Application of NO Adsorption and Desorption with ZrO2-based Adsorbents

• Main Authors: Wang, Changming, 王昶茗
• Other Authors: Wang, Chenbin
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/22139703203529971468

碩士 === 國防大學理工學院 === 化學工程碩士班 === 100 === Application of zirconia-based adsorbents modified with alkali (Li, Na, K) or alkaline earth (Mg, Ca) metal oxides have been investigated. Five adsorbents (LiZr4, NaZr4, KZr4, MgZr4, and CaZr4) are prepared by sol-gel method. The preliminary results of CO2-TPD show that MgZr4 and CaZr4 adsorbents present better basicity. NO TPD-MS spectrum shows one main desorption temperature of MgZr4 and CaZr4 at 195 ℃ and 170 ℃. Further, various contents of MgO and CaO modified zirconia-based adsorbents were designed. Also, modification of adsorbents with dyes (phenolphthalein and methyl-violet) are compared to obtain the color-sensitive adsorbent. Among these adsorbent, the MgZr4 adsorbent modified with phenolphthalein shows the best effect on the discolor for the NO adsorption: the color changes from pink to yellow. It can judged easily for the operator to distinguish the presence of NO in a space to approach the effect of initial protection.