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Scalable solvent-free synthesis of aggregated nanosized single-phase cancrinite zeolite

Joseph, Ifeoma V, Doyle, Aidan M, Amedlous, Abdallah, Mintova, Svetlana and Tosheva, Lubomira (2022) Scalable solvent-free synthesis of aggregated nanosized single-phase cancrinite zeolite. Materials Today Communications, 32. p. 103879. ISSN 2352-4928

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Pure cancrinite zeolite was prepared using a solvent-free method from a geophagic clay. The morphology of the zeolite could be controlled through the composition of the raw mixture. Aluminum sulfate octadecahydrate was used for the first time as a source of trace water in the solvent-free synthesis of a zeolite. Aggregated nanosized single-phase cancrinite zeolite were prepared using a mixture of the clay, aluminum sulfate octadecahydrate and sodium hydroxide. The mixture was manually mixed and heated at 150 °C for 6 h. Scaling up the synthesis to 2, 4 and 8 times resulted in products with remarkably consistent textural characteristics. The cancrinite prepared showed potential for use as a low-cost adsorbent for CO2 capture at very low CO2 concentrations.

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