Site items in: Content by Author Serina Ahlgren

Life-cycle greenhouse gas and energy balance of community-scale wind powered ammonia production

As well as being an innovative energy source, ammonia is a crucial component of most nitrogen fertilizers. Since the production of ammonia is very energy intensive and currently completely based on fossil energy, there is a considerable interest in developing renewably produced ammonia for use in agriculture and other sectors. This work presents a life cycle assessment (cradle-to-gate) of greenhouse gas (GHG) emissions and primary energy use for ammonia produced at community-scale using renewable wind generated electricity. Two different regions were studied: Minnesota (US) and Sweden. The results show that ammonia produced with wind-generated electricity has significantly lower fossil energy…

Production of Ammonia and Nitrogen Fertilizers based on Biomass - Research Efforts in Sweden

The Swedish University of Agricultural Sciences have been conducting research on production of ammonia and nitrogen fertilizers based on bioenergy since 2006, in the last years in co-operation with Lund University and University of Minnesota. The research has so far been theoretical — studying the techno-economics and the potential environmental impacts. Several possible pathways for ammonia and ammonium nitrate fertilizer production have been explored, e.g. gasification of woody biomass, reforming of biogas from anaerobic digestion, integration in biomass CHP plants. A selection of results from the past years research can be presented: Techno-Economic Assessment of Non-Fossil Ammonia Production P. Tunå,…