Maddox

J. V. Maddox, iu S. B. Viuson and R. L. Metcalf, eds.. Entomology Serving Society Emerging Technologies and Challenges, Entomology Society of America, Lanham, Md., 1991, p. 356. 

R. N. Maddox, Gas andUquid Sweetenings 2nd. ed., Campbell Petroleum Series, John M. Campbell, Norman, OMa., 1974. 

Hines and Maddox, Mass Transfer Fundamentals and Applications, Prentice Hall, 1985. 

The recommended method to use to determine the actual theoretical stages at an actual reflux ratio is the Erbar/Maddox relationship. In the graph, N is the theoretical stages and R is the actual reflux ratio L/D, where L/D is the molar ratio of reflux to distillate. N, is the minimum theoretical stages and R, is the minimum reflux ratio. 

The author has curve-fit the Erbar/Maddox curves since readability for the graph is limited. For simplicity, let ... 

Maddox, R. N., Gas and Liquid Sweetening, Campbell Petroleum Series, 1977. 

For stringent specifications of outlet H2S or CO2, special designs or a two-stage process may be required. Maddox states that a two-stage process would typically be used for acid gas feed concentrations of 20-40%. Maddox gives the following rules of thumb for process flow scheme selection ... 

Maddox shows how the major process concerns of corrosion, erosion, and column instability must be met in the design and operation of a hot carbonate process. These items will impact the capital and operating/main-tenance costs. 

An alternate improved solution for Underwood s method is given by Erbtir, Joyner, and Maddox [113] with an example, which is not repeated here. 

There are several valuable references to developing and applying a multicomponent distillation program, including Holland [26, 27,169], Prausnitz [52, 53], Wang and Henke [76], Thurston [167], Boston and Sullivan [6], Maddox and Erbar [115], and the pseudo-K method of Maddox and Fling [116]. Convergence of the iterative trials to reach a criterion requires careful evaluation [114]. There are sever-... 

Najjar, Bell, and Maddox studied the influence of physical property data on calculated heat transfer film coefficients and concluded that accurate fluid property data is extremely important when calculating heat transfer coefficients using the relationships offered by Dittus-Boelter, Sieder-Tate, and Petukhov. Therefore, the designer must strive to arrive at good consistent physical/thermal property data for these calculations. 

---