TITLE:
A cost-optimal scenario of CO2 sequestration in a carbon-constrained world through to 2050
AUTHORS:
Takayuki Takeshita
KEYWORDS:
CO2 Sequestration; Simulation; Optimization; Global Energy System Model
JOURNAL NAME:
Natural Science,
Vol.5 No.2A,
February
27,
2013
ABSTRACT: In this paper, a
regionally disaggregated global energy system model with a detailed treatment
of the whole chain of CO2 capture and storage (CCS) is used to
derive the cost-optimal global pattern of CO2 sequestration in regional
detail over the period 2010-2050 under the target of halving global
energy-related CO2 emissions in 2050 compared to the 2005 level. The
major conclusions are the following. First, enhanced coalbed methane recovery
will become a key early opportunity for CO2 sequestration, so coalrich
regions such as the US, China, and India will play a leading role in global CO2 sequestration. Enhanced oil recovery will also have a participation in global
CO2 sequestration from the initial stage of CCS deployment, which
may be applied mainly in China, southeastern Asia, and West Africa in 2030 and
mainly in the Middle East in 2050. Second, CO2 sequestration will be
carried out in an increasing number of world regions over time. In particular,
CCS will be deployed extensively in today’s developing countries. Third, an
increasing amount of the captured CO2 will be stored in aquifers in
many parts of the world due to their abundant and widespread availability and
their low cost. It is shown that the share of aquifers in global CO2 sequestration reaches 82.0% in 2050.