{"title":"氧化铜修饰的黄铁矿煤渣氧载体在化学循环燃烧中的性能提升","authors":"","doi":"10.1016/j.ijhydene.2024.09.335","DOIUrl":null,"url":null,"abstract":"<div><div>Due to the abundance of active components and low cost, pyrite cinder has great potential as an oxygen carrier in the process of chemical looping combustion (CLC). In order to improve the fuel combustion reactivity, we modified pyrite cinder with copper oxide (CuO). The addition of copper oxide could effectively increase the pore volume and oxygen vacancy concentration of pyrite cinder. The modified pyrite cinder with 20 wt% CuO possessed the highest pore volume (0.3 cm<sup>3</sup>/g) and oxygen vacancy concentration (55.61%). During the long-term redox cycles, the modified pyrite cinder samples showed higher fuel combustion reactivity than the undoped sample. The results of characterization indicated that the crystalline phases of CuO and CuFe<sub>2</sub>O<sub>4</sub> were formed in the CuO-modified pyrite cinder samples. The active components (Fe<sub>2</sub>O<sub>3</sub>, CuFe<sub>2</sub>O<sub>4</sub> and CuO) in the modified pyrite cinder samples were reduced to Fe<sub>3</sub>O<sub>4</sub>, FeO, CuFeO<sub>2</sub> and Cu during the reduction half cycle. The modified pyrite cinder with 20 wt% CuO possessed the highest CH<sub>4</sub> conversion (nearly 100%) and CO<sub>2</sub> selectivity (nearly 100%) in multiple redox testing. The CH<sub>4</sub> conversion of undoped pyrite cinder was only about 60%. When the content of CuO reached 30 wt%, surface sintering occurred for the modified pyrite cinder, resulting in the decrease of CH<sub>4</sub> conversion and surface area. After continuous redox cycles, the CuO-modified pyrite cinder samples could maintain the original crystal structure.</div></div>","PeriodicalId":337,"journal":{"name":"International Journal of Hydrogen Energy","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Enhanced performance of pyrite cinder oxygen carrier modified by CuO for chemical looping combustion\",\"authors\":\"\",\"doi\":\"10.1016/j.ijhydene.2024.09.335\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Due to the abundance of active components and low cost, pyrite cinder has great potential as an oxygen carrier in the process of chemical looping combustion (CLC). In order to improve the fuel combustion reactivity, we modified pyrite cinder with copper oxide (CuO). The addition of copper oxide could effectively increase the pore volume and oxygen vacancy concentration of pyrite cinder. The modified pyrite cinder with 20 wt% CuO possessed the highest pore volume (0.3 cm<sup>3</sup>/g) and oxygen vacancy concentration (55.61%). During the long-term redox cycles, the modified pyrite cinder samples showed higher fuel combustion reactivity than the undoped sample. The results of characterization indicated that the crystalline phases of CuO and CuFe<sub>2</sub>O<sub>4</sub> were formed in the CuO-modified pyrite cinder samples. The active components (Fe<sub>2</sub>O<sub>3</sub>, CuFe<sub>2</sub>O<sub>4</sub> and CuO) in the modified pyrite cinder samples were reduced to Fe<sub>3</sub>O<sub>4</sub>, FeO, CuFeO<sub>2</sub> and Cu during the reduction half cycle. The modified pyrite cinder with 20 wt% CuO possessed the highest CH<sub>4</sub> conversion (nearly 100%) and CO<sub>2</sub> selectivity (nearly 100%) in multiple redox testing. The CH<sub>4</sub> conversion of undoped pyrite cinder was only about 60%. When the content of CuO reached 30 wt%, surface sintering occurred for the modified pyrite cinder, resulting in the decrease of CH<sub>4</sub> conversion and surface area. After continuous redox cycles, the CuO-modified pyrite cinder samples could maintain the original crystal structure.</div></div>\",\"PeriodicalId\":337,\"journal\":{\"name\":\"International Journal of Hydrogen Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-09-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Hydrogen Energy\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0360319924040552\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Hydrogen Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0360319924040552","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Enhanced performance of pyrite cinder oxygen carrier modified by CuO for chemical looping combustion
Due to the abundance of active components and low cost, pyrite cinder has great potential as an oxygen carrier in the process of chemical looping combustion (CLC). In order to improve the fuel combustion reactivity, we modified pyrite cinder with copper oxide (CuO). The addition of copper oxide could effectively increase the pore volume and oxygen vacancy concentration of pyrite cinder. The modified pyrite cinder with 20 wt% CuO possessed the highest pore volume (0.3 cm3/g) and oxygen vacancy concentration (55.61%). During the long-term redox cycles, the modified pyrite cinder samples showed higher fuel combustion reactivity than the undoped sample. The results of characterization indicated that the crystalline phases of CuO and CuFe2O4 were formed in the CuO-modified pyrite cinder samples. The active components (Fe2O3, CuFe2O4 and CuO) in the modified pyrite cinder samples were reduced to Fe3O4, FeO, CuFeO2 and Cu during the reduction half cycle. The modified pyrite cinder with 20 wt% CuO possessed the highest CH4 conversion (nearly 100%) and CO2 selectivity (nearly 100%) in multiple redox testing. The CH4 conversion of undoped pyrite cinder was only about 60%. When the content of CuO reached 30 wt%, surface sintering occurred for the modified pyrite cinder, resulting in the decrease of CH4 conversion and surface area. After continuous redox cycles, the CuO-modified pyrite cinder samples could maintain the original crystal structure.
期刊介绍:
The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc.
The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.