An irreversible chemical reaction occurs on a porous catalyst. All the pores are of same size. In strong pore diffusion regime, the observed activation energy is 120kJ mol−1. The activation energy of diffusion is 10kJ mol−1. Assuming Arrhenius temperature dependency for both reaction and diffusion, which one of the following is the true activation energy (in kJ mol−1) of the reaction?
Consider a homogeneous gas phase reaction, A+2B→2C+3D occurring at constant temperature and pressure in a varying volume batch reactor. The vessel is initially charged with 50 moles of A and 150 moles of B. The gases behave ideally. For complete conversion of A, the ratio of the final volume to the initial volume is ______ (rounded off to one decimal place).
Consider the following homogeneous isothermal liquid-phase parallel reactions carried out in three reactor configurations (having identical volumes and same operating temperatures), as shown in the figure.
A+B→D (Desired, rD=k1CACB)
A+B→U (Undesired, rU=k2CA2CB)
Assuming plug flow behavior, at steady state, which one of the following statements is CORRECT?
The reaction rate constants of two reactions follow Arrhenius' law. The activation energies of Reaction 1 and Reaction 2 are E1 and E2, respectively and E1<E2. Assuming same value for the frequency factor for both the reactions, which one of the following statements is CORRECT?
A first-order homogeneous liquid-phase reaction (A→B) occurs in an adiabatic, ideal mixed flow reactor operating at steady state. The volumetric flow rate of the feed is 4L min−1 and volume of the reactor is 20L. At the reactor temperature of 500 K, the reaction rate constant is 1min−1, and heat of reaction is −20kcal mol−1. The average heat capacity of the feed as well as the reaction mixture in the temperature range of interest is 0.3kcal mol−1∘K−1 (assuming concentration/density parameters appropriately). At the inlet, the feed temperature (in K) is ______ (rounded off to one decimal place).
A first-order homogeneous liquid-phase reaction (A→B) occurs in a non-ideal isothermal reactor operating at steady state. The variance (σ2) of residence time distribution (RTD) from a pulse tracer experiment is 4min2. The volumetric flow rate of the feed is 5L min−1 and volume of the reactor is 25L. The reaction rate constant is 0.4min−1. Based on the tanks-in-series model, the conversion (in %) is ______ (rounded off to one decimal place).
Choose the CORRECT statement that describes the dependence of the variance (σΘ2) of the residence time distribution (RTD) with respect to the number of tanks (n) in the Tanks-in-Series model of non-ideal reactors.
Consider an enzymatic reaction that follows Michaelis-Menten kinetics. Let KM, S, and Vmax denote constants. Which of the following statements is/are TRUE?
The catalytic gas phase reaction A→products is carried out in an isothermal batch reactor with catalyst decay... The reactant conversion after 1 day of operation is ______ (rounded off to 2 decimal places).
Consider the flowsheet for manufacturing C via A+B→C in an isothermal CSTR... optimum value of reactor volume V is ______ m3 (rounded off to the nearest integer).
Ratio of activation energy to universal gas constant is 1000 K. Temperature dependence follows collision theory. Ratio of rate constant at 600 K to 400 K is
RTD curve given for non-ideal reactor. First-order reaction with k=0.2 min−1, inlet concentration 2 mol L−1. Reactant concentration in exit stream is mol L−1.
CO undergoes molecular adsorption and H2 undergoes dissociative adsorption on catalyst sites. Ratio of catalyst sites occupied by CO to hydrogen atoms is
Gas-phase reaction A→B+C in PFR vs CSTR operating at different temperatures and feed conditions for 80\% conversion. Estimated activation energy is kJ mol−1.
