CO2 capture and preparation of spindle-like CaCO3 crystals for papermaking using calcium carbide residue waste via an atomizing approach
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Spindle-like CaCO3 crystals with controllable sizes for papermaking were successfully prepared using CO2 (8% CO2/N2 mixture gas) and calcium carbide residue (CCR) waste, a by-product of acetylene gas and polyvinyl chloride production, as the raw materials by an atomization method at room temperature. The influences of solution concentration, reaction temperature, and gas/liquid flow rate ratios on the properties of the CaCO3 crystal were systematically investigated, and a possible atomization mechanism was proposed. The size of the as-prepared CaCO3 crystal with pure calcite phase was turned from 4.71×4.02 µm to 1.82×1.12 µm by adjusting the reaction conditions. The application of the as-prepared CaCO3 crystals from CCR waste as a filler for papermaking was explored. The R475 blue light whiteness of paper was increased from 77.3 to 80.6 with 11.4% CaCO3 crystals.
KeywordsCalcium Carbide Residue (CCR) Spindle-like CaCO3 Carbon Dioxide Capture Atomization Papermaking
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This work was supported by the National Natural Science Foundation of China (21666027), the Program for Grassland Excellent Talents of Inner Mongolia Autonomous Region, the Natural Science Foundation of Inner Mongolia Autonomous Region (2016JQ02), Key Laboratory of Coal-based CO2 Capture and Geological Storage (Jiangsu Province, China University of Mining and Technology, 2016A06), the Inner Mongolia Science and Technology Key Projects, and training plan of academic backbone in youth of Inner Mongolia University of Technology.