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Title: Production of Synthetic Natural Gas From Carbon Dioxide and Renewably Generated Hydrogen: A Techno-Economic Analysis of a Power-to-Gas Strategy

Abstract

Power-to-gas to energy systems are of increasing interest for low carbon fuels production and as a low-cost grid-balancing solution for renewables penetration. However, such gas generation systems are typically focused on hydrogen production, which has compatibility issues with the existing natural gas pipeline infrastructures. This study presents a power-to-synthetic natural gas (SNG) plant design and a techno-economic analysis of its performance for producing SNG by reacting renewably generated hydrogen from low-temperature electrolysis with captured carbon dioxide. The study presents a 'bulk' methanation process that is unique due to the high concentration of carbon oxides and hydrogen. Carbon dioxide, as the only carbon feedstock, has much different reaction characteristics than carbon monoxide. Thermodynamic and kinetic considerations of the methanation reaction are explored to design a system of multistaged reactors for the conversion of hydrogen and carbon dioxide to SNG. Heat recuperation from the methanation reaction is accomplished using organic Rankine cycle (ORC) units to generate electricity. The product SNG has a Wobbe index of 47.5?MJ/m3 and the overall plant efficiency (H2/CO2 to SNG) is shown to be 78.1% LHV (83.2% HHV). The nominal production cost for SNG is estimated at 132 $/MWh (38.8 $/MMBTU) with 3 $/kg hydrogen and a 65%more » capacity factor. At U.S. DOE target hydrogen production costs (2.2 $/kg), SNG cost is estimated to be as low as 97.6 $/MWh (28.6 $/MMBtu or 1.46 $/kgSNG).« less

Authors:
 [1];  [2];  [3]
  1. Department of Mechanical Engineering,Colorado School of Mines,1610 Illinois Street,Golden, CO 80401e-mail: becker@gmail.com
  2. National Renewable Energy Laboratory,15013 Denver West Parkway,Golden, CO 80401e-mail: Michael.penev@nrel.gov
  3. Department of Mechanical Engineering,Colorado School of Mines,1610 Illinois Street,Golden, CO 80401e-mail: rbraun@mines.edu
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1481101
Report Number(s):
NREL/JA-5400-72732
Journal ID: ISSN 0195-0738
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article
Journal Name:
Journal of Energy Resources Technology
Additional Journal Information:
Journal Volume: 141; Journal Issue: 2; Journal ID: ISSN 0195-0738
Publisher:
ASME
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; carbon dioxide; carbon monoxide; cost estimating; economic analysis; electric power generation; gases; hydrogenation; methanation; natural gas; natural gas pipelines; natural gasoline plants; rankine cycle

Citation Formats

Becker, William L., Penev, Michael, and Braun, Robert J. Production of Synthetic Natural Gas From Carbon Dioxide and Renewably Generated Hydrogen: A Techno-Economic Analysis of a Power-to-Gas Strategy. United States: N. p., 2018. Web. doi:10.1115/1.4041381.
Becker, William L., Penev, Michael, & Braun, Robert J. Production of Synthetic Natural Gas From Carbon Dioxide and Renewably Generated Hydrogen: A Techno-Economic Analysis of a Power-to-Gas Strategy. United States. doi:10.1115/1.4041381.
Becker, William L., Penev, Michael, and Braun, Robert J. Wed . "Production of Synthetic Natural Gas From Carbon Dioxide and Renewably Generated Hydrogen: A Techno-Economic Analysis of a Power-to-Gas Strategy". United States. doi:10.1115/1.4041381.
@article{osti_1481101,
title = {Production of Synthetic Natural Gas From Carbon Dioxide and Renewably Generated Hydrogen: A Techno-Economic Analysis of a Power-to-Gas Strategy},
author = {Becker, William L. and Penev, Michael and Braun, Robert J.},
abstractNote = {Power-to-gas to energy systems are of increasing interest for low carbon fuels production and as a low-cost grid-balancing solution for renewables penetration. However, such gas generation systems are typically focused on hydrogen production, which has compatibility issues with the existing natural gas pipeline infrastructures. This study presents a power-to-synthetic natural gas (SNG) plant design and a techno-economic analysis of its performance for producing SNG by reacting renewably generated hydrogen from low-temperature electrolysis with captured carbon dioxide. The study presents a 'bulk' methanation process that is unique due to the high concentration of carbon oxides and hydrogen. Carbon dioxide, as the only carbon feedstock, has much different reaction characteristics than carbon monoxide. Thermodynamic and kinetic considerations of the methanation reaction are explored to design a system of multistaged reactors for the conversion of hydrogen and carbon dioxide to SNG. Heat recuperation from the methanation reaction is accomplished using organic Rankine cycle (ORC) units to generate electricity. The product SNG has a Wobbe index of 47.5?MJ/m3 and the overall plant efficiency (H2/CO2 to SNG) is shown to be 78.1% LHV (83.2% HHV). The nominal production cost for SNG is estimated at 132 $/MWh (38.8 $/MMBTU) with 3 $/kg hydrogen and a 65% capacity factor. At U.S. DOE target hydrogen production costs (2.2 $/kg), SNG cost is estimated to be as low as 97.6 $/MWh (28.6 $/MMBtu or 1.46 $/kgSNG).},
doi = {10.1115/1.4041381},
journal = {Journal of Energy Resources Technology},
issn = {0195-0738},
number = 2,
volume = 141,
place = {United States},
year = {2018},
month = {9}
}

Works referenced in this record:

Optimizing investments in coupled offshore wind -electrolytic hydrogen storage systems in Denmark
journal, August 2017


Power-to-What? – Environmental assessment of energy storage systems
journal, January 2015

  • Sternberg, André; Bardow, André
  • Energy & Environmental Science, Vol. 8, Issue 2
  • DOI: 10.1039/C4EE03051F

Electrical energy storage systems: A comparative life cycle cost analysis
journal, February 2015


Production of Fischer–Tropsch liquid fuels from high temperature solid oxide co-electrolysis units
journal, November 2012


High temperature methanationSintering and structure sensitivity
journal, October 2007


Power-to-Gas: Storing Surplus Electrical Energy. A Design Study.
journal, January 2014


Renewable Energy Storage System Based on a Power-to-Gas Conversion Process
journal, November 2016


Hydrogen from renewable electricity: An international review of power-to-gas pilot plants for stationary applications
journal, February 2013


CO2 recycling by reaction with renewably-generated hydrogen
journal, January 2010

  • Hoekman, S. Kent; Broch, Amber; Robbins, Curtis
  • International Journal of Greenhouse Gas Control, Vol. 4, Issue 1
  • DOI: 10.1016/j.ijggc.2009.09.012

Synthetic natural gas via integrated high-temperature electrolysis and methanation: Part I—Energy performance
journal, June 2015


Improvement of three-phase methanation reactor performance for steady-state and transient operation
journal, April 2015


Effects of large-scale power to gas conversion on the power, gas and carbon sectors and their interactions
journal, April 2015


Synthetic natural gas via integrated high-temperature electrolysis and methanation: Part II—Economic analysis
journal, August 2015


Carbon capture and storage (CCS): the way forward
journal, January 2018

  • Bui, Mai; Adjiman, Claire S.; Bardow, André
  • Energy & Environmental Science, Vol. 11, Issue 5
  • DOI: 10.1039/C7EE02342A

Simulation of CO2 capture using MEA scrubbing: a flowsheet decomposition method
journal, February 2005


Hydrogen or batteries for grid storage? A net energy analysis
journal, January 2015

  • Pellow, Matthew A.; Emmott, Christopher J. M.; Barnhart, Charles J.
  • Energy & Environmental Science, Vol. 8, Issue 7
  • DOI: 10.1039/C4EE04041D

Large-scale electricity storage utilizing reversible solid oxide cells combined with underground storage of CO 2 and CH 4
journal, January 2015

  • Jensen, S. H.; Graves, C.; Mogensen, M.
  • Energy & Environmental Science, Vol. 8, Issue 8
  • DOI: 10.1039/C5EE01485A

Renewable Power-to-Gas: A technological and economic review
journal, January 2016


Cost and performance of fossil fuel power plants with CO2 capture and storage
journal, September 2007