Preparation of sintering-resistant thermochemical energy storage materials from zinc sol–modified carbide slag

IF 5.9 3区工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of Industrial and Engineering Chemistry Pub Date : 2025-01-15 DOI:10.1016/j.jiec.2025.01.019

Yuan Zhang , Caiyun Gao , Xiangli Liu , Dong Li , Fei Jin

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Abstract

Carbide slag is an industrial solid waste with a high calcium content. This study prepared a novel CaO–ZnO composite thermochemical energy storage material by mixing carbide slag slurry with ZnO sol and investigated the effects of the ZnO doping amount, pH, and thermal pretreatment process on the energy storage performance of the as-formed materials. The results indicate that when the CaO:ZnO molar ratio is 8:1, the thermochemical energy storage performance of the CaO–ZnO composite material is optimal. The energy storage performance of SG-CZ8-850-1, which was obtained under the heat pretreatment conditions of 850 ℃ and 1 h, remained stable with an effective conversion rate and energy storage density of 0.35 and 1112 kJ·kg⁻¹, respectively, after 20 cycles. Thus, ZnO doping can effectively increase the reaction rate of carbide slag during carbonation and improve the cycling stability of thermochemical energy storage materials.

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锌溶胶改性电石渣制备耐烧结热化学储能材料

电石渣是一种含钙量高的工业固体废物。本研究将电石渣浆与ZnO溶胶混合制备了一种新型的CaO-ZnO复合热化学储能材料，并研究了ZnO掺杂量、pH和热预处理工艺对成型材料储能性能的影响。结果表明，当CaO:ZnO摩尔比为8:1时，CaO - ZnO复合材料的热化学储能性能最佳。在850℃和1 h的热处理条件下，SG-CZ8-850-1的储能性能在循环20次后保持稳定，有效转化率和储能密度分别为0.35和1112 kJ·kg−1。由此可见，ZnO掺杂可以有效提高碳化过程中电石渣的反应速率，提高热化学储能材料的循环稳定性。

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来源期刊

Journal of Industrial and Engineering Chemistry 工程技术-工程：化工

CiteScore

10.40

自引率

6.60%

发文量

639

审稿时长

29 days

期刊介绍： Journal of Industrial and Engineering Chemistry is published monthly in English by the Korean Society of Industrial and Engineering Chemistry. JIEC brings together multidisciplinary interests in one journal and is to disseminate information on all aspects of research and development in industrial and engineering chemistry. Contributions in the form of research articles, short communications, notes and reviews are considered for publication. The editors welcome original contributions that have not been and are not to be published elsewhere. Instruction to authors and a manuscript submissions form are printed at the end of each issue. Bulk reprints of individual articles can be ordered. This publication is partially supported by Korea Research Foundation and the Korean Federation of Science and Technology Societies.