河北工业科技2025，Vol.42Issue(4)：383-389,400,8.DOI:10.7535/hbgykj.2025yx04009
HY分子筛蜂窝胚体制备及其对VOCs吸附特性研究
Preparation of HY molecular sieve honeycomb monolith and its adsorption characteristics for VOCs
摘要
Abstract
To meet the demand for efficient purification of high-volume and low-concentration volatile organic compounds(VOCs),HY molecular sieve honeycomb monolith were prepared using a solid-loading method.Key parameters including binder type,dispersant content,and slurry solid concentration were optimized through characterization techniques like SEM,XRD,BET surface area analysis,and FTIR spectroscopy.On this basis,the effects of different adsorption conditions such as solid-loading amount,inlet VOC concentration,and feed gas space velocity on the adsorption performance of the HY molecular sieve honeycomb monolith were investigated.Kinetic modeling was applied to fit and validate the findings.The results indicate that:1)The optimal preparation conditions for HY molecular sieve honeycomb monolith involve a slurry comprising 10 wt%silica sol,0.4 wt%polyacrylic acid,and 22 wt%HY zeolite solids,followed by a two-step solid-loading process;2)The resultant monoliths prepared under optimal conditions exhibit a specific surface area of 343.54 m2/g,an average pore diameter of 4.16 nm,intact zeolite crystal structure,and no residual organic matter;3)The optimal adsorption capacity for o-xylene is achieved at a solid-loading of 120 g/L.Emission standards can be met when the inlet VOC mass concentration is below 600 mg/m3 and the space velocity is≤4 s-1;4)The Yoon-Nelson model can effectively simulate the adsorption behavior of HY molecular sieve honeycomb of VOCs inlet gas,with the half-breakthrough time τ and rate constant k'being 34.95 min and 0.076 8 min-1,respectively.The theoretical predictions show good agreement with experimental data,exhibiting a minor deviation of only 3.49%.The molecular sieve rotor honeycomb monolith prepared via the optimized solid loading method exhibits favorable adsorption efficiency for VOCs,demonstrating promising application prospects in the field of volatile organic compounds removal.关键词
无机非金属基复合材料/分子筛/转轮吸附/VOCsKey words
inorganic nonmetallic matrix composites/molecular sieve/rotor adsorption/VOCs分类
资源环境引用本文复制引用
张向京,范朝阳,徐晓阳,刘宇峰,任鹏..HY分子筛蜂窝胚体制备及其对VOCs吸附特性研究[J].河北工业科技,2025,42(4):383-389,400,8.基金项目
河北省重大科技成果转化专项(22293701Z) （22293701Z）
河北省高等学校科学研究专项(产学研)项目(CXY2024008) （产学研）
石家庄市重点研发及中小企业创新计划项目(231240013A) （231240013A）
