5th WCSET-2016 at Vietnam
Plenary Session:
Title:
Development of Gas-Flux Monitor to Measure Soil CO2
Emission from Ground Surface into Atmosphere at CO2
Geological Storage Site
Authors:
Kyuro Sasaki, Yuichi Sugai, Salmawati, Wataru Kawasaki
Abstract:
Today, the reduction of greenhouse gases such as CO2 is
emerging as a key issue that must be tackled through
global cooperation. At the 2015 United Nations Climate
Change Conference (COP21) held in Paris, France, in
December 2015, 190 participant countries discussed and
agreed upon a framework for global warming
countermeasures from 2020 onward. Carbon Capture
Utilization & Storage (CCUS) and Carbon Capture &
Geological Storage (CCS) systems combine separation and
capture of CO2 from large-scale CO2 emission sources,
such as coal-fired power plants, with their
sequestration and storage underground where those
carbons were originally stored for a long period of
time. In order to carry large scale of CCUS and CCS
projects, the safety against gas leakage from the
storage to surface is the critical issue for local
communities around the sites. However, the criterion for
the leakage CO2 gas, that flux could be over natural
soil CO2 gas-flux, has not been regulated for a decision
making to stop injecting CO2. In this study, the
gas-flux monitor and measurement methodology have been
developed to measure soil CO2 emission from ground
surface into atmosphere. The automatic operating system
to control gas chamber ventilation was developed. At the
Ito Natural Analogue Test (INAS), Kyushu University, a
series of soil CO2 gas-flux monitoring was carried out
using with the monitor for three months. Sensitivities
of the environmental factor such as soil surface
temperature and precipitation for soil CO2 gas flux were
investigated. Furthermore, a criterion or a threshold
value has been presented for a warning alarm on CO2 gas
leakage at CCS sites based on those long-term
measurement results.
Keywords: CO2 Emission, CCS, CCUS,
Soil Gas-Flux, Monitor, Leakage Monitoring
Pages:
004-004