浸渍溶液对Pt/PTFE/泡沫SiC规整疏水催化剂性能的影响

何建超; 王和义; 肖成建; 李佳懋; 侯京伟; 夏修龙

doi:10.11889/j.0253-3219.2016.hjs.39.110301

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浸渍溶液对Pt/PTFE/泡沫SiC规整疏水催化剂性能的影响

核化学、放射化学、放射性药物和核医学 | 更新时间：2021-05-24

- 浸渍溶液对Pt/PTFE/泡沫SiC规整疏水催化剂性能的影响
- Influence of impregnation solution on the performance of Pt/PTFE/foam-SiC-structured hydrophobic catalyst
- 核技术 2016年39卷第11期文章编号：110301
- 作者机构：
  
  中国工程物理研究院核物理与化学研究所绵阳 621900
- 作者简介：
  
  [ "何建超,男,1989年出生,2012年毕业于中国海洋大学,现为硕士研究生,核燃料循环与材料专业", "HE Jianchao, male, born in 1989, graduated from Ocean University of China in 2012, master student, major in nuclear fuel cycle and material" ]
  王和义,E-mail:hywang@caep.cn WANG Heyi, E-mail: hywang@caep.cn
- 基金信息：
- DOI：10.11889/j.0253-3219.2016.hjs.39.110301
  中图分类号： TL944
- 收稿日期：2016-04-21，
  
  修回日期：2016-05-24，
  
  纸质出版日期：2016-11
- 稿件说明：
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何建超, 王和义, 肖成建, 等. 浸渍溶液对Pt/PTFE/泡沫SiC规整疏水催化剂性能的影响[J]. 核技术, 2016,39(11):110301

Jianchao HE, Heyi WANG, Chengjian XIAO, et al. Influence of impregnation solution on the performance of Pt/PTFE/foam-SiC-structured hydrophobic catalyst[J]. Nuclear techniques, 2016, 39(11): 110301
何建超, 王和义, 肖成建, 等. 浸渍溶液对Pt/PTFE/泡沫SiC规整疏水催化剂性能的影响[J]. 核技术, 2016,39(11):110301 DOI： 10.11889/j.0253-3219.2016.hjs.39.110301.

Jianchao HE, Heyi WANG, Chengjian XIAO, et al. Influence of impregnation solution on the performance of Pt/PTFE/foam-SiC-structured hydrophobic catalyst[J]. Nuclear techniques, 2016, 39(11): 110301 DOI： 10.11889/j.0253-3219.2016.hjs.39.110301.

摘要

Pt/PTFE/泡沫SiC规整疏水催化剂可用于氢-水液相催化交换反应（Liquid-phase catalytic exchange process，LPCE）进行水去氚化（Water detritiation system，WDS）。为研究浸渍溶液对该催化剂性能的影响，以丙酮、乙二醇、无水乙醇分别配制不同的氯铂酸-有机溶液，直接浸渍具有疏水性的PTFE/泡沫SiC，250℃气相还原，从而制备Pt/PTFE/泡沫SiC规整疏水催化剂。利用X射线衍射分析（X-ray diffraction，XRD）、X射线光电子能谱分析（X-ray photoelectron spectroscopy，XPS）、透射电子显微镜（Transmission electron microscope，TEM）等表征手段分析所得催化剂的结构与组成，并研究其氢-水液相催化交换性能。三种催化剂的平均粒径分别为9.3 nm、3.6 nm、6.8 nm，乙二醇对Pt粒子有保护作用，得到的平均粒径最小。Pt存在Pt（0）、Pt（II）和Pt（IV）三种价态，氯铂酸-乙醇和氯铂酸-乙二醇制备的催化剂中0价态均为主要价态，Pt（0）比例分别为47.60%和43.97%，氯铂酸-丙酮制备的催化剂中4价态为主要价态。根据LPCE性能测试结果，氯铂酸-乙二醇制备的催化剂柱效率最高，说明催化剂中Pt（0）价态比例接近时，Pt粒子粒径大小对氢-水液相催化交换反应的影响更明显。揭示乙二醇为优选溶剂。

Abstract

Background

Pt/PTFE/foam-SiC-structured hydrophobic could be used for a water detritiation system (WDS)

via

a liquid-phase catalytic exchange process (LPCE).

Purpose

To study the influence of impregnation solution on the performance of this catalyst

acetone

ethylene glycol and ethanol were chosen as the solvent to prepare Pt-organic solution

respectively.

Methods

The catalysts were prepared by impregnation method with the above three different solutions. The as-prepared catalysts were characterized by X-ray diffraction (XRD)

X-ray photoelectron spectroscopy (XPS)

Transmission electron microscope (TEM)

etc

. Moreover

their catalytic activity for LPCE was tested.

Results

The average particle sizes of Pt particles of the three different catalysts were 9.3 nm

3.6 nm and 6.8 nm

respectively. The catalyst prepared by chloroplatinic acid-ethylene glycol had the smallest average particle size

because ethylene glycol would protect Pt particles. Three valences

Pt(0)

Pt(II) and Pt(IV) existed in these catalysts

and Pt(0) was the key for catalytic isotope exchange. Pt(0) was the main valences in the catalysts prepared by chloroplatinic acid-ethanol and chloroplatinic acid-ethylene glycol

and the proportion were 47.60% and 43.97%

respectively. Pt(IV) was the main valence in the catalyst prepared by Chloroplatinic acid-acetone. According to the results of LPCE

the catalyst prepared by chloroplatinic acid-ethylene glycol had the highest column efficiency.

Conclusion

The results meant that when the proportions of Pt(0) are close

the Pt particle size was the main factor of influence on LPCE. Thus

ethylene glycol is the best solvent.

关键词

Keywords

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