Effect of the angle of rotation of structured packing layers on separation efficiency in distillation column

The research of dimethylbenzene and butylacetate from industrial spent solvent oil by batch distillation was studied, and the batch distillation experiment was by pretreated material. The effects of separation temperature and reflux ratio on separation efficiency were investigated,and compared the new tower with the old one. The experimental results showed that: when the reflux ratio R was 3, Butyl acetate and Xylene product purity were low, the R ≥ 4, the purity of the product of Xylene and Butyl acetate were significantly increased; both yield were lower with the increase of reflux ratio. When R was 4, the top temperature of the distillation column was between 109 and 111.4 °C, before and after device upgrading, Butyl acetate product purity were 90.03% and 72.88% respectively.When the top temperature was above 120 °C, the device after upgrading Xylene product purity was 98% and 94.42% before the upgrading. Both of the purity and the yield improved after device upgrading.

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Contamination Prevention of the Sulfur Dioxide Using Structured Packing

Advanced Energy Systems ◽

10.1115/imece2002-33198 ◽

2002 ◽

Author(s):

Rosa H. Cha´vez ◽

Javier de J. Guadarrama

Keyword(s):

Mass Transfer ◽

High Efficiency ◽

Separation Efficiency ◽

Energy Content ◽

Primary Source ◽

Pollution Effects ◽

Absorption Column ◽

Atmospheric Contamination ◽

Structured Packing ◽

National Production

The atmospheric contamination is a significant problem for the population of the big cities. This problem has its origin in the burning of heavy oil, that is carried out to liberate its energy content. Its use as a primary source of energy has high pollution effects in its process due to the formation and expulsion of gases and particles as a consequence of its combustion that contaminate the atmosphere. Although it has had enough relative elements of legal type relative to the contamination, specially atmospheric contamination, there is a lack of solutions adapted to the characteristics of the problem for each country. The present work quantifies the improvements in mass transfer, using absorption column with structured packing of high efficiency for the recovery of the SO2, through the process of removal of SO2 in the form of CaSO3. For such study, the hydrodynamic and mass transfer models are used to design the column, as well as to prove different packings (national production, denominated ININ in Mexico, SulzerBX, Mellapak and Raschig) to evaluate the separation efficiency. It is discussed that the ININ packing was one of the best of those tested because it has the highest separation efficiency.

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Influence of the Cross Sectional Area of a Separation Column Using Structured Packing

Advanced Energy Systems ◽

10.1115/imece2003-43918 ◽

2003 ◽

Author(s):

Rosa H. Cha´vez ◽

Javier de J. Guadarrama ◽

Osbaldo Pe´rez ◽

Abel Herna´ndez-Guerrero

Keyword(s):

Mass Transfer ◽

Pressure Drop ◽

Separation Efficiency ◽

Cross Sectional Area ◽

Sectional Area ◽

Cross Sectional ◽

Structured Packing ◽

Separation Column ◽

Transfer Unit ◽

The Cross

In order to determine the dimension of a separation column, hydrodynamic and mass transfer models are necessary to evaluate the pressure drop and the height of the global mass transfer unit, respectively. Those parameters are a function of the cross sectional area of the column. The present work evaluates the dependency of the pressure drop and height of the global transfer unit with respect to the cross sectional area of the column, using an absorption column with high efficiency structured packing, in order to recover SO2 in the form of NaHSO3, as an example. An optimization was done applying Two Film model which is based on the number of global mass transfer units of both gas and liquid, involving the separation efficiency in terms of the height of a global transfer unit. Structured packing, geometrically heaped in a separation column, has been achieving wider acceptance in the separation processes due to their geometric characteristics that allow them to have greater efficiency in the separation processes. Three different structured packing were evaluated in this work. The results show how ININ packing is one of the packings does the best work having the highest separation efficiency because it has the lowest height of the global mass transfer unit and Mellapak packing has the largest capacity because it manages the largest liquid and gas flows. An analysis is done with respect to the pressure drop through the system for all packings considered, and a discussion is presented for each hydrodynamic and mass transfer parameter studied.

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