Chemical Engineering :: Chemical Reaction Engineering
- A catalyst loses its activity due to
- Which of the following resistances is not involved in a gas phase catalytic (gas- solid) reaction?
- __________ resistance is not involved in the combustion of a carbon particle.
- Pick out the wrong statement.
- The excess energy of reactants in a chemical reaction required to dissociate into products is termed as the __________ energy.
- Which of the following is used for calcination of limestone and dolomite in industrial practice?
- The reactions of high molecularity are rare, because
- Molecularity of a reaction
- A CSTR is to be designed in which an exothermic liquid phase first order reaction of the type, A → R, is taking place. The reactor is to be provided with a jacket in which coolant is flowing. Following data is given: CA0= 5 kmole/m³ ; XA = 0.5; Feed temperature = reactor temperature = 40°C. Rate constant at 40°C = 1 min⁻¹ ; (ΔH) = - 40kJ/mole; ρ = 1000kg/m³ CP = 4 J/gm.°C ; q = 10⁻³ m³/min (ρ and CP are same for the reactant and product streams). The amount of heat to be removed is
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A.
The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively |
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B.
Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant |
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C.
Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty |
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D.
N an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in logitudinal direction |