شماره ركورد كنفرانس :
5048
عنوان مقاله :
Study of influential parameters on H2S conversion efficiency of LO-CAT bubble column reactors: a statistical approach
Author/Authors :
Negahdar ،Hosseinpour School of Chemical Engineering - University of Tehran - Tehran, Iran , Shohreh ،Fatemi School of Chemical Engineering - University of Tehran - Tehran, Iran
كليدواژه :
LO-CAT process , Central composite design , H2S removal , Design of experiments , Bubble column reactors
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
LO-CAT is one of the best and economical processes commonly used for removal of hydrogen sulfide from lean-H2S
acid gases. Prediction of H2S conversion efficiency in LO-CAT bubble columns is of great importance for design and
scale up of these types of reactors. Effects of four factors including gas and liquid superficial velocities through the
bubble column, the concentration of Fe3+ in solution entering the reactor, and feed gas H2S content on the H2S
conversion efficiency of the LO-CAT reactors are investigated by the method of central composite orthogonal design
(CCOD) of experiments. The reactor performance has been previously formulated using the mixing cell model. This
mathematical model is used for prediction of H2S conversion in the reactor at different operating conditions constructed
based upon the CCOD. Analysis of variance (ANOVA) is employed to study the signification of the four mentioned
factors and their interactions. A statistical model including the main factors and their binary interactions is proposed for
the H2S conversion in the reactor. It is found that H2S conversion efficiency of the reactor is considerably enhanced by
the Fe3+ concentration in the entering solution; however, the conversion is sharply suppressed by the feed gas superficial
velocity in the reactor. In addition, a reasonable curvature is observed for the H2S removal as a function of the liquid
superficial velocity. Furthermore, as compared to the other three factors, H2S content of the feed gas has a lesser effect
on the performance of the reactor.