Development of a process for producing high‐purity calcium carbonate (CaCO<sub>3</sub>) from waste cement using pressurized CO<sub>2</sub>

Katsuyama, Yasuro; Yamasaki, Akira; Iizuka, Atsushi; Fujii, Minoru; Kumagai, Kazukiyo; Yanagisawa, Yukio

doi:10.1002/ep.10080

Cited by 107 publications

(64 citation statements)

References 45 publications

(87 reference statements)

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“…Although the produced iron oxide and MgCO3 solids were highly pure, the overall cost of process is still very high [11]. Katsuyama et al (2005) developed a high purity calciu m carbonate production system fro m waste cement through a two-step aqueous process. Calciu m ion was first extracted fro m the cement and water slurry at a high CO2 pressure condition (30 bar) and then in the second step calcium carbonate was precipitated by CO2 pressure reduction to 1 bar at ambient temperature.…”

Section: Why Ph Swing?mentioning

confidence: 99%

Carbon Dioxide Mineral Carbonation Through pH-swing Process: A Review

et al. 2014

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The promotion of carbon dioxide (CO2) reduction methods is due to the fact that the CO2 concentration has been increasing rapidly in 21 st century. In order to prevent further damage of the environment caused by greenhouse gases, CO2 concentration should be stabilized by increasing CO2 fixation, which can reduce CO2 emission into the atmosphere. M ineral carbon sequestration or mineral carbonation is the process of utilizing minerals, mostly rich in calcium and magnesium (Ca/M g) as the feedstock in reaction with CO2 to produce stable solid carbonates. M ineral carbonation through indirect pH swing process is a very effective method for producing calcium and magnesium carbonates. The Ca/M g ions are extracted out of feedstock using suitable solvents at low pH condition and then in the second step the leached Ca/M g ions are carbonated at elevated pH condition. In this paper the state-of-the-art of the carbonation involving pH swing method is updated. Introducti onFossil fuels by providing mo re than 86% of the world energy are the main energy sources in the world. Co mbustion of these huge amounts of fossil fuels emit g reenhouse gases (GHGs) and in particu lar carbon dio xide (CO2) into the at mosphere. Continuous increment of g lobal CO2 due to co mbustion of fossil fuels leads to steady rise of global mean temperature. These activit ies have resulted in increasing the CO2 concentration fro m 280 pp m in the 1750s to 398 ppm in 2013. As a consequence, the global climate has

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Section: Why Ph Swing?mentioning

confidence: 99%

Carbon Dioxide Mineral Carbonation Through pH-swing Process: A Review

et al. 2014

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“…So, 30% of total indirect emissions of CO 2 could be mitigated. Finally, it must be remarked that the carbon sequestration by-product is calcite, a valuable product that can be simply disposed of, used in different industries or commercialized as precipitated calcium carbonate [33].…”

Section: Industrial Scale-upmentioning

confidence: 99%

Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Morales‐Flórez

Santos

Lemus

et al. 2011

Chemical Engineering Journal

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a b s t r a c tProcesses of carbonation of calcium-rich aqueous industrial wastes from acetylene production were performed mimicking rock weathering, using the atmospheric carbon dioxide as reactant. This residue was carbonated exposing it to the air in artificial pools with controlled solid-to-liquid and surface-tovolume ratios, and the efficiency of this simple mineral carbonation process was maximized. Considering realistic values of just one acetylene production plant, the intelligent handling of the calcium-rich waste would make it possible to counteract the emission of around 800 t of carbon dioxide per year, so the CO 2 emissions of the acetylene production could be completely compensated and its carbon footprint significantly reduced.X-ray diffraction patterns and thermogravimetric analyses reported the conversion, up to 88%, of the calcium hydroxide into calcium carbonate under atmospheric conditions. So, considering a realistic industrial scale-up, 476 kg of CO 2 could be captured with 1 t of dry waste. The morphology of the grains is resolved by electron microscopy, and can be described as needles 15 nm wide and 200 nm long arranged in grains smaller than 1 micron. We exploit these nanometric textural parameters (nanometric pores and particles having a specific surface area ∼50 m 2 /g) to design an efficient carbon fixation procedure. The aim of this work is to propose this simple carbonation technology, based on aqueous alkaline industrial waste, as a contribution to reducing global CO 2 emissions.

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“…It is known that steelmaking slag is more reactive than wollastonite, or, in other words, chemically more instable [5]; therefore, experiments with steel slag (and PBA) were conducted in order to obtain a high-quality product of precipitated calcium carbonate (PCC), which is used as a paper filler and coating chemical in the paper industry and as such a valuable product. Normally, PCC consisting of 98 wt-% of CaCO 3 is considered pure; while a product consisting of 99 wt-% is considered to have high purity [6]. The purity of the product can be measured by, e.g., its brightness: even very small amounts of different elements (e.g., Mn, Fe) can miscolor the product (the wanted color for the product is white).…”

Section: Introductionmentioning

confidence: 99%

Carbonation of calcium-containing mineral and industrial by-products

Zevenhoven

Wiklund

Fagerlund

et al. 2009

Front. Chem. Eng. China

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The use of carbon dioxide (CO 2 ) and calciumcontaining by-products from industrial activities is receiving increasing interest as a route to valuable carbonate materials while reducing CO 2 emissions and saving natural resources. In this work, wet-chemical experimental data was assessed, which involved the carbonation of three types of materials in aqueous solutions, namely, 1) wollastonite, a calcium silicate mineral, 2) steelmaking slag, a by-product of steel production, and 3) paper bottom ash (PBA) from waste paper incineration. Aims were to achieve either a high carbonation degree and/or a pure carbonate product with potential commercial value. Producing a pure precipitated calcium carbonate (PCC) material that may find use in paper industry products puts strong requirements on purity and brightness. The parameters investigated were particle size, CO 2 pressure, temperature, solid/liquid ratio, and the use of additives that affect the solubilities of CO 2 and/or calcium carbonate. Temperatures and pressures were varied up to 180°C and 4 MPa. Data obtained with the wollastinite mineral allowed for a comparison between natural resources and the industrial by-product materials, the latter typically being more reactive. With respect to temperature and pressure trends reported by others were largely confirmed, with temperatures above 150°C introducing thermodynamic limitations depending on CO 2 pressure. The influence of additives showed some promise, although costs may make recycling and reuse of additives a necessity for a largescale process. When using steelmaking slag, magnetic separation may remove some iron-containing material from the process (although this is far from perfect), while the addition of bicarbonate supported the removal of phosphorous, aside from improving calcium extraction. The experiments with paper bottom ash (PBA) gave new data, showing that its reactivity resembles that of steelmaking slag, while its composition results in relatively pure carbonate product. Also, with PBA no additives were needed to achieve this.

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Development of a process for producing high‐purity calcium carbonate (CaCO₃) from waste cement using pressurized CO₂

Cited by 107 publications

References 45 publications

Carbon Dioxide Mineral Carbonation Through pH-swing Process: A Review

Carbon Dioxide Mineral Carbonation Through pH-swing Process: A Review

Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Carbonation of calcium-containing mineral and industrial by-products

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Development of a process for producing high‐purity calcium carbonate (CaCO3) from waste cement using pressurized CO2

Cited by 107 publications

References 45 publications

Carbon Dioxide Mineral Carbonation Through pH-swing Process: A Review

Carbon Dioxide Mineral Carbonation Through pH-swing Process: A Review

Artificial weathering pools of calcium-rich industrial waste for CO2 sequestration

Carbonation of calcium-containing mineral and industrial by-products

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Development of a process for producing high‐purity calcium carbonate (CaCO₃) from waste cement using pressurized CO₂