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EFFECT OF BACKGROUND REACTANT GRADIENT ON TRACER DISPERSION:A CASE STUDY OF IMPULSE INJECTION OF REACTANT INTO AN OPEN REACTOR

EFFECT OF BACKGROUND REACTANT GRADIENT ON TRACER DISPERSION: A CASE STUDY OF IMPULSE INJECTION OF REACTANT INTO AN OPEN REACTOR
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摘要 The paradox is well known that the residence time distribution(RTD)is not valid forthe estimation of the conversion of a first order reaction in an open tubular reactor.A casc ofδ injection of reactive species into an open flow system is investigated theoretically in this paper.The analytical solution with the Laplace transform demonstrated that the conversion of a first orderreaction is identical to that in a closed reactor under steady state.The effect of the backgroundreactant concentration gradient addressed by the authors in a previous paper was employed to thiscase.and the numerical solution of the tracer dispersion based on this novel argument gave rise to asimilar value of conversion.suggesting the validity of the concept and the significance of the subtledifference between RTDs determined with or without the presence of a background reactant in anopen flow system. The paradox is well known that the residence time distribution (RTD) is not valid Tor the estimation of the conversion of a first order reaction in an open tubular reactor. A case of (5 injection of reactive species into an open flow system is investigated theoreticaly in this paper. The analytical solution with the Laplace transform demonstrated that the conversion of a first order reaction is identical to that in a closed reactor under steady state. The effect of the background reactant concentration gradient addressed bthe authors in a previous paper was employed to this case, arid the numerical solution ot the 1 racer dispersion based on this novel argument gave rise to a similar value of conversion, suggesting the validity of the concept and the significance of the sublle difference between RTDs determined with or without the presence of a background reactant in an open How system.
出处 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 1995年第3期24-33,共10页 中国化学工程学报(英文版)
关键词 axial DISPERSION model OPEN REACTOR RESIDENCE time distribution EFFECT of BACKGROUND reactant axial dispersion model, open reactor, residence time distribution, effect of background reactant
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