Carbon dioxide disposal in carbonate minerals

Mineral CO2 sequestration by environmental biotechnological processes

“…Additional advantages of the process as compared to other available carbon dioxide storage options (e.g. geological storage and ocean storage) are the inherently safe nature of the process and high sequestration capacity based on the existing resources of silicate minerals worldwide (Lackner et al, 1995). The main challenge in applying the mineral carbonation process, however, is the slow kinetics of the process.…”

“…Alkaline silicate minerals such as wollastonite can potentially provide the divalent cation and alkalinity needed for the capture and sequestration of CO 2 at ambient environmental conditions (reaction 2.2) (Daval et al, 2009). There are far more than sufficient alkaline silicate materials available to sequester the equivalent CO 2 of the total known amount of fossil fuels (Graves et al, 2006;Kelemen & Matter, 2008;Lackner et al, 1995). However, the slow release rate of divalent cations from these minerals under neutral and alkaline pH conditions, the same pH at which the carbonate ion (CO 3 2-) can form from CO 2 in water, is one the main reasons of limited application of the mineral carbonation process, up to now (Brantley et al, 2003;Lackner, 2003).…”

“…The effectiveness of the process for climate change mitigation purposes is however limited due to the slow kinetics of the CO 2 -silicate reactions (Oelkers et al, 2008). Lackner et al 1995 introduced a number of chemical and physical methods to increase the rate of the process by accelerating the weathering rate of silicate minerals and precipitation rate of carbonate minerals (Lackner et al, 1995). Application of biological processes has also shown to be a cost-effective approach for accelerating CO 2 sequestration by mineral carbonation (Bennett et al, 2001;Cailleau et al, 2004;Castanier et al, 1999;Huijgen et al, 2003;Mirjafari et al, 2007;Pokrovsky et al, 2009).…”

A Novel Strategy for Carbon Capture and Sequestration by rHLPD Processing

“…In addition to the extensive energy required for the aminescrubbing process, there are also ecological concerns regarding the consequences of storing CO2 in geological formations or beneath the ocean, such as leakage of CO2 from the subterranean reservoirs (Lackner et al, 1995). Moreover, some countries, such as Finland and India, do not have sufficient storage capacity or lack suitable storage formations, and hence cannot sequester CO2 in this manner (Teir et al, 2007).…”

“…Moreover, some countries, such as Finland and India, do not have sufficient storage capacity or lack suitable storage formations, and hence cannot sequester CO2 in this manner (Teir et al, 2007). Due to these concerns, there has been increasing interest in mineral carbonation (Lackner et al, 1995;Lackner and Ziock, 2000;Huijgen et al, 2006;Matter and Kelemen, 2009). The concept of CO2 sequestration in mineral carbonation is based on accelerating the natural weathering process of rocks.…”