eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. initial rise in CO 2 uptake capacity in the first 10 carbonation-decarbonation cycles, increasing from 0.31g-CO 2 / g-sorbent in cycle 1 to 0.37 g-CO 2 / g-sorbent in cycle 10 and stabilizing at this value for the remainder of the 30 cycles tested: carbonation at 650 in 15% CO 2 ; calcination at 800 in air. Under more severe conditions of calcination at 950 in 100% CO 2 following carbonation at 650 in 100 % CO 2 , the best overall performance was for a sorbent with 30 wt% CaZrO 3 : 70 wt% CaO (the highest Zr ratio studied), with an initial uptake of 0.36 g-CO 2 /g-sorbent decreasing to 0.31 g-CO 2 /g-sorbent at the 30 th cycle.Electron microscopy revealed CaZrO 3 was present in the form of ≤ 0.5 µm cuboid and 20-80 nm particles dispersed within a porous matrix of CaO/CaCO 3 ; the nanoparticles are considered to be the principal reason for promoting multicycle durability.

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The layered semiconductor Pt-HCa(2)Nb(3)O(10) can catalyze room temperature air oxidation of methyl orange. It is also more effective than Pt-WO(3) in catalyzing reaction of methanol with air. Pt-HCa(2)Nb(3)O(10) could find wide application as a mild oxidizing catalyst.

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