高壓環境下沸石13X吸附與脫附的熱質傳研究

Heat and Mass Transfer Studies Under High Pressure Adsorption and Desorption of Zeolite 13X

翁淩家 ； 張能傑 ； 曾鵬樟 ； 王啟川

《冷凍空調與能源科技雜誌》 85期 (2014/02) Pp. 27-38

摘要

本研究主要在常壓1大氣壓與高壓7.5大氣壓下進行單一平行板通道之二維吸附與脫附模擬。由於本研究所使用的模擬工具為套裝軟體Comsol 4.0，模擬過程必須耦合不同物理模式包含有自由與多孔介質流、多孔介質中的熱傳、流體中的熱傳以及稀物質傳遞，因此本文亦根據所選用之物理模式蒐集並整理其物理意義與相關數學方程式。本研究取總飽和吸附水量90%的吸附時間為參考，即1atm下，吸附時間為10684秒；7.5atm下的吸附時間則為10152秒。而本模擬脫附加熱的方式就是在吸附層底部做均勻等溫加熱至100℃。在1atm下，脫附時間2714秒後就可以達到完全再生的目的，而其脫附曲線仍未趨近平緩。在7.5atm下則進行為時10800秒的脫附再生，其脫附曲線已趨於平緩，然而脫附的水量卻沒超過原先吸附進來的水量，結果顯示高壓脫附的時間比常壓脫附的時間要多了3倍。

關鍵字

高壓 ； 吸附與脫附 ； 沸石13X

並列摘要

This study focuses on the two-dimensional simulation of adsorption and desorption of a single parallel plate channel under the pressure of 1atm and 7.5atm high pressure. As the simulation tools used in this study is the package Comsol 4.0, must be coupled simulation models contain different physical freedom and flow in porous media, porous medium heat transfer, heat transfer fluids and lean mass transfer, and therefore also in accordance with this article the choice of a physical model to collect and organize their physical meaning associated with mathematical equations.In this study, the adsorption time to take 90% of the total adsorption of water as a reference, that 1atm, the adsorption time is 10,684 seconds; adsorption time 7.5atm compared ti 10,152 seconds under. And the way of heating is simulated desorption adsorption layer at the bottom was heated to make the temperature uniform like 100C. In 1atm, the system can be achieved complete regeneration purposes after desorption's time of 2714 seconds, and not reaching desorption curves gently. In 7.5atm conducted under the last 10,800 seconds of desorption regeneration, the desperation curve has leveled off, but the water did not exceed the desperation of absorbed water originally came in, showed high pressure desorption time than atmospheric pressure desperation time to three times more.

並列關鍵字

high pressure ； adsorption and desorption ； Zeolite 13X