{"title":"Catalytic Effect of Iron and Titanium on the Microstructure and Properties of Biopitch Anodes","authors":"Wei Wang, Kunmo Zhang, Guoling Zhang, Hao Zhang","doi":"10.1007/s40831-024-00901-7","DOIUrl":null,"url":null,"abstract":"<p>The influence of catalyst on the physical properties and CO<sub>2</sub> reactivity of carbon anodes after baking has been investigated in this paper. Raman spectra and X-ray diffraction patterns show that there is more well-ordered structure in carbon anodes with iron and titanium additives. The metal additives promote the crystalline size of graphite and graphitization extent. The appearance of the interaction between various pitch and coke surface is revealed by the optical microscopy. Gasification induces the anodes disordering to some extent. A detailed investigation indicates that there is a close relationship between the microstructure and anode properties. Owing to the improvement of graphitization extent, the properties of biopitch anodes with metal additives are better than that of conventional coal-tar-pitch samples, which can mitigate the adverse impact of its low coking value and amorphous structure on the density of the anodes. The catalytic graphitization mechanism is proposed for the transition of amorphous carbon to graphite structure at a lower temperature. The results indicate that the biopitch anodes with iron and titanium as catalysts are promising for potential application. This study proposes a green method for designing a high coking value carbon anode with biopitch as a binder by catalytic graphitization.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":17160,"journal":{"name":"Journal of Sustainable Metallurgy","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sustainable Metallurgy","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s40831-024-00901-7","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The influence of catalyst on the physical properties and CO2 reactivity of carbon anodes after baking has been investigated in this paper. Raman spectra and X-ray diffraction patterns show that there is more well-ordered structure in carbon anodes with iron and titanium additives. The metal additives promote the crystalline size of graphite and graphitization extent. The appearance of the interaction between various pitch and coke surface is revealed by the optical microscopy. Gasification induces the anodes disordering to some extent. A detailed investigation indicates that there is a close relationship between the microstructure and anode properties. Owing to the improvement of graphitization extent, the properties of biopitch anodes with metal additives are better than that of conventional coal-tar-pitch samples, which can mitigate the adverse impact of its low coking value and amorphous structure on the density of the anodes. The catalytic graphitization mechanism is proposed for the transition of amorphous carbon to graphite structure at a lower temperature. The results indicate that the biopitch anodes with iron and titanium as catalysts are promising for potential application. This study proposes a green method for designing a high coking value carbon anode with biopitch as a binder by catalytic graphitization.
本文研究了催化剂对碳阳极烘烤后的物理性质和二氧化碳反应性的影响。拉曼光谱和 X 射线衍射图显示,添加铁和钛的碳阳极具有更有序的结构。金属添加剂促进了石墨的结晶尺寸和石墨化程度。光学显微镜显示了各种沥青与焦炭表面之间的相互作用。气化在一定程度上引起了阳极的紊乱。详细研究表明,微观结构与阳极特性之间存在密切关系。由于石墨化程度的提高,添加了金属添加剂的生物沥青阳极的性能优于传统的煤焦油沥青样品,从而减轻了其低结焦值和非晶结构对阳极密度的不利影响。提出了在较低温度下无定形碳向石墨结构转变的催化石墨化机制。结果表明,以铁和钛为催化剂的生物沥青阳极具有良好的应用前景。本研究提出了一种通过催化石墨化设计以生物沥青为粘合剂的高结焦值碳阳极的绿色方法。
期刊介绍:
Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.