María Erans , Gabriela Durán-Jimenez , José M. Rodríguez , Lee Stevens , Chris Dodds
{"title":"微波热预处理和煅烧用于钙循环的生物矿化吸附剂","authors":"María Erans , Gabriela Durán-Jimenez , José M. Rodríguez , Lee Stevens , Chris Dodds","doi":"10.1016/j.jcou.2024.102794","DOIUrl":null,"url":null,"abstract":"<div><p>Waste eggshells have been investigated as biomineralised CO<sub>2</sub> sorbents for the calcium looping cycle due to their high Ca content, low cost, availability, and high CO<sub>2</sub> uptake. This work investigates a novel heat-pre-treatment using eggshells as raw material. The eggshells were simultaneously calcined and thermally pre-treated via microwave heating using different powers and times whilst maintaining the same input energy in a single mode cavity reactor. The calcined eggshells were characterised using standard characterisation techniques such as TGA and isotherms of N<sub>2</sub> adsorption at 77 K. The dielectric properties were measured using the cavity perturbation technique at 2.45 GHz. Numerical electromagnetic simulations were performed using COMSOL Multiphysics and results were used to optimise the experimental setup. The treated materials were subjected to carbonation/calcination cycles in order to assess their suitability as a calcium-looping sorbent. The sorbent that exhibited a more stable CO<sub>2</sub> uptake was the one treated at the highest power (800 W) 4.5 mmol CO<sub>2</sub>/g sorbent after 20 cycles under mild calcination conditions. Adsorbents prepared at 400, 600 and 800 W displayed similar CO<sub>2</sub> uptake after 20 cycles when the calcination conditions were under more realistic conditions.</p></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":null,"pages":null},"PeriodicalIF":7.2000,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S221298202400129X/pdfft?md5=7d97d70eb3eeeff61cfdb0677d7268b3&pid=1-s2.0-S221298202400129X-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Microwave thermal pre-treatment and calcination of biomineralised sorbents for calcium looping\",\"authors\":\"María Erans , Gabriela Durán-Jimenez , José M. Rodríguez , Lee Stevens , Chris Dodds\",\"doi\":\"10.1016/j.jcou.2024.102794\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Waste eggshells have been investigated as biomineralised CO<sub>2</sub> sorbents for the calcium looping cycle due to their high Ca content, low cost, availability, and high CO<sub>2</sub> uptake. This work investigates a novel heat-pre-treatment using eggshells as raw material. The eggshells were simultaneously calcined and thermally pre-treated via microwave heating using different powers and times whilst maintaining the same input energy in a single mode cavity reactor. The calcined eggshells were characterised using standard characterisation techniques such as TGA and isotherms of N<sub>2</sub> adsorption at 77 K. The dielectric properties were measured using the cavity perturbation technique at 2.45 GHz. Numerical electromagnetic simulations were performed using COMSOL Multiphysics and results were used to optimise the experimental setup. The treated materials were subjected to carbonation/calcination cycles in order to assess their suitability as a calcium-looping sorbent. The sorbent that exhibited a more stable CO<sub>2</sub> uptake was the one treated at the highest power (800 W) 4.5 mmol CO<sub>2</sub>/g sorbent after 20 cycles under mild calcination conditions. Adsorbents prepared at 400, 600 and 800 W displayed similar CO<sub>2</sub> uptake after 20 cycles when the calcination conditions were under more realistic conditions.</p></div>\",\"PeriodicalId\":350,\"journal\":{\"name\":\"Journal of CO2 Utilization\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.2000,\"publicationDate\":\"2024-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S221298202400129X/pdfft?md5=7d97d70eb3eeeff61cfdb0677d7268b3&pid=1-s2.0-S221298202400129X-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of CO2 Utilization\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S221298202400129X\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of CO2 Utilization","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S221298202400129X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Microwave thermal pre-treatment and calcination of biomineralised sorbents for calcium looping
Waste eggshells have been investigated as biomineralised CO2 sorbents for the calcium looping cycle due to their high Ca content, low cost, availability, and high CO2 uptake. This work investigates a novel heat-pre-treatment using eggshells as raw material. The eggshells were simultaneously calcined and thermally pre-treated via microwave heating using different powers and times whilst maintaining the same input energy in a single mode cavity reactor. The calcined eggshells were characterised using standard characterisation techniques such as TGA and isotherms of N2 adsorption at 77 K. The dielectric properties were measured using the cavity perturbation technique at 2.45 GHz. Numerical electromagnetic simulations were performed using COMSOL Multiphysics and results were used to optimise the experimental setup. The treated materials were subjected to carbonation/calcination cycles in order to assess their suitability as a calcium-looping sorbent. The sorbent that exhibited a more stable CO2 uptake was the one treated at the highest power (800 W) 4.5 mmol CO2/g sorbent after 20 cycles under mild calcination conditions. Adsorbents prepared at 400, 600 and 800 W displayed similar CO2 uptake after 20 cycles when the calcination conditions were under more realistic conditions.
期刊介绍:
The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials.
The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications.
The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.