余政靖2006-07-252018-06-282006-07-252018-06-282005http://ntur.lib.ntu.edu.tw//handle/246246/9414本計劃的工作，在探討迴流系統含有絶熱塞狀式雙 分子反應器之設計與控制問題。雖然本研究是利用理論 的方式進行，但其化學及系統流程相當接近真實的工 廠，如：異構化，甲醇，氨，苯等製程。利用簡化的TAC 方程式求得最適的反應物分佈，以及系統之動力學及熱 力學對於迴流系統所帶來的影響。並利用簡化模式，解 析反應器之操作溫度對系統的操作度影響。其結果顯 示，在恆溫及絶熱操作下，其產能會受到迴流量的變化 而有所影響。對於可操作度分析，在此提出2 個控制結 構，及3 種不同的產能調結的方式。此研究的結果顯示， 當系統操作在反應物入料濃度相等時，應選用反應器入 口溫度來作為產能調協變數，且應固定反應器入口2 個 反應物之濃度。當反應物之濃度相差較大時，則應選用 迴流量來控制系統之產能。In this work, the design and control problem of recycle processes with a bimolecular reaction taking place in an adiabatic tubular reactor is explored. Although hypothetical components are used in this paper, the chemistry and the flowsheets are similar for a very large number of real industrial processes, e.g., production of isooctane, amines, methanol, ammonia, ethyl-benzene, etc. Optimal reactant distribution can be obtained directly form the simplified TAC equation and effects of kinetics parameters and relative volatilities on this optimality are also explored. Next the connection between reactor temperature and operability is established analytically for the simplified process. It reveals the important difference between isothermal and adiabatic operations, especially for the reversal in production rate variation as the recycle flow changes. For the operability analysis, two control structures are proposed with three different combinations of TPM. For the case of equally distributed reactant, the control structure using the reactor inlet temperature as TPM gives good control performance when the reactant distribution is held constant. For the case of biased reactant distribution, the reactant redistribution provides an extra degree of freedom and this alleviates the high Tout problem. The results presented in this work clearly indicate that simple material and energy balances provide useful insights in the design and control of recycle processes.application/pdf150904 bytesapplication/pdfzh-TW國立臺灣大學化學工程學系暨研究所reporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/9414/1/932214E002013.pdf