Consequential Life Cycle Assessment of Nitrogen Fertilisers Based on Biomass - a Swedish perspective

The production of mineral nitrogen represents a large fossil energy input in Swedish agriculture. However, mineral nitrogen can be produced in the Haber-Bosch synthesis, with input from renewable energy. This could lower the dependency on fossil energy and the emissions of greenhouse gases in agricultural production. The aim of this study was to investigate the land use, energy use and greenhouse gas emissions from the production of ammonium nitrate based on biomass, using consequential life cycle assessment methodology. Three scenarios are studied. In one scenario the Haber-Bosch synthesis is integrated in an existing forest residue fired combined heat and power plant. In another two scenarios thermochemical gasification of biomass in combination with Haber- Bosch synthesis is studied, using either straw or short rotation coppice (Salix) as raw material. The results showed that the greenhouse gas emissions and use of fossil energy can be significantly lowered. The size of emission reductions compared to using fossil fuels as raw material is dependent on choice of data, but also choice of functional unit and if e.g. indirect land use change is included. The study also showed that using green nitrogen in rapeseed production substantially can lower the carbon footprint. Further, we argue that production of nitrogen based on renewables should be a high-priority activity, as nitrogen is one of the pillars for a secure food and bioenergy supply for a growing world population.

[1]  K. Sumathy,et al.  AN OVERVIEW OF HYDROGEN PRODUCTION FROM BIOMASS , 2006 .

[2]  Brian Vad Mathiesen,et al.  Uncertainties related to the identification of the marginal energy technology in consequential life cycle assessments , 2009 .

[3]  Pål Börjesson,et al.  Indirekt förändrad markanvändning och biodrivmedel - en kunskapsöversikt , 2011 .

[4]  M. Margni,et al.  Considering time in LCA: dynamic LCA and its application to global warming impact assessments. , 2010, Environmental science & technology.

[5]  Pål Börjesson,et al.  Agricultural crop-based biofuels – resource efficiency and environmental performance including direct land use changes , 2011 .

[6]  Sven Bernesson,et al.  LIFE CYCLE ASSESSMENT OF RAPESEED OIL, RAPE METHYL ESTER AND ETHANOL AS FUELS - A COMPARISON BETWEEN LARGE- AND SMALL- SCALE PRODUCTION , 2004 .

[7]  Sven Bernesson,et al.  Ammonium nitrate fertiliser production based on biomass - environmental effects from a life cycle perspective. , 2008, Bioresource technology.

[8]  S. Ahlgren.  Crop Production without Fossil Fuel . Production Systems for Tractor Fuel and Mineral Nitrogen Based on Biomass , 2009 .

[9]  Francesco Cherubini,et al.  GHG balances of bioenergy systems – Overview of key steps in the production chain and methodological concerns , 2010 .

[10]  Sven Bernesson,et al.  A limited LCA comparing large- and small-scale production of rape methyl ester (RME) under Swedish conditions , 2004 .

[11]  A. Soler,et al.  Fertiliser characterisation: Major, trace and rare earth elements , 2005 .

[12]  V. Smil.  Enriching the Earth: Fritz Haber, Carl Bosch, and the Transformation of World Food Production , 2000 .

[13]  D. Nilsson.  Transportation work and energy requirements for haulage of straw fuels. A comparison between the plants at Såtenäs and Svalöv. , 1995 .

[14]  Michael Dubey.  TECHNICAL AND ECONOMIC FEASIBILITY OF MAKING FERTILIZER FROM WIND ENERGY, WATER, AND AIR , 1978 .

[15]  Bruno Mary,et al.  Modeling consequences of straw residues export on soil organic carbon , 2008 .

[16]  Serina Ahlgren,et al.  Crop production without fossil fuel , 2009 .

[17]  Life cycle assessment of rapeseed oil, rape methyl ester and ethanol as fuels , 2004 .

[18]  Francesco Cherubini,et al.  Energy- and greenhouse gas-based LCA of biofuel and bioenergy systems: Key issues, ranges and recommendations , 2009 .

[19]  Sven Bernesson,et al.  A limited LCA comparing large- and small-scale production of ethanol for heavy engines under Swedish conditions , 2006 .

[20]  E. Robert,et al.  Indirect Land Use Change From Increased Biofuels Demand - Comparison of Models and Results for Marginal Biofuels Production from Different Feedstocks , 2010 .

[21]  Copernicus Copernicus,et al.  Future prospects for production of methanol and hydrogen from biomass , 2001 .

[22]  W. Winiwarter,et al.  How a century of ammonia synthesis changed the world , 2008 .

[23]  Sven Bernesson,et al.  Nitrogen fertiliser production based on biogas - energy input, environmental impact and land use. , 2010, Bioresource technology.

[24]  Göran Finnveden,et al.  A world with CO2 caps , 2008 .

[25]  Vincent Mahieu,et al.  Well-to-wheels analysis of future automotive fuels and powertrains in the european context , 2004 .

[26]  Mubashir Virk.  Importance of Swedish Cogeneration Plants for the Domestic Energy System and the North European Power Exchange , 2011 .

[27]  Eva-Lotta Lindholm,et al.  Energy Use and Environmental Impact of Roundwood and Forest Fuel Production in Sweden , 2010 .

[28]  T. Grundt,et al.  Hydrogen by water electrolysis as basis for small scale ammonia production. A comparison with hydrocarbon based technologies , 1982 .

[29]  Marie Kimming,et al.  Energy and Greenhouse Gas Balance of Decentralized Energy Supply Systems based on Organic Agricultural Biomass , 2011 .

[30]  R. Newman.  Promotion of the use of energy from renewable sources , 2014 .

[31]  D. Nilsson.  Energy, exergy and emergy analysis of using straw as fuel in district heating plants , 1997 .

[32]  Dongke Zhang,et al.  Recent progress in alkaline water electrolysis for hydrogen production and applications , 2010 .

[33]  Brian Hunter,et al.  United Nations Industrial Development Organization (UNIDO) , 2018, International Organization.

[34]  R. Overend.  The average haul distance and transportation work factors for biomass delivered to a central plant , 1982 .

[35]  Henrikke Baumann,et al.  The hitch hiker's guide to LCA : an orientation in life cycle assessment methodology and application , 2004 .

[36]  Ralph P. Overend,et al.  Biomass and renewable fuels , 2001 .

[37]  R. Streatfeild,et al.  Enriching the Earth: Fritz Haber, Carl Bosch, and the Transformation of World Food Production , 2002 .