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1. Write down in dimensionless form the material balance equation for a laminar flow tubular reactor accomplishing a first-order reaction and having both axial and radial diffusion. State the necessary conditions for solution.
2. Falch and Gaden studied the flow characteristics of a continuous, multistage fermentor by injecting an impulse of dye to the reactor [E. A. Falch and E. L. Gaden, Jr., Biotech. Bioengr., 12 (1970) 465]. Given the following RTD data from the four-stage fermentor, calculate the Pea that best describes the data.
Figure shows an x-ray diffraction pattern for a-iron taken using a diffract meter and monochromatic x-radiation having a wavelength of 0.1542 nm; each diffraction peak on the pattern has been indexed.
Describe the principles of a vapour adsorption refrigeration system, and compare this to a vapour recompression system. Which of the two systems is more suitable for refrigeration processes in a brewery or distillery and why?
The uniform air gap is of length 1 mm, while the armature diameter is 0.5 m, and the axial length of the machine is 1.5 m. The field winding carries a current of 1 A (dc) and the rotor is driven at 3600 r/min.
Design Options for Recovery of Acetic Acid from Aqueous Solution. The project involves the comparison of two methods for recovery of acetic acid from an aqueous solution. Your client is planning to add additional acetic acid production capacity of..
Show that the absence of weak reversibility from the assumptions of the last on (4.15) and (4.16) might preclude both the existence and uniqueness of positive equilibrium points.
When the valve is quarter open, what fraction of the pump work is lost across the valve?
At one time, biologists thought that fungi were merely forms of plants that had lost their chlorophyll and had returned to saprotrophy to gain food. Why is this no longer considered a solid theory?
During the research that led to production of the two atomic bombs used against Japan in World War II, different mechanisms for obtaining a supercritical mass of fissionable material were investigated.
A 2300-V, three-phase, wye-connected, round rotor synchronous motor has a synchronous reactance of 3 Ω per phase and an armature resistance of 0.25 Ω per phase. The motor operates on load with a power angle of -15°, and the excitation is adjusted ..
A handbook lists the 60-Hz resistance at 50°C of a 900-kcmil aluminum conductor as 0.1185 Ω/mile. If four such conductors are used in parallel to form a line, determine the 60-Hz resistance of this line in Ω/km per phase at 50°C.
Calculate the stoichiometric reactant ratio (mol H2 react/mol C2H2 react) and the yield ratio (k mol C2H6 formed/k mol H2 react).
A flat slab of Douglas fir wood 50.8 mm thick containing 30 wt% moisture is being dried from both sides (neglecting edges and ends). The equilibrium moisture content at the surface of the wood due to the drying air blown over it is held at 5 wt% mois..
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