Brian Keaveny Climate and Energy Analyst2014 CMAS Conference NESCAUM October 29, 2014.

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Presentation transcript:

Brian Keaveny Climate and Energy Analyst2014 CMAS Conference NESCAUM October 29, 2014

Presentation Outline 1. NESCAUM 2. Example Project 3. Model Used 4. Scenarios and Results 5. Conclusions 2

About NESCAUM Northeast States for Coordinated Air Use Management Non-profit association of eight state air quality agencies 3

Project Overview Defined Mitigation Scenarios Develop Emissions Trajectories Mapped Technologies to SCC Codes & Developed Emissions Growth Factors Processed in SMOKE CMAQ Modeling 4 Georgia Institute of Technology Objective

MARKAL EPA U.S. Nine-Region Database (EPAUS9r) Model Parameters Outputs Image Source: 5 Model Overview

Mitigation Scenarios Six mitigation scenarios Two low carbon transportation scenarios Two high biomass potential scenarios Two carbon tax scenarios Carbon Tax 1: $20/ton of CO2 in 2015, 4% annual growth Carbon Tax 2: $50/ton of CO2 in 2020, 10% annual growth 6

Results 7 CO2 SO2 NOx Interesting trends: NOx increase from industrial sector NOx increase from power sector

Results: Trends NOx increase in industrial sector Biomass CHP 8 NOx * Energy is in Petajoules

Results: Trends 9 NOx increase from power sector Changes in generation Widespread CCS retrofits of existing coal units Existing NOx controls used less NOx

Results: Trends 10 Regional differences CAIR regions Non-CAIR regions

Conclusions Takeaways: GHG mitigation measures may affected CAP emissions in surprising and undesirable ways. Such detailed emission trajectory modeling frameworks can be quite sensitive to modeling assumptions. Next Steps: Emission trajectories for this and other scenarios were carried through SMOKE and CMAQ 11

Brian Keaveny

13 Supplemental Slides

14 Change in NOx Emissions from Power Sector in Non-CAIR Regions, Relative to Reference

15

* Electricity Generation is in Petajoules For CT-2

Reference Case Policy Assumptions Clean Air Act Title IV SO 2 and NO x power sector limits EISA 2007 Renewable Fuel Standard (RFS) Fuel Mandate (36 bgy by 2022, 21 bgy advanced biofuel / 15 bgy corn based) Clean Air Interstate Rule (CAIR) Mercury and Air Toxics Standards (MATS) Aggregated state Renewable Portfolio Standards (RPS) standards by region Federal Corporate Average Fuel Economy (CAFE) standards as modeled in the Annual Energy Outlook (AEO) 2012 Tier 2 light duty vehicle emission standards Heavy duty fuel and engine rules No regional carbon policies at this time No efficiency or demand response programs

Mitigation Scenarios Modeled Carbon Tax Scenarios: CT1 – carbon tax started in 2015 at ($20/ton) of CO2, and grew out to 2050 at an average annual growth rate of 4%. CT2 – carbon tax started in 2020 at ($50/ton) of CO2, and grew out to 2050 at an average annual growth rate of 10%. Low Carbon Transportation Scenarios: TR1 – 70% reduction in transportation CO 2 emissions relative to 2005 by TR2 – 70% reduction in transportation CO 2 emissions relative to 2005 by CO 2, SO 2, and NO X emission rates from coal power plants set to natural gas combined cycle power plants. High Biomass Potential Scenarios: BE1 – all available biomass in the U.S. put to full use, including agricultural residues, energy crops, mill residues, and urban wood waste. BE2 – full compliance with federal renewable fuel standard (RFS) requirements.