Assessment of the Emissions and Energy Impacts of Biomass and Biogas Use in California

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Assessment of the Emissions and Energy Impacts of Biomass and Biogas Use in California Assessment of the Emissions and Energy Impacts of Biomass and Biogas Use in California Provided to the California Air Resources Board by Marc Carreras-Sospedra Michael MacKinnon Professor Donald Dabdub University of California, Irvine In collaboration with Robert Williams California Biomass Collaborative February 27, 2015 Agreement #11-307 Contact Information: Professor Donald Dabdub Email: [email protected] Phone: 949-824-6126 Marc Carreras-Sospedra Email: [email protected] Phone: 949-824-5772 ACKNOWLEDGEMENT Direct funding of this work was provided by the California Air Resources Board through Contract #11-307. DISCLAIMER The statements and conclusions in this report are those of the contractor and not necessarily those of the California Air Resources Board. The mention of commercial products, their source, or their use in connection with material reported here in is not to be construed as actual or implied endorsement of such products ii Table of Contents List of Figures v List of Tables ix Abstract 1 Acronyms 2 Executive Summary 4 1 Introduction 19 2 Biomass Resources 19 3 Uses of Biomass 28 3.1 Biopower 28 3.1.1 Feedstock 28 3.1.2 Electricity Conversion Technologies 30 3.1.3 Emissions Impacts 42 3.1.4 Biopower Conclusions 48 3.2 Biomass Derived Transportation Fuels 49 3.2.1 Ethanol 53 3.2.2 Compressed Natural Gas 59 4 Biomass Scenarios 63 4.1 Description of Biomass Scenarios 63 4.2 Emissions from Biomass Scenarios 69 4.2.1 Conversion of Solid Biomass 69 4.2.2 Conversion of Biogas 74 4.2.3 Emissions Displacement from Biomass Use 79 4.2.4 Summary of Emissions from Biomass Scenarios 80 5 Air Quality Modeling 89 5.1 Modeling Framework 89 5.2 Air Quality Modeling Performance 90 5.3 Air Quality Impacts of Biomass Scenarios 96 5.3.1 General Air Pollution Dynamics 96 5.3.2 Air Quality Impacts 98 iii 6 Conclusion 110 7 References 113 iv List of Figures Figure 1: Solid residue potential for biopower production in 2020 and capacity and location of existing facilities in California. Data on facilities from CBC, 2013; data on potential from Williams et al., 2008. 21 Figure 2: Landfill gas potential for biopower production in 2020 and capacity and location of existing facilities in California. Data on facilities from CBC, 2013; data on potential from Williams et al., 2008. 23 Figure 3: Capacity and location of existing biopower facilities in California in wastewater treatment plants (WWTP). Data on facilities from CBC, 2013. 24 Figure 4: Capacity of existing biopower facilities in California using biogas from animal manure. Data on facilities from CBC, 2013. 25 Figure 5: Capacity and location of existing biogas facilities in California from anaerobic digestion of food residue (CBC, 2013). 26 Figure 6: Capacity and location of existing biofuel facilities in California (CBC, 2013) 27 Figure 7: Allocation of biomass resources in California (Williams et al., 2007) 29 Figure 8: Different biomass conversion technologies and the associated potential products (Brusstar et al. 2005) 31 Figure 9: Typical electrical conversion efficiencies for different types of gasification technologies (Bridgwater, 2006) 35 Figure 10: Schematic representations of different types of gasifiers (West et al., 2009) 36 Figure 11: Schematic of an updraft gasifier, taken from Basu, 2006 36 Figure 12: Schematic of a fast pyrolysis process (Bridgwater, 2006) 39 Figure 13: Illustration of the various sets of biological reactions that occur in anaerobic digestion (U.S. EPA, 2010) 40 Figure 14: Rate of anaerobic digestion vs. digester temperature (U.S EPA, 2010a) 41 Figure 15: Life cycle GHG emissions for several different scenarios of electricity generation (Bain et al., 2003) 44 Figure 16: Life cycle pollutant emissions for several different scenarios of electricity generation (Bain et al., 2003) 45 Figure 17: Emissions performance for several biopower technologies (Thornley, 2008) 46 v Figure 18: Emissions performance for several biopower technologies (Le et al., 2011) 47 Figure 19: Federal RFS2 volume requirements mandated by 2022. Adapted from Greene, 2011 51 Figure 20: Estimated gasoline-equivalent costs of alternative liquid fuels in 2007 dollars. Note: BTL=biomass-to-liquid; CBTL=coal-and-biomass-to- liquid; CTL= coal-to-liquid fuel Source: NRC 2009 53 Figure 21: Percentage of lifecycle GHG reductions for corn ethanol compared to motor gasoline for plants utilizing various technologies and fuels. Source: Kaliyan et al., 2011 56 Figure 22: Schematic of RSNG production from biomass through gasification and methanation (Zwart et al. 2006). This example includes a stage for tar removal using a proprietary technology called OLGA. 61 Figure 23: SNG production efficiencies for different gasification technologies (From Zwart et al., 2006) 62 Figure 24: Summary of power generation capacity from biomass scenarios with current biomass technology estimated for the year 2020 65 Figure 25: Summary of emissions from biomass in scenarios with current biomass technology (group A) 82 Figure 26: Net emissions from biomass in scenarios with current biomass technology (group A) 83 Figure 27: Comparison of emissions from biomass in scenarios with maximum biomass potential with current technology (group A-4) and with technology upgrades for efficiency and emissions (group B) 84 Figure 28: Net emissions from biomass in scenarios with maximum biomass potential with current technology (group A-4) and with technology upgrades for efficiency and emissions (group B) 85 Figure 29: Comparison of emissions from biomass in scenarios with maximum biomass potential using current technology for biopower (group A) and scenarios with a shift end use from electricity to fuel (group C-1, C-2, C-3 and C-4) 86 Figure 30: Comparison of emissions from biomass in scenarios with maximum biomass potential using current technology for biopower (group A) and scenarios with a shift end use from electricity to fuel (group C-1, C-2, C-3 and C-4) 87 vi Figure 31: Ambient air concentrations for July 13, 2005: (a) 8-hour average ozone, (b) 24-hour average PM2.5. 91 Figure 32: Modeled and observed hourly ozone concentrations for July 13, 2005 at selected locations 92 Figure 33: Modeled and observed 24-hour average PM2.5 concentrations for July 13, 2005 at selected locations 93 Figure 34: Modeled pollutant concentrations for December 7, 2005: (a) 8-hour average ozone, (b) 24-hour average PM2.5. 94 Figure 35: Modeled and observed hourly ozone concentrations for December 7, 2005 at selected locations 95 Figure 36: Modeled and observed 24-hour average PM2.5 concentrations for December 7, 2005 at selected locations 96 Figure 37: Locations of emissions from biopower production for the Maximum technical potential for biopower production with current technology (group A-4). Top: NOX emissions from biopower facilities. Bottom: NOX emissions from forest residue collection 99 Figure 38: Changes in peak ozone concentrations due to biomass scenarios in a summer episode with respect to the baseline case: (a) No Biomass Case, (b) Maximum biopower production with current technology (group A-4), (c) Maximum biopower production with enhanced technology (group B), (d) Maximum production of CNG from biomass for vehicle consumption (group C-1). 101 Figure 39: Changes in 24-hour average PM2.5 concentrations due to biomass scenarios in a summer episode: (a) No Biomass Case, (b) Maximum biopower production with current technology (group A-4), (c) Maximum biopower production with enhanced technology (group B), (d) Maximum production of CNG from biomass (group C-1). 102 Figure 40: Changes in peak ozone concentrations due to biomass scenarios in a winter episode: (a) No Biomass Case, (b) Maximum biopower production with current technology (group A-4), (c) Maximum biopower production with enhanced technology (group B), (d) Maximum production of CNG from biomass (group C-1). 105 Figure 41: Changes in 24-hour average PM2.5 concentrations due to biomass scenarios in a winter episode: (a) No Biomass Case, (b) Maximum biopower production with current technology (group A-4), (c) Maximum biopower production with enhanced technology (group B), (d) Maximum production of CNG from biomass (group C-4). 107 vii viii List of Tables Table 1: Technology distribution for biomass solid residue biopower installations (CBC, 2013). 22 Table 2: Technology distribution for landfill gas biopower installations (CBC, 2013) 23 Table 3: Technology distribution in biopower installations in wastewater treatment plants (CBC, 2013) 24 Table 4: Summary of the advantages and disadvantages of various direct combustion technologies (Van Loo, 2008) 33 Table 5: Summary of challenges and advantages of the various gasification technologies (compiled from (Bridgwater, 2006; Basu, 2010; Wang et al., 2008) 37 Table 6: Typical product yields obtained from different modes of pyrolysis of dry wood (Bridgwater, 2006) 39 Table 7: Summary of Fuels and Vehicles Used in Each Scenario to Meet the 2020 Standard for Gasoline and Fuels that Substitute for Gasoline (LCFS ARB staff report, CARB, 2009a) 52 Table 8: Summary of Fuels and Vehicles Used in Each Scenario to Meet the 2020 Standard for Gasoline and Fuels that Substitute for Diesel Fuel (from LCFS ARB staff report, CARB, 2009a) 52 Table 9: Current and future estimates of biomass feedstock and corresponding volumetric ethanol availability for use as a transportation fuel 55 Table 10: Estimates of LCA GHG Emissions for Various Ethanol Production Pathways with and without Estimates of Land Use Change Impacts. Source(s) CARB 2009a & Searchinger,
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