Performance and Kinetic Evaluation of Synthesized CuO/SBA‐15 Oxygen Carrier for Chemical Looping with Oxygen Uncoupling. Issue 10 (8th July 2019)

• Record Type: Journal Article
• Authors: Dubey, Ashwani Kumar; Samanta, Arunkumar; Sarkar, Pinaki; Dey, Runa; Saxena, Vinod Kumar
• Is Part Of: Energy technology. Volume 7:Issue 10(2019:Oct.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-07-08
• Subjects: chemical looping oxygen uncoupling -- kinetics -- oxygen carrier -- reduction -- reoxidation; Energy development -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1002/ente.201900407
• Languages: English
• ISSNs: 2194-4288

Abstract

Abstract : Chemical looping oxygen uncoupling (CLOU), a variant of chemical looping combustion (CLC), is one of the most promising combustion technologies for inherent separation and feasible capture of carbon dioxide. Herein, synthesized SBA‐15, a highly ordered mesoporous silica support, is used to host CuO for developing a new variant of an oxygen‐carrier material. Based on thermoanalytical evaluations, a typical CuO/SBA‐15 composition with 36 mass% CuO loading is identified as highly suitable with an average oxygen transport capacity of 3.61%. In addition, extensive studies along with model‐dependent kinetic evaluations are carried out using isothermal thermogravimetric data for the reduction–reoxidation of CuO/SBA‐15. It is observed that the Avrami‐Erofeev random nucleation and subsequence growth model (A2) fitted well for the reduction reaction, while the 3D diffusion model (D3) described suitably the reoxidation reaction in the temperature range of 800–950 °C. Reduction–reoxidation rate data and kinetic information derived from corresponding isothermal conversion curves can contribute immensely to design and establish operational strategies for interconnected CLOU reactors. Abstract : Herein, synthesized mesoporous SBA‐15 silica framework as support material for a CuO‐based oxygen carrier is investigated for potential applications in the chemical looping oxygen uncoupling (CLOU) process. A typical CuO/SBA‐15 composition with 36 mass% CuO is identified as suitable with an oxygen transport capacity of 3.61%. The resulting kinetic information is likely to contribute immensely to the design of CLOU reactors.