氟气纯化用氟化钠吸附剂制备及其吸附性能研究
Preparation and Adsorption Performance of Sodium Fluoride Adsorbent for Fluorine Gas Purification
丁勇 1李權 1高超 1罗艳 1杨郭 2邢波2
作者信息
- 1. 四川红华实业有限公司 ,四川 乐山 614200
- 2. 四川轻化工大学, 四川 自贡 643000
- 折叠
摘要
氟化钠(NaF)因对氟气(F2)中氟化氢(HF)具有优异的选择性吸附性能,且能再生循环使用,已被广泛应用于F2 纯化工艺中.然而目前NaF吸附剂普遍存在强度差、孔隙率低、粉化严重等问题,难以满足制备高品质F2 的技术要求.针对上述问题,本文提出了一种基于黏合剂改性成型法和原位高温煅烧造孔法的新型NaF吸附剂制备工艺,并以NaF吸附剂的成型效果、机械强度、残碳量和微观形貌作为评价指标,确定了最佳吸附剂合成工艺条件.所制备NaF吸附剂机械强度为5.56 MPa/m2,比表面积为4.3 m2/g,活化 10次后粉化率仅为 9.2%,HF吸附容量可达431 mg/g NaF,相比于现有市售同类产品,具有较好的应用效果.
Abstract
Sodium fluoride(NaF)has been widely used in F2 purification processes due to its excellent selective adsorption performance for hydrogen fluoride(HF)in fluorine gas(F2)and its ability to regenerate and recycle.However,currently NaF adsorbents generally suffer from problems such as poor strength,low porosity,and severe pulverization,making it difficult to meet the technical requirements for preparing high-quality F2.In response to the above issues,this article proposes a new NaF adsorbent preparation process based on adhesive modification molding method and in-situ high-temperature calcination pore formation method.The optimal adsorbent synthesis process conditions are determined based on the molding effect,mechanical strength,residual carbon content,and microstructure of NaF adsorbent as evaluation indicators.The mechanical strength of the prepared NaF adsorbent is 5.56 MPa/m2,with a specific surface area of 4.3 m2/g.After 10 activations,the pulverization rate is only 9.2%,and the HF adsorption capacity can reach 431 mg/g.Compared with similar products available on the market,NaF has better application effects.
关键词
氟化钠/吸附剂/氟气纯化/制备工艺/吸附性能Key words
sodium fluoride/adsorbent/fluorine purification/preparation process/adsorption performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据