Chemical Reaction Engineering Space time equals the mean residence time For narrow diameter tubular reactor For CSTR For large diameter tubular reactor When the density of the reaction mixture is constant For narrow diameter tubular reactor For CSTR For large diameter tubular reactor When the density of the reaction mixture is constant ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate - rA0 is invariant with total pressure. The rate controlling step is Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase Surface reaction between absorbed A and absorbed B Surface reaction between A in the gas phase and absorbed B Desorption of C Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase Surface reaction between absorbed A and absorbed B Surface reaction between A in the gas phase and absorbed B Desorption of C ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering Fluidised bed reactor is characterised by Comparatively smaller equipment Absence of continuous catalyst regeneration facility Uniformity of temperature Very small pressure drop Comparatively smaller equipment Absence of continuous catalyst regeneration facility Uniformity of temperature Very small pressure drop ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If the pore diffusion controls in a catalytic reaction, the apparent activation energy Ea is equal to ED/2 (E + ED) where ED is activation due to diffusion The intrinsic activation energy E (E + ED)/2 ED/2 (E + ED) where ED is activation due to diffusion The intrinsic activation energy E (E + ED)/2 ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering If pore diffusion is the controlling step in a solid catalysed reaction, the catalyst Porosity is of less importance None of these Porosity is very important Internal surface area is utilised efficiently Porosity is of less importance None of these Porosity is very important Internal surface area is utilised efficiently ANSWER DOWNLOAD EXAMIANS APP
Chemical Reaction Engineering A stirred tank reactor compared to tubular-flow reactor provides Higher overall selectivity for a first order consecutive reaction Permits operation at the optimum temperature for a long reaction time More uniform operating conditions All of these Higher overall selectivity for a first order consecutive reaction Permits operation at the optimum temperature for a long reaction time More uniform operating conditions All of these ANSWER DOWNLOAD EXAMIANS APP
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