AgY对碘的吸附能力及吸附机理研究

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-11-12 DOI:10.1080/00223131.2023.2276397

Cheng Zhang, Zexiang Chen, Jianrong Hou, Hongzheng Ren, Zhen Wang, Xin Li, Yongguo Li, Haixia Kong, Haifeng Yu, Jie Yu

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引用次数: 0

摘要

摘要为了系统研究Ag离子交换型NaY分子筛(AgY)对碘化甲酯(CH3I)的吸附性能及吸附机理，选择了不同Ag含量的AgY吸附剂。当渗透CH3I浓度达到1‰和100%时，16.6% AgY可储存150 mg/g和275 mg/g的CH3I。透射电镜和能谱分析结果表明，银的分散性与吸附CH3I的能力密切相关。稳定的AgI络合物的形成使AgY对CH3I的吸附机理合理化。与AgX相比，通过FT-IR、SEM和XRD验证了AgY具有较强的耐酸性能。采用正交试验设计，考察了温度、湿度和气速三个关键参数对CH3I吸附的影响。实验结果表明，AgY在高温、低湿、低流量条件下具有较好的除碘性能。为16.6%AgY在乏燃料后处理装置的进一步工程应用提供了技术参考。本研究得到国家国防科技工业局(ky2007)和国家自然科学基金(U1967215)的支持。披露声明作者未报告潜在的利益冲突。本研究得到国家自然科学基金资助[U1967215];国家国防科技工业局[ky2007]。

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Study on iodine adsorption capacity and adsorption mechanism of AgY

ABSTRACTTo systematically study the methyl iodide (CH3I) adsorption performance and adsorption mechanism of Ag ion exchange NaY zeolite (AgY), AgY adsorbents with different Ag content were selected. 16.6% AgY was capable of storing 150 mg/g and 275 mg/g of CH3I when the penetrated CH3I reached 1‰ and 100% inlet concentration. TEM and EDS results presented a high relationship between Ag dispersion and CH3I adsorption capability. The formation of a stable AgI complex rationalized the CH3I adsorption mechanism on AgY. Compared to AgX, AgY was verified to possess a strong acid resistance by FT-IR, SEM and XRD. The effect of three key parameters (temperature, humidity and gas velocity) on CH3I adsorption was carefully investigated by orthogonal experiment design. The experimental results showed that AgY had better iodine removal performance at a high temperature, low humidity, and low flow rate. This work provides technical reference for further engineering applications of 16.6%AgY in spent fuel reprocessing plants.KEYWORDS: Zeolitespent fuelradioactive iodineadsorption AcknowledgementThis research was supported by the State Administration of Science, Technology and Industry for National Defence (KY20007) and the National Natural Science Foundation of China (U1967215).Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by the the National Natural Science Foundation of China [U1967215]; the State Administration of Science, Technology and Industry for National Defense [KY20007].

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.