1. Encontro CIÊNCIA ’17
José Ricardo Lemes de Almeida, Edmilson Moutinho dos Santos, Manoel João Lemos de Sousa
PERSPECTIVES FOR CARBON CAPTURE, UTILIZATION AND STORAGE IN COAL SEAMS FROM PARANÁ BASIN BRAZIL
3. CCUS into Coal Seams
1. The Problem
Storage due to adsorption process
CO2 is incorporated to organic matter content surface (chemical sorption) and to coal’s cleat systems and microporosity (physical sorption)
Higher chemical affinity to CO2 than CH4, resulting in replacement and possible production of methane
Figure 1. Primary energy consumption worldwide, by source, from 1990 to (IEA, 2016). $
Increasing energy demand
Higher CO2 emissions
Figure 4. Schematic representation of the carbon storage process in coal layers associated with advanced methane recovery (CO2-ECBM) (Bachu et al., 2009).
Figure 2. Evolution of CO2 emissions from the burning of fossil fuels (IEA, 2014).
2. CCUS – Carbon Capture, Utilization and Storage
Fundamental criteria for storage site selection and safety
Potential for effective reduction of CO2 produced at stationary sources (up to 25% of total emitted CO2)
Geographic and socio-economic revitalization of depleted or abandoned coal mines
Possible additional recovery of hydrocarbons, mainly methane
CONTAINMENT
(trapping mechanisms and caprock integrity)
CAPACITY
(reservoir dimension and porosity)
INJECTIVITY
(reservoir permeability)
Capture
Transport
Storage
of compressed CO2 from
emission source
to storage site
of supercritical CO2 into Coal seams Oil/gas reservoirs
Deep saline aquifers
of CO2 from flue gas at emission source
Figure 5. Schematic representation of the cleat system of coal and its matrix (shown by blocks) (Busch & Gensterblum, 2011).
Figure 6. CO2 emissions in Brazil per industry (J. M. Ketzer, Machado, Rockett, & Iglesias, 2015).
4. CCUS in Brazil
Figure 3. CO2 abatement: state of art. (C. F. A. Rodrigues et al., 2015)
Figure 8. Location of Brazilian sedimentary basins according to its potential for CCS, and of fossil coal deposits in the southern states (Kalkreuth et al., 2008). CO2 emissions in Brazil per industry ( Ketzer, et al, 2015).