A continuous process for manufacture of magnesite and silica from olivine, CO2 and H2O

Munz, I. A.; Kihle, J.; Brandvoll, Øyvind; Machenbach, Ingo; Carey, J. William; Haug, T.A.; Johansen, H.; Eldrup, Nils Henrik

doi:10.1016/j.egypro.2009.02.319

Cited by 29 publications

(11 citation statements)

References 12 publications

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“…Also, calcitization and Mg-depletion of ultramafic rocks are commonly observed, but again, no attempts have been made to study these processes in experiments. Most of the recent experimental studies that were conducted to evaluate the efficiency of potential CO 2 mineral sequestration technologies have focused on the formation of magnesite from pure olivine or fresh peridotite (e.g., O' Connor et al, 2004;Giammar et al, 2005;Chizmeshya et al, 2007;Gerdemann et al, 2007;Andreani et al, 2009;Dufaud et al, 2009;Munz et al, 2009;Garcia et al, 2010). However, several difficulties that could drastically limit the efficiency of such processes exist, including the high supersaturation needed for magnesite nucleation and growth (e.g., Giammar et al, 2005;Saldi et al, 2009) and the uptake of Mg by secondary hydrous Mg-silicates (King et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the carbonation of partially serpentinized and weathered peridotites

Hövelmann

Austrheim

Beinlich

et al. 2011

Geochimica et Cosmochimica Acta

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Section: Introductionmentioning

confidence: 99%

Experimental study of the carbonation of partially serpentinized and weathered peridotites

Hövelmann

Austrheim

Beinlich

et al. 2011

Geochimica et Cosmochimica Acta

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“…Compared with other CCS technologies, it has the advantage of safely storing CO 2 for a very long, if not infinite, time, by converting CO 2 into a solid phase. Through a reaction between rich calcium and magnesium ions in natural alkaline ores [8][9][10][11][12][13][14][15][16][17][18] and alkaline wastes [19][20][21][22][23], CO 2 could be converted into stable solid carbonates, such as magnesium carbonate and calcium carbonate. Forsterite, with a high CO 2 conversion rate, is the main mineralization material.…”

mentioning

confidence: 99%

Simultaneous mineralization of CO2 and recovery of soluble potassium using earth-abundant potassium feldspar

Xie

Wang

et al. 2012

Chin. Sci. Bull.

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CO 2 capture and storage (CCS) is an important strategy in combatting anthropogenic climate change. However, commercial application of the CCS technique is currently hampered by its high energy expenditure and costs. To overcome this issue, CO 2 capture and utilization (CCU) is a promising CO 2 disposal method. We, for the first time, developed a promising method to mineralize CO 2 using earth-abundant potassium feldspar in order to effectively reduce CO 2 emissions. Our experiments demonstrate that, after adding calcium chloride hexahydrate as an additive, the K-feldspar can be transformed to Ca-silicates at 800C, which can easily mineralize CO 2 to form stable calcium carbonate and recover soluble potassium. The conversion of this process reached 84.7%. With further study, the pretreatment temperature can be reduced to 250C using hydrothermal method by adding the solution of triethanolamine (TEA). The highest conversion can be reached 40.1%. The process of simultaneous mineralization of CO 2 and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change. CCU, mineralization, potassium feldspar, potassium salts, CCS Citation:Xie H P, Wang Y F, Ju Y, et al. Simultaneous mineralization of CO 2 and recovery of soluble potassium using earth-abundant potassium feldspar. Chin Sci Bull, 2013Bull, , 58: 128132, doi: 10.1007 Carbon dioxide (CO 2 ), produced from the combustion of fossil minerals, is considered to be one of the main factors responsible for global climate change. CO 2 emission reduction has become a significant issue of common concern worldwide. CO 2 capture and storage (CCS) is currently considered one of the most effective techniques for reducing emissions, maintaining the current atmospheric CO 2 concentration, and alleviating greenhouse gas effects [1,2]. While a number of countries or regions have carried out field demonstration projects related to CO 2 geological storage to test CCS, wide application of the CCS is mainly hampered by its high costs. To alleviate the associated costs, appropriate strategy should be focused on carbon capture and utilization (CCU) [3][4][5][6]. By CCU, we mean CO 2 being captured and used as raw material to produce high-value products (or related by-products) thereby reducing CO 2 emissions. In industry, one of method of utilization of CO 2 is transforming CO 2 into organic chemicals or polymers. Another method was regenerate methanol and hydrocarbon from CO 2 and H 2 O which can be used as fuel. These two methods confronted the problem of high material cost, high energy consuming and short lifetime of product. Therefore, many people considered that the CCU method can only transforming small amount of CO 2 , which has little effect on reducing the emission of CO 2 , and the CCU cannot be regarded as the main CO 2 disposal method. CO 2 mineralization is a relatively new technology in the field of CO 2 geological sequestration [7]. Compared with

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“…Work on a three-step process of olivine carbonation, involving (i) dissolution of olivine, (ii) precipitation of magnesite and (iii) precipitation of silica in an aqueous solution was recently reported from norway (Munz et al, 2009), where the process proceeds without chemical additives at 100-150 bar and 130-250 °C. no reaction rates were, however, reported.…”

Section: Recent Developments (2005-today)mentioning

confidence: 98%

Mineralisation of carbon dioxide (CO2)

Zevenhoven

Fagerlund

2010

Developments and Innovation in Carbon Dioxide (CO2) Capture and Storage Technology

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A continuous process for manufacture of magnesite and silica from olivine, CO2 and H2O

Cited by 29 publications

References 12 publications

Experimental study of the carbonation of partially serpentinized and weathered peridotites

Experimental study of the carbonation of partially serpentinized and weathered peridotites

Simultaneous mineralization of CO2 and recovery of soluble potassium using earth-abundant potassium feldspar

Mineralisation of carbon dioxide (CO2)

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