Kinetics studies on wet and dry gas–solid carbonation of MgO and Mg(OH)2 for CO2 sequestration

Fagerlund, Johan; Highfield, James; Zevenhoven, Ron

doi:10.1039/c2ra21428h

Cited by 116 publications

(117 citation statements)

References 44 publications

Supporting

Mentioning

112

Contrasting

Order By: Relevance

“…ions in the solution; (ii) partial dissolution of CO 2 at the gas/water interface, resulting in CO 3 2-ions; (iii) clustering of CO 3 2-ions with Ca 2? ions in the bulk solution forming highly disordered amorphous intermediate leading to nanoscopic ACC (iv) homogenous nucleation, homogenous coalescence and dehydration of the nanoscopic ACC, in accordance with the pre-nucleation clustering theory [31], or heterogeneous nucleation via reaction of the CO 3 2-ions with the Ca(OH) 2 layer on the CaO particle surface, forming a shell of ACC; (v) cracking of the ACC shell due to the higher volume of the carbonate [32], resulting in nuclei of ACC suspended in solution, and (vi) growth with either the attachment of Ca 2? and CO 3 2-ions (classical crystallization) or aggregation of suspended ACC clusters (nonclassical crystallization) till a critical size is reached, and finally (vi) the growth and phase transformation of ACC to calcite by dehydration of crystallization through vaterite and/or aragonite intermediary states [33].…”

Section: Mechanism Of In Situ Modificationmentioning

confidence: 83%

Roles of in situ surface modification in controlling the growth and crystallization of CaCO3 nanoparticles, and their dispersion in polymeric materials

et al. 2015

View full text Add to dashboard Cite

The in situ surface modification of inorganic nanoparticles (NPs) and its influence on the size, morphology, and particle surface properties is increasingly receiving attention. Control of the size and morphology and perfect dispersion of inorganic NPs in polymer matrices fabricates soft materials with unique optical, electrical, magnetic, gas barrier, self-healing, and thermal and mechanical properties. This study explores the strategy of the in situ modification of inorganic NPs (CaCO 3 ) with cationic and anionic surfactants and the role of in situ modification on the dispersion of these NPs in thermoplastic polymers (poly e-caprolactone, PCL). The surfactants having an appropriate polar head with a high charge density bind onto the crystal's nuclei, protect them against extensive aggregation, and consequently control the size, morphology, and surface properties of the produced NPs. This permits formulation of hybrid materials with enhanced thermal stability and tensile modulus and with a marked increase of the crystallization rate.

show abstract

Section: Mechanism Of In Situ Modificationmentioning

confidence: 83%

Roles of in situ surface modification in controlling the growth and crystallization of CaCO3 nanoparticles, and their dispersion in polymeric materials

et al. 2015

View full text Add to dashboard Cite

show abstract

“…No difference was found for Mg(OH) 2 produced (using the same procedure but at different locations) from Finnish, Lithuanian or other rock. [24,26].…”

Section: Mg(oh) 2 Extraction From the Serpentinite Rockmentioning

confidence: 98%

“…See Figure 6 [24,26]. Clearly, the carbonation reaction is competing with calcination, which gives much less reactive MgO.…”

Section: Mg(oh) 2 Extraction From the Serpentinite Rockmentioning

confidence: 99%

Parameters affecting Mg(OH)₂ extraction from serpentinites in lithuania for the purpose of CO₂ reduction by mineral carbonation

Stasiulaitienė

Vajegaite

Martuzevičius

et al. 2013

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Mineral sequestration has a great potential for abating CO 2 emissions, especially at locations where no opportunities for CO 2 geological storage exist. This article focuses on the mineral carbonation of magnesium silicates, that is, serpentinites, which offers an attractive option for CO 2 emission mitigation in Lithuania. Mineral CO 2 carbonation in a staged gas/solid process route is one of the most prospective approaches. The process was conducted in several steps. Firstly, extraction of the magnesium hydroxide from serpentinite via a solid/solid reaction between serpentinite and ammonium sulfate salt at a temperature interval of 500-540 C was carried out. The maximum Mg extraction (53.70 %) was obtained with the mass ratio of reactants of 2 g serpentinite/3 g ammonium sulfate, reaction temperature, and time of 520 C and 20 min, respectively. Secondly, the process of precipitation of Mg(OH) 2 took place. The effect of precipitation of the Fe-containing compounds (first step) and the Mg(OH) 2 (second step) was analyzed. At the pH of 8-10 and 10-12, compounds of Fe and Mg precipitated, respectively. The optimal Fe removal and Mg extraction was achieved at the pH of the $9.5 for the first step and at the pH of $11.50 for the second step. Finally, the carbonation of extracted magnesium hydroxide was accomplished and reached the effectiveness of 65 % after 15 min at 535 C, 51 bar.

show abstract

“…Moreover, oxymagnesite can also be formed as a product of reaction between Mg (OH) 2 and CO 2 in anhydrous synthesis [29] and/or solid-state reaction of MgO and CO 2 using steam [38]. In this regard, Duan et al [13] calculated the phase diagram of MgO-Mg(OH) 2 -MgCO 3 , which suggests that the transition temperature for direct conversion of MgCO 3 to Mg(OH) 2 increases with increase in P H2O .…”

Section: -40mentioning

confidence: 99%

“…Under humid condition, MgO rapidly locks CO 2 in the form of MgCO 3 . Recently, Fagerlund et al [29] proposed the reaction mechanism for MgO carbonation in the presence of steam: Here, we used mortar and pestle to grind the product. As mentioned earlier, we conducted each experiment for 30 min and ground the sample after that.…”

Section: -40mentioning

confidence: 99%

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

Kumar

Saxena

Drozd

et al. 2015

Mater Renew Sustain Energy

View full text Add to dashboard Cite

We examined the CO 2 capture capacity of mesoporous MgO (325 mesh size, surface area = 95.08 ± 1.5 m 2 /g) as a potential pre-combustion CO 2 sorbent. Our results show that 96.96 % of MgO was converted to MgCO 3 at 350°C and 10 bars CO 2 pressure. The sorbent could be completely regenerated at 550°C under argon flow. The sorption rate parameters such as surface area and pore size were investigated.

show abstract

Kinetics studies on wet and dry gas–solid carbonation of MgO and Mg(OH)2 for CO2 sequestration

Cited by 116 publications

References 44 publications

Roles of in situ surface modification in controlling the growth and crystallization of CaCO3 nanoparticles, and their dispersion in polymeric materials

Roles of in situ surface modification in controlling the growth and crystallization of CaCO3 nanoparticles, and their dispersion in polymeric materials

Parameters affecting Mg(OH)₂ extraction from serpentinites in lithuania for the purpose of CO₂ reduction by mineral carbonation

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

Contact Info

Product

Resources

About

Kinetics studies on wet and dry gas–solid carbonation of MgO and Mg(OH)2 for CO2 sequestration

Cited by 116 publications

References 44 publications

Roles of in situ surface modification in controlling the growth and crystallization of CaCO3 nanoparticles, and their dispersion in polymeric materials

Roles of in situ surface modification in controlling the growth and crystallization of CaCO3 nanoparticles, and their dispersion in polymeric materials

Parameters affecting Mg(OH)2 extraction from serpentinites in lithuania for the purpose of CO2 reduction by mineral carbonation

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

Contact Info

Product

Resources

About

Parameters affecting Mg(OH)₂ extraction from serpentinites in lithuania for the purpose of CO₂ reduction by mineral carbonation