An experimental investigation of mesoporous MgO as a potential pre-combustion CO2 sorbent

Kumar, Sushant; Saxena, Surendra K.; Drozd, Vadym; Durygin, Andriy

doi:10.1007/s40243-015-0050-0

Cited by 18 publications

(9 citation statements)

References 36 publications

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“…The prepared sample showed a high surface area and a high CO 2 adsorption capacity at 200 C. More recently, porous MgO was also used as sorbent for CO 2 capture at intermediate temperatures [18e20]. For instance, Kumar et al examined the CO 2 capture capacity of mesoporous MgO as a potential pre-combustion CO 2 adsorbent [21]. The results showed that 96.96% of MgO was converted to MgCO 3 at 350 C and CO 2 pressure of 10 bar.…”

Section: Introductionmentioning

confidence: 99%

Bench scale study of CO2 adsorption performance of MgO in the presence of water vapor

Ding

Song

Liu

et al. 2016

Energy

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Section: Introductionmentioning

confidence: 99%

Bench scale study of CO2 adsorption performance of MgO in the presence of water vapor

Ding

Song

Liu

et al. 2016

Energy

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“…That can be related to kinetics limitations. It is clear that water acts as a catalyst in the carbonation process of metal oxides [13,22]. Figure 4 reveals that a considerable amount of siderite can be obtained by 20 h of milling.…”

Section: Iron Ore Carbonation In Mechanochemical Processmentioning

confidence: 98%

Siderite Formation by Mechanochemical and High Pressure–High Temperature Processes for CO2 Capture Using Iron Ore as the Initial Sorbent

et al. 2019

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Iron ore was studied as a CO2 absorbent. Carbonation was carried out by mechanochemical and high temperature–high pressure (HTHP) reactions. Kinetics of the carbonation reactions was studied for the two methods. In the mechanochemical process, it was analyzed as a function of the CO2 pressure and the rotation speed of the planetary ball mill, while in the HTHP process, the kinetics was studied as a function of pressure and temperature. The highest CO2 capture capacities achieved were 3.7341 mmol of CO2/g of sorbent in ball milling (30 bar of CO2 pressure, 400 rpm, 20 h) and 5.4392 mmol of CO2/g of absorbent in HTHP (50 bar of CO2 pressure, 100 °C and 4 h). To overcome the kinetics limitations, water was introduced to all carbonation experiments. The calcination reactions were studied in Argon atmosphere using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) analysis. Siderite can be decomposed at the same temperature range (100 °C to 420 °C) for the samples produced by both methods. This range reaches higher temperatures compared with pure iron oxides due to decomposition temperature increase with decreasing purity. Calcination reactions yield magnetite and carbon. A comparison of recyclability (use of the same material in several cycles of carbonation–calcination), kinetics, spent energy, and the amounts of initial material needed to capture 1 ton of CO2, revealed the advantages of the mechanochemical process compared with HTHP.

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“…As it has been shown that carbonation remains very low for MgO samples with low specific surface area even under high CO 2 pressure (10 bars) [11], our carbonation tests were performed using the home-made MgO-T exhibiting a higher specific surface area and pore volume.…”

Section: Reaction Of Mgo With Comentioning

confidence: 99%

“…From the studies of Fagerlund et al [10] and Kumar et al [11] the carbonation of MgO takes place only at high temperature (300°C-350°C) and pressure (10 bar -20 bar) range in the presence of water vapor ( >5%). Otherwise at low or high temperature and atmospheric pressure a small weight gain (less than 8%) can be observed and it is explained by physical or chemical adsorption [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and low-temperature carbonation of mesoporous magnesium oxide

Hamdi

Vieille

Nahdi

et al. 2019

J Therm Anal Calorim

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To cite this version:Sondes Hamdi, Laetitia Vieille, Kais Nahdi, Loïc Favergeon. Synthesis, characterization and low temperature carbonation of mesoporous magnesium oxide. AbstractA sample of MgO was successfully synthesized using thermal decomposition of hydromagnesite and compared to commercial material. The characterization of materials using XRD, SEM, BET and BJH methods showed that the thermal decomposition way led to rectangular mesoporous micro-sheets with high specific surface area of 100 m 2 g -1 . This porous magnesium oxide has been shown to be a potential candidate for CO 2 capture at low temperatures range (30 and 50° C), low pressures of CO 2 (P CO2 = 600 mbar) and in the presence of water vapor (P H2O = 15 mbar). In these conditions our results show that 11% of MgO was converted to hydrated magnesium carbonate MgCO 3 .3H 2 O after 8h of carbonation in a thermobalance, and reached 54% after 24h of carbonation using tube furnace. After carbonation hydration reaction pore size and surface area have noticeably changed.

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An experimental investigation of mesoporous MgO as a potential pre-combustion CO2 sorbent

Cited by 18 publications

References 36 publications

Bench scale study of CO2 adsorption performance of MgO in the presence of water vapor

Bench scale study of CO2 adsorption performance of MgO in the presence of water vapor

Siderite Formation by Mechanochemical and High Pressure–High Temperature Processes for CO2 Capture Using Iron Ore as the Initial Sorbent

Synthesis, characterization and low-temperature carbonation of mesoporous magnesium oxide

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