Open AccessTHE CALCIUM LOOPING CYCLE STUDY FOR CAPTURING CARBON DIOXIDE APPLIED TO THE ENERGY GENERATION
Author(s) -
Ivonete Ávila,
Daniela Andresa Mortari,
Antônio M. dos Santos,
Paula Cristina Garcia Manoel Crnkovic
Publication year - 2013
Publication title -
engenharia térmica
Language(s) - English
Resource type - Journals
ISSN - 1676-1790
DOI - 10.5380/reterm.v12i2.62041
Subject(s) - calcium looping , carbonation , calcination , carbon dioxide , sorbent , calcium oxide , chemical engineering , calcium carbonate , materials science , dolomite , carbon capture and storage (timeline) , sintering , chemical looping combustion , carbon sequestration , fluidized bed , chemistry , mineralogy , adsorption , metallurgy , geology , catalysis , organic chemistry , oceanography , climate change , engineering
The calcium looping process (Ca-L) is a promising technology to reduce of the carbon dioxide (CO2) emissions when applied in energy generation systems. Ca-based materials (usually limestone) are used in this process as CO2 sorbents. Thus, the CO2 capture occurs by the reversible reaction between calcium oxide (CaO) and CO2, resulting in the calcium carbonate form (CaCO3). Compared to other technologies applied to carbon sequestration process, the Ca-L offers additional advantages such: the use of fluidized bed technology that is already well established; this process occurs at high temperature, and the excess of heat generated can be recovered; the cost of limestone sorbents is low because of its wide availability. However, in the applying the Ca-L process is essential to understand the mechanism and the effect of partial pressure of CO2 in both, calcination and carbonation processes; to investigate the effect of sintering and to evaluate the sorbent activity decay. In this paper, empirical technique such as thermogravimetry is applied to investigate the reactivity of dolomite as CO2 sorbent. The effect of CO2 high concentrations in both calcination/carbonation processes is also investigated.