@inproceedings{22cf0837358549199a175baac6d1f04f,
title = "Combining geothermal potential and direct air capture for negative emission power generation in California",
abstract = "Since the Industrial Revolution, CO2emissions have grown exponentially, leading to atmospheric CO2accumulation and concomitant global warming. The IPCC special report (2018) estimates that the atmospheric temperature should not rise more than 2° if we want to avoid major consequences associated with climate change. This can be achieved by reducing CO2emissions through capture and sequestration, either at the emission point source or from ambient air. Direct air capture (DAC) technology answers the latter challenge but is to date hindered by high thermal requirements which effectively limit the net removal of atmospheric CO2. One solution may exist in geothermal energy, which represents a large, low-carbon source of heat. This work outlines the potential of integrating DAC plants with geothermal power plants to optimize net CO2removal through use of a low-carbon heat source and minimize cost through exploitation of existing infrastructure. Full integration of DAC plants with all existing geothermal power plants in the contiguous U.S. could capture 12.8 MtCO2/yr. Other options have been considered and include combining DAC plants with direct use geothermal or building new infrastructure near geothermal springs and wells. Following capture, reliable storage of CO2is vital to climate change mitigation. Several types of geological formations are suitable for longterm CO2storage in the pore space of subsurface reservoirs. The most mature technology to date involves sequestration in saline aquifers and depleted oil and gas reservoirs. This work will focus on California due to its leadership in strong environmental policy and abundance of high temperature opportunities. Several works have assessed reservoirs for CO2storage in California (e.g. USGS, 2013), through which minimum cost pathways may be defined for CO2sequestration. The result of this analysis is a cradle-to-gate economic analysis of DAC/geothermal plus storage options within the state of California.",
keywords = "California, Direct air capture, Geothermal energy, Geothermal waste heat use, Negative emissions",
author = "H{\'e}l{\`e}ne Pilorg{\'e} and Peter Psarras and Jiajun He and Wilcox, {Jennifer L.}",
note = "Publisher Copyright: {\textcopyright} 2019 Geothermal Resources Council. All rights reserved.; Geothermal Resources Council 2019 Annual Meeting - Geothermal: Green Energy for the Long Run, GRC 2019 ; Conference date: 15-09-2019 Through 18-09-2019",
year = "2019",
language = "English (US)",
series = "Transactions - Geothermal Resources Council",
publisher = "Geothermal Resources Council",
pages = "462--468",
booktitle = "Geothermal",
address = "United States",
}