Combustion synthesis of C/MgAl<sub>2</sub>O<sub>4</sub> composite powders using magnesium oxalate as carbon source

Lv, Lihua; Xiao, Guoqing; Ding, Donghai; Ren, Yun; Yang, Shoulei; Yang, Piaoping; Hou, Xing

doi:10.1111/ijac.13134

Cited by 22 publications

(10 citation statements)

References 29 publications

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“…Moreover, fine oxalate material can become mobilized and pollute surface water and aquifers, posing a health hazard if ingested. 54 In addition, oxalate minerals can also decompose at high temperatures, 55 releasing stored carbon. Determining the stability of solid oxalates under a range of environmental conditions will be a critical step in evaluating the method as a viable option for long-term carbon storage.…”

Section: Discussionmentioning

confidence: 99%

Carbon Storage through Rapid Conversion of Forsterite into Solid Oxalate Phases

2022

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Carbon capture and storage are likely to be critical components in lowering atmospheric CO 2 levels. Mineralization is often proposed as a method to store carbon and typically involves reacting CO 2 directly with silicate minerals, such as forsterite, to form carbonate minerals. However, this reaction is slow under standard conditions, so that sequestering significant amounts of carbon can take years or decades. Here, we demonstrate the feasibility of using a reaction between oxalic acid and forsterite to create stable carbonbearing oxalate minerals. We performed a series of batch experiments at room temperature and pressure to quantify the forsterite dissolution rate and the efficiency of Mg utilization. Our results show that conversion of forsterite to Mg and Fe oxalate is achieved rapidly: after 30 days, 52% of Mg was converted to Mg oxalate so that 1 t of forsterite can be used to store 177 kg of carbon. Our calculations show that reacting ultramafic mine tailings with oxalic acid has the potential to make a significant contribution toward the global target for CO 2 removal by carbon capture and storage.

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Section: Discussionmentioning

confidence: 99%

Carbon Storage through Rapid Conversion of Forsterite into Solid Oxalate Phases

2022

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“… 10 A double firing process was proposed to solve this problem. 9 However, owing to high costs of the process, a variety of alternative simple methods have been proposed such as combustion synthesis, 11 − 13 sol–gel, 14 , 15 microwave-assisted combustion route, 16 co-precipitation method, 17 and so on. Among these processes, combustion synthesis, also known as self-propagating high-temperature synthesis (SHS), is an easy, fast, and cost-effective method for synthesizing composites.…”

Section: Introductionmentioning

confidence: 99%

Self-Propagating High-Temperature Synthesis of Magnesium Aluminate Spinel Using Mg–Al Alloy

2022

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In this study, magnesium aluminate spinel (MgAl 2 O 4 ) was synthesized by a self-propagating high-temperature synthesis method using Mg–Al alloy with a Mg/Al mass ratio of 50:50 as raw material. Synthesized MgAl 2 O 4 was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, UV–vis diffused reflectance spectroscopy, photoluminescence, and thermogravimetric differential scanning calorimetry techniques. The results show that synthesized products are of high purity and excellent crystallinity. However, the particle size is not uniform and there is obvious agglomeration. The crystallite size of spinel phase is calculated to be 37.78 nm. In the UV band, the synthesized MgAl 2 O 4 has a certain absorption capacity, and the extrapolated band gap is 4.02 eV. The synthesis mechanism was studied, and continued rupture and growth of the oxidation layer is thought to be responsible for grain refinement.

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“…However, the current preparation method of modified graphite is a complex work, with its long-term preparation, easy foaming of surfactants, and easy abscission of the coating layer, and therefore it has difficulty in industrialization. In recent years, some researchers have fabricated and used carbon composite powders [18][19][20] or graphitic carbon spheres [2,21] as the carbon-containing castables. Carbon composite powders with high hydrophilicity and graphitic carbon spheres can be evenly dispersed in the castable matrix, and effectively improve the fluidity and mechanical properties of the castables.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of in-situ high-content carbon-containing calcium aluminate cement and its effect on the properties of Al₂O₃-SiC-C castables

Zang

Xiao

Ding

et al. 2021

Journal of Asian Ceramic Societies

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The in-situ high-content carbon-containing calcium aluminate cement (HCCAC) with the carbon content of 20.1 wt.% was prepared by the soft chemistry method with citric acid, calcium carbonate, and alumina as raw materials. The cement product was characterized by X-ray diffractometry, scanning electron microscopy, and Raman spectroscopy. In HCCAC, platelike and fibrous carbon formed by the pyrolysis of organic acids were uniformly embedded between the calcium aluminate grains. Moreover, the carbon floating ratio of HCCAC in water was lower than that of the mechanical mixing powder of calcium aluminate cement (CAC) and carbon black, which indicated that the water dispersion of carbon was improved. Besides, the slag corrosion resistance properties of Al 2 O 3 -SiC-C castables bonded with HCCAC and CAC respectively were compared, and the results showed that the corrosion resistance depth of the HCCAC bonded castables was 45% lower than that of the CAC bonded castables. Therefore, HCCCA can be used as a novel binder of carbon-containing refractory castables.

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Combustion synthesis of C/MgAl₂O₄ composite powders using magnesium oxalate as carbon source

Cited by 22 publications

References 29 publications

Carbon Storage through Rapid Conversion of Forsterite into Solid Oxalate Phases

Carbon Storage through Rapid Conversion of Forsterite into Solid Oxalate Phases

Self-Propagating High-Temperature Synthesis of Magnesium Aluminate Spinel Using Mg–Al Alloy

Synthesis of in-situ high-content carbon-containing calcium aluminate cement and its effect on the properties of Al₂O₃-SiC-C castables

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Combustion synthesis of C/MgAl2O4 composite powders using magnesium oxalate as carbon source

Cited by 22 publications

References 29 publications

Carbon Storage through Rapid Conversion of Forsterite into Solid Oxalate Phases

Carbon Storage through Rapid Conversion of Forsterite into Solid Oxalate Phases

Self-Propagating High-Temperature Synthesis of Magnesium Aluminate Spinel Using Mg–Al Alloy

Synthesis of in-situ high-content carbon-containing calcium aluminate cement and its effect on the properties of Al2O3-SiC-C castables

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Product

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Combustion synthesis of C/MgAl₂O₄ composite powders using magnesium oxalate as carbon source

Synthesis of in-situ high-content carbon-containing calcium aluminate cement and its effect on the properties of Al₂O₃-SiC-C castables