科研之友
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摘要
The increased knowledge and awareness of the impacts of climate change on global environment and its linkage to the greenhouse gases emissions (GHG) has resulted in an expansion of a set of European policies during the past decades. Since the energy sector is one of the major contributors of GHG emissions, the need to mitigate the climate change impacts has led to a diversification of the world's energy mix, promoted by an increased demand for renewable energy sources. The Portuguese government considers the use of biomass for pellet production as a key factor to accomplish the national goals established in the energy strategy for renewable energy sources. However, few studies have evaluated the potential impact of this type of bioenergy on air quality. In this context, a case study was selected to estimate the atmospheric emissions of the pellet energy supply chain in Portugal. A comparison of both pellet and forest biomass residue energy supply chain in terms of atmospheric emissions was performed. Results show that the pellet production is the process with the largest contribution to CO2e and SOx emissions (with a contribution higher than 90%); the domestic combustion is mainly responsible for total suspended particle and CO emissions; NOx is a result of both production and combustion processes, and non-methane volatile organic compound is a result of the forest exploitation. Compared with the forest biomass residue energy supply chain, the pellet energy supply chain produces higher atmospheric emissions.
- 出版日期2018-3
