309-m2 - KING FAH D UNIVERSITY OF PETROLEUM & M...

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Unformatted text preview: KING FAH D UNIVERSITY OF PETROLEUM & M INERALS CHEM I CAL ENGI NEERI NG DEPART M ENT CHEMICAL ENGINEERING LAB I CHE-309 Pr epa r ed For M r. G.O. Y ahya EX P # M 2 ph y si ca l g a s a b s or pt i on i n a pa ck ed-col umn a b sor b er DONE BY: Al-Ghamdi, Kamal S. ID# : 901432 Sec.# : 08 PARTNER: Al-Taweel, Abdulsalam ID# :925367 GROUP # IA D a t e Of P e r f or m a n ce : 2 1 - 5 - 1 9 9 6 D a t e Of Su b m i ssi on : 2 8 - 5 - 1 9 9 6 ABSTRACT: This report presents and discusses an experiment to study the unit operation of gas absorption in a randomly packed column. Moreover, determining the volumetric mass transfer coefficients. There are many variables were obtained in this experiment, for example, in the first run the following were obtained:- U L was 1.67E-5 m 3 /s L was 5.26E-3 m/s q was 2.77E-7 kmol/s (k L a) exp was 0.016989 s-1 (k L a) thr was 0.0139 s-1 Error was 22.45% (H L ) exp was 0.3098 m (H L ) thr was 0.3711 m Error was 16.54% INTRODUCTION: A packed-column is a type of apparatus that is used mostly for gas absorption duties. The packed consists mainly of a cylindrical column filled with some suitable packing material, e.g. Berl saddles. The liquid flows from the top of column going down through the openings of packings. The gas, however, may flow counter-current or co-current. A contact area is provided for contacting the liquid with the gas. This contact area depends upon the size and the kind of the packings. By measuring the flow rate of the inlet and outlet gas at different rates, the volumetric mass transfer, k L a can be determined. THEORETICAL BACKGROUND: There are two resistances k L and k G against the interface mass transfer. In this experiment, pure CO 2 is used, so there is only liquid phase resistance:- ( 29 R k C C L = - * (1) The volumetric liquid side mass transfer coefficient is calculated as follows:- (2) where, q u C L o = so, k a L H C C C q u L i L =-- ln * * The data is often reported in terms of a height of a transfer unit:- P HeC = * Empirical correlations are used to correlate the experimental data:- (3) and,...
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309-m2 - KING FAH D UNIVERSITY OF PETROLEUM & M...

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