. D., Vicente, A., Evtyugina, M., Carvalho, R., Tarelho, L. A. C., Oduber, F. I. & Alves, C. (2018). Particulate and gaseous emissions from charcoal combustion in barbecue grills. Fuel processing technology, 176, 296-306
Open this publication in new window or tab >>Particulate and gaseous emissions from charcoal combustion in barbecue grills
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2018 (English)In: Fuel processing technology, ISSN 0378-3820, E-ISSN 1873-7188, Vol. 176, p. 296-306Article in journal (Refereed) Published
Abstract [en]

The use of charcoal for cooking and heating can be a major source of air pollution and lead to a wide range of health outcomes. The aim of this study was to experimentally quantify and characterise the gaseous and particulate matter (PM2.5) emissions from charcoal combustion in a typical brick barbecue grill. The gaseous emission factors were 219 ± 44.8 g kg−1 for carbon monoxide (CO), 3.01 ± 0.698 g kg−1 for nitrogen oxides (NOxexpressed as NO2), and 4.33 ± 1.53 gC kg−1 for total organic carbon (TOC). Particle emissions (7.38 ± 0.353 g kg−1 of dry charcoal burned) were of the same order of magnitude as those from traditional residential wood burning appliances. About 50% of the PM2.5 emitted had a carbonaceous nature while water soluble ions accounted, on average, for 17% of the particulate mass. Alkanes (C11–C16 and C23), hopanes, steranes and alkyl-PAHs accounted for small mass fractions of PM2.5. Phenolic compounds and saccharides represented the major particle-bond organic constituents. The high proportion of either resin acids or syringyl and vanillyl compounds is consistent with emissions from charred coniferous wood. The ratios between anhydrosugars for charcoal are much lower than the values reported for lignite combustion, but overlap those from other biomass burning sources.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Barbecue grill, Charcoal, Emissions, Chemical composition, PM2.5, Organic markers
National Category
Energy Systems
Research subject
biology, Environmental Science
Identifiers
urn:nbn:se:umu:diva-147244 (URN)10.1016/j.fuproc.2018.03.004 (DOI)
Available from: 2018-04-29 Created: 2018-04-29 Last updated: 2018-06-09Bibliographically approved
Carvalho, R., Vicente, E., Tarelho, L. & Jensen, O. M. (2018). Wood stove combustion air retrofits: a low cost way to increase energy savings in dwellings. Energy and Buildings, 164, 140-152
Open this publication in new window or tab >>Wood stove combustion air retrofits: a low cost way to increase energy savings in dwellings
2018 (English)In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 164, p. 140-152Article in journal (Refereed) Published
Abstract [en]

In Europe, wood-fired stoves remain as major renewable household heating and emission sources. This study focused on improving the performance of a wood stove (natural draft) traditionally used in Portugal by the adoption of alternative combustion air retrofits. Additionally, the performance of a new pellet stove (forced-air) was determined to investigate the highest achievable goal for solid-fuel stoves. In the wood stove, an outer chimney component was installed around the existing chimney to allow the vertical admission of outdoor air that was preheated before entering the combustion chamber. This measure increased the thermal efficiency of the wood stove from 62% to up to 79%. Another component was used to administrate secondary air to the wood stove reducing the carbon monoxide emissions by 39% to 2808 mg Nm−3. The two retrofits enhanced a more stable heat release from the wood stove, which reached a thermal efficiency 11% lower than that achieved by the pellet stove. This research suggests that retrofitting stoves with chimney components that allow the admission of combustion air can substantially increase energy savings in dwellings. Further efforts should focus on improving the interplay between the outdoor air and secondary air admission to achieve higher emission reductions at low-cost.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Wood stoves, chimney components, combustion air admission, energy performance, thermal efficiency, emission reductions
National Category
Energy Systems Environmental Management
Research subject
biology, Environmental Science
Identifiers
urn:nbn:se:umu:diva-148315 (URN)10.1016/j.enbuild.2018.01.002 (DOI)000428492700013 ()
Projects
AIRUSE – Testing and development of air quality mitigation measures in Southern Europe, LIFE 11 ENV/ES/000584
Available from: 2018-06-03 Created: 2018-06-03 Last updated: 2018-11-23Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6521-4160

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