potential strategies for distributed sustainable ammonia ......potential strategies for distributed...
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Potential Strategies for Distributed Sustainable Ammonia Production
Alon McCormick
University of Minnesota
NH3 Fuel Conference 2015
1
Ed Cussler, Prodromos Daoutidis, Paul Dauenhauer, Lanny Schmidt, Roger Ruan, Doug Tiffany, Steve Kelley, Mike Reese
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1. Agriculture, wind power, and ammonia 2. Zero emissions ammonia pilot plant
- Reese & coworkers
3. Ammonia synthesis enhanced by absorption - Cussler, McCormick, & coworkers
4. Ammonia synthesis via non-thermal plasma - Ruan & coworkers
5. Modeling, economic, and public policy issues - Tiffany, Kelley, Daoutidis, & coworkers
2
Potential Strategies for Distributed Sustainable Ammonia Production
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Nitrogen Fertilizer in Corn Production
• 13 million metric tons annually, 80% goes to agriculture† • Corn is most anhydrous ammonia intensive crop • Dominant source of embedded energy in corn production • Largest source of GHG emissions in corn production
Source: www.countrysidefarmsimplements.com Source: U of M Extension, John M Shutske, “Using Anhydrous Ammonia Safely on the Farm.. FO-2326-C , April 2002 3
†USDA (2011)
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Ammonia Plants are very large…
IFC Ammonia & Urea plant in Wever, Iowa - 4 million tons/year capacity Retrieved from http://www.2b1stconsulting.com/ Sep 2015 4
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Example of Modern Large-Scale CH4-Based Process
5 http://beta.kbr.com/Technologies/Process-Technologies/PURIFIERplus-Ammonia-Process/ Sept 2015
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6 © 2015, Regents of the University of Minnesota. All rights reserved
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Stranded Wind Resources
National Renewable Energy Laboratory, United States Department of Energy. Wind Resource Map (2014). http://www.nrel.gov/gis/wind.html
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Ammonia Demand
National Agricultural Statistics Service, United States Department of Agriculture. Planted Corn Acreage by County (2014). http://www.nass.usda.gov/Charts_and_Maps/Crops_County/#cr
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Sustainable NH3: Oklahoma vs Minnesota
Costs Oklahoma Production Minnesota Production
Pipeline tariff - OK to MN $40 0
Trucking—Mankato to Morris, MN $22 0
Total Transportation Costs $62 / ton NH3 0
Pounds of CO2 Produced
Natural Gas in Production 3700 0
Electricity in Production 460 0
Pipeline Energy 50 0
Trucking 130 0
Total CO2 Produced 4400 lbs CO2 / ton NH3 0
9 Source: Tiffany 2014 - MN Corn Research and Promotion Council Report
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2. Zero-Emission Ammonia Pilot Plant Mike Reese Cory Marquart Eric Buchanan Joel Tallaksen
West Central Research & Outreach Center, Morris
University of Minnesota Ammonia plant design and construction supported by:
College of Food, Agriculture, and Natural Resource Sciences, UMN Institute for Renewable Energy and the Environment, UMN
State of Minnesota Minnesota Corn Research and Promotion Council
Hydrogen facility: partial support from Environment and Natural Resources Trust Fund, State of Minnesota
10 Photo Credit: http://wcroc.cfans.umn.edu/ © 2015, Regents of the University of Minnesota. All rights reserved
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Making Ammonia with Wind Energy:
11
• Vestas turbine installed March 2005 • Produces 5.4 M kWh/yr • Provides campus with over 50% of
electricity needs • NH3 pilot plant construction 2012 • Pilot plant consumes 10% of turbine
electricity production
Pilot plant: Sebesta Blomberg, Seppro, AGEC © 2015, Regents of the University of Minnesota. All rights reserved
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N2 from Air, H2 from Water
Cussler, E. L. Diffusion Mass Transfer in Fluid Systems. (Cambridge University Press).
Source: http://protononsite.com/products/hydrogen-generator/
• Nitrogen via membrane or PSA separation • Hydrogen via electrolysis of water
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Morris, MN Ammonia Pilot Plant
13
Scaled down conventional Haber-Bosch process, 25 ton/yr capacity
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Pilot Plant Process Flow
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3. Absorbent Enhanced Ammonia Synthesis
Ed Cussler Alon McCormick
Mahdi Malmali Kevin Wagner
Lanny Schmidt, Paul Dauenhauer Heath Himstedt Mark Huberty
Chemical Engineering & Materials Science University of Minnesota – Twin Cities
15 Photo Credit: http://twin-cities.umn.edu/ © 2015, Regents of the University of Minnesota. All rights reserved
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Batch Reaction with Absorbent
2. Reaction and Absorption
1. Feed the reactor
3. NH3 Desorption
Catalyst (Clariant AmoMax-10)
16
N2
H2 Absorbent (MgCl2)
Reaction
NH3
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MgCl2 Application Researchers Institute Description Year Reference
Chemical Heat Pump
Saito et al.
University of Tokyo
Absorption of ammonia into alkaline earth metal halides 1994 Jpn. Kokai Tokkyo
Koho JP 06136357
Low pressure ammonia synthesis & storage
Aika et al.
Tokyo Institute of Technology
Absorption isotherms of halide mixtures and phases
2002 Chem. Let. 31, 798-799
2004 Procedure. Bull.
Chem. Soc. Jpn. 77, 123-131.
2004 Ind. Eng. Chem. Res. 43, 7484-7491
Ammonia Storage Aristov et al.
Boreskov Institute of
Catalysis
Alkaline earth metal confined in alumina 2005 React. Kinet. Catal.
Lett. 1, 183-188
Hydrogen Storage as Ammonia
Christensen, Vegge,
Norskov, Johannessen
et al.
Technical University of
Denmark
Opportunities for hydrogen storage 2005 J. Mater. Chem 15,
4106-4108
Absorption/desorption difficulties 2006 J Am. Chem. Soc. 128, 16-17
DFT studies for crystal structure 2010 Energy Environ. Sci. 3, 448-456
Desorption and characterization
Owen-Jones, Royce, David,
et al Oxford Frontiers in characterization and
understanding 2013 -14
Chem Phys, 427, 38-43
2014 NH3FC
Distributed/facilitated Ammonia production
Cussler, McCormick
et al.
University of Minnesota
Absorption of ammonia at Haber process conditions 2012 AIChEJ 58, 3526-3552
Absorbent enhanced ammonia production 2015 AIChEJ 61, 1364-1371
Ammonia Storage Fuel Cell
Van Hassel et al.
United Technologies
Alkaline earth metal confined in activated carbon 2015 Sep. Purif. Technol.
142, 215-226 17
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Ammonia Absorption in MgCl2 can be Fast
Cussler et al. AIChE J. 58, (2012) 3526–3532. Absorption only, no catalyst
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MgCl2 can be loaded with NH3 over many cycles
Cussler et al. AIChE J. 58, (2012) 3526–3532.
© 2015, Regents of the University of Minnesota. All rights reserved Absorption only, no catalyst
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MgCl2 Adsorbent
Reactor
Catalyst
Compressed N2 H2 NH3
N2 H2
Combined Catalysis and Absorption
20
Cussler, et al. AIChE J. 61, (2015) 1364-1371.
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Conversion Increases with MgCl2
21
Cussler, et al. AIChE J. 61, (2015) 1364-1371.
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Conversion Increases with MgCl2
22 Cussler et al. AIChE J. 61, (2015) 1364-1371.
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Revealing desorption demonstration Phase I: warm up Phase (II): first four moles are desorbed Phase (II to III): transition phase Phase (III): fifth mole of ammonia desorbs Phase (IV): sixth mole of ammonia desorbs
Johannessen et al., Chem. Eng. Sci. 61 (2006) 2618-2625
T1: absorbent bed wall temperature T5: absorbent bed center temperature
Complex Ab/De-sorption
Mg(NH3)6Cl2⇌ Mg(NH3)2Cl2 + 4 NH3 Mg(NH3)2Cl2⇌ Mg(NH3)Cl2 + NH3 Mg(NH3)Cl2⇌ MgCl2 + NH3
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Absorbent Structure Changes as Ammonia is Absorbed
Christensen et al. J. Am. Chem. Soc., 2008, 130, 8660.
24
Calculated structures found by Danish group for MgCl2(NH3)x.
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4. Non-Thermal Plasma Catalytic NH3 Production
Roger Ruan
Yun Li Paul Chen
Bioproducts & Biosystems Engineering University of Minnesota – Twin Cities
25 Photo Credit: http://twin-cities.umn.edu/
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Non-Thermal Plasma (NTP) Assisted Catalysis
• NTP - energized ions and highly reactive radicals made in non pressurized gas with electrical discharge
• Catalyst with Promoter: triple bond of dinitrogen weakened by passing electron into the anti-bonding orbital of N2 through the d-orbital of Ruthenium
HV Power
Electrode
Electrode
Plasma
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Potential Advantages of NTP
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Plasma Assisted Catalysis
28
(Zeolites)
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5. Modeling, Economic, & Policy Analysis
Doug Tiffany* Steve Kelley†
Prodromos Daoutidis‡
*Applied Economics †Humphrey Institute Public Affairs
‡Chemical Engineering & Materials Science University of Minnesota – Twin Cities
29 Photo Credit: http://twin-cities.umn.edu/
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Tiffany – Current Pilot Plant Energy Consumption
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Tiffany – Effect of Scale Estimated plant capital cost per ton of capacity of ammonia –
including electrolysis, excluding wind turbine
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Tiffany & Kelley – Effect of Policy?
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Daoutidis - Supply Chain Formulation
Purchase from conventional plants Candidate renewable sites
Distribution and demand
+
Nonlinear program formulation for optimal supply chain + =
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Daoutidis - Renewable Plant Favorable in Base Case
140K t/y capacity built in Dexter, MN 34
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Conclusions: Distributed Sustainable Ammonia
1. Cuts CO2 emissions • Pilot plant offers benchmark study
2. New technologies can promise lower capital • But must be robust and efficient
3. Distributed renewable ammonia possible • new technology • scale, economic scenario • location and policy
Acknowledgment for support of research results shown in this presentation: • University of Minnesota Institute for Renewable Energy and the Environment • MNDrive program, University of Minnesota VP for Research • Minnesota Corn Growers Association
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