Biomass waste co-firing with coal applied to the Sines Thermal Power Plant in Portugal

Nunes, Leonel J. R.; Matias, João C. O.; Catalão, João P.S.

doi:10.1016/j.fuel.2014.04.088

Cited by 13 publications

(9 citation statements)

References 36 publications

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“…The increase in research in this area, as well as the development of standards and technical documents, highlight the political, social, and economic relevance of solid biofuels [38,39]. Intensive use of wood-based fuels in co-combustion processes has put enormous pressure on forests [40,41]. To alleviate this pressure and simultaneously increase the use of biomass in co-combustion processes, thereby reducing CO 2 emissions, it is necessary to increase the use of alternative residual fuels, namely agricultural waste [29,42].…”

Section: State-of-the-artmentioning

confidence: 99%

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Nunes

Loureiro²,

Sá³

et al. 2020

Clean Technol.

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Agroforestry waste stores a considerable amount of energy that can be used. Portugal has great potential to produce bioenergy. The waste generated during agricultural production and forestry operation processes can be used for energy generation, and it can be used either in the form in which it is collected, or it can be processed using thermochemical conversion technologies, such as torrefaction. This work aimed to characterize the properties of a set of residues from agroforestry activities, namely rice husk, almond husk, kiwi pruning, vine pruning, olive pomace, and pine woodchips. To characterize the different materials, both as-collected and after being subjected to a torrefaction process at 300 °C, thermogravimetric analyses were carried out to determine the moisture content, ash content, fixed carbon content, and the content of volatile substances; elementary analyses were performed to determine the levels of carbon, nitrogen, hydrogen, and oxygen, and the high and low heating values were determined. With these assumptions, it was observed that each form of residual biomass had different characteristics, which are important to know when adapting to conversion technology, and they also had different degrees of efficiency, that is, the amount of energy generated and potentially used when analyzing all factors.

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Section: State-of-the-artmentioning

confidence: 99%

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Nunes

Loureiro²,

Sá³

et al. 2020

Clean Technol.

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“…A reliance on subsidies requires ongoing political support [2]. EU member countries such as Germany and Portugal have noted cost-related impediments to forest biomass use [2,17].…”

Section: Introductionmentioning

confidence: 99%

Renewable Energy from Forest Residues—How Greenhouse Gas Emission Offsets Can Make Fossil Fuel Substitution More Attractive

Yemshanov

McKenney

Hope

et al. 2018

Forests

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Burning forest biomass from renewable sources has been suggested as a viable strategy to help offset greenhouse gas (GHG) emissions in the energy generation sector. Energy facilities can, in principle, be retrofitted to produce a portion of their energy from biomass. However, supply uncertainties affect costs, and are an important impediment to widespread and sustained adoption of this strategy. In this paper, we describe a general approach to assess the cost of offsetting GHG emissions at co-generation facilities by replacing two common fossil fuels, coal and natural gas, with forest harvest residue biomass for heat and electricity production. We apply the approach to a Canadian case study that identifies the price of GHG offsets that could make the use of forest residue biomass feedstock attractive. Biomass supply costs were based on a geographical assessment of industrial harvest operations in Canadian forests, biomass extraction and transportation costs, and included representation of basic ecological sustainability and technical accessibility constraints. Sensitivity analyses suggest that biomass extraction costs have the largest impact on the costs of GHG emission offsets, followed by fossil fuel prices. In the context of other evaluations of mitigation strategies in the energy generation sector, such as afforestation or industrial carbon capture, this analysis suggests that the substitution of fossil fuels by forest residue biomass could be a viable and reasonably substantive short-term alternative under appropriate GHG emission pricing schemes.

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“…Although these materials are already an alternative to coal, they cannot fully replace coal on a global scale due to several factors; notably, the differences in physical and chemical properties, such as hydrophilic properties opposed to the hydrophobicity of the coal, and the approximately 8 GJ/t difference in their heating values [30][31][32]. These two significant factors result, for the former, in the need for large investments by the end-user for the storage of biomass pellets to prevent them from degrading while waiting for use, and for the latter, the difference in heating values results in the mixing of the two fuels during co-firing process, creating too much turbulence in the flame, causing difficulties with maintaining efficient heat exchange [30,33].…”

Section: Current Situation Of Energy Productionmentioning

confidence: 99%

Biomass Torrefaction as a Key Driver for the Sustainable Development and Decarbonization of Energy Production

Nunes

Matias

2020

Sustainability

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Climate change is a reality that affects the daily lives of people around the world, with a set of effects that are systematically felt. If there is still discussion about the real cause behind these phenomena, with differing opinions defending the anthropic origin or the origin in terrestrial cycles of geological scale, it seems to be unanimously attributed to the increased concentration of greenhouse gases—particularly to CO2. That is, whatever the source of CO2, it is commonly accepted that this is the cause of the acceleration of the climate change process, and the occurrence of extreme climate phenomena. The use of energy from renewable sources, such as solar or wind, can contribute to the replacement of energy generated from fossil sources. However, these forms of energy are dependent on uncontrollable climatic factors and are, therefore, dependent on the existence of alternatives that, when in reserve, can be activated at any time as soon as the power grid requests their activation. Thus, biomass emerges as an alternative capable of providing this answer, although it also has numerous disadvantages. Torrefaction may be the technology that corrects these drawbacks and allows for the successful use of biomass in the replacement the coal used in power generation, contributing significantly to the reduction of CO2 emissions. In addition to this possibility, it is necessary to introduce forest management models that effectively make use of all material flows generated during forestry operations, creating value-added chains, with a view toward a circular economy and resource sustainability.

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Biomass waste co-firing with coal applied to the Sines Thermal Power Plant in Portugal

Cited by 13 publications

References 36 publications

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Waste Recovery through Thermochemical Conversion Technologies: A Case Study with Several Portuguese Agroforestry By-Products

Renewable Energy from Forest Residues—How Greenhouse Gas Emission Offsets Can Make Fossil Fuel Substitution More Attractive

Biomass Torrefaction as a Key Driver for the Sustainable Development and Decarbonization of Energy Production

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