Isothermal reactors molar flow rates

The reactions are elementary and take place in the gas phase. The reaction is to be carried out isothermally and as a first approximating pressure drop will be neglected. The feed consists of hydrogen gas, carbon monoxide, j carbon dioxide, and steam. The total molar flow rate is 300 mo /s. The entering pressure may be varied between 1 atm and 160 atm and the entering temperature between 300 K and 400 K. Tubular (PFR) reactor volumes between 0.1 m and 2 m are available for use. 

Ethylene and oxygen are fed in stoichiometric proportions to a packed-bed reactor operated isothermally at 260°C. Ethylene is fed at a rate of 0.30 lb mol/s at a pressure of 10 atm. It is proposed to use 10 banks of 11-in.-diameter schedule 40 tubes packed with catalyst with 100 tubes per bank. Consequently, the molar flow rate to each Qibe is to be 3 X lO " Ib inol/s. The properties of the reacting fluid are to be considered identical to those of air at this temperature and pressure. The density of the j -itL-catalyst particles is 120 Ib/ft and the bed void fraction is 0.45. The rate law is... 

Example 4-6 Calculating X in a Reactor with Pressure Drop Example 4 7 Gas-Phase Reaction in Microreactor—Molar Flow Rate Example 4-8 Membrane Reaeior Example CDR4.1 Spherical Reactor Example 4.3.1 Aerosol Reactor Example 4-9 Isothermal Semibatch Reactor Profe.ssional Reference Shelf R4.1. Spherical Packed-Bed Reactor. ... 

Isothermal Reactor Design Molar Flow Rates Chapter 6... 

Example 6-1 Gas-Phase Reaction in Microreactor—Molar Flow Rate Example 6-2 Membrane Reactor Example 6-3 Isothermal Semibatch Reactor Proressional Reference Shelf R6,1 UnsH udy CSTRs and Semihaich Reactors R6.1A Start-up of a CSTR... 

A feed enters a conversion reactor at 350°C, 30 atm, and a molar flow rate of 7600 kmol/h. The feed molar fractions are 0.098 CO, 0.307 HjO, 0.04 COj, 0.305 hydrogen, and 0.25 methane. The reactions take place in series. Assume 100% conversion of methane and CO, neglect pressure drop across the reactor. Calculate the molar flow rates of the product components. The reactions take place in an isothermal conversion reactor... 

Pure acetone reacts isothermally to form ketene and methane at 2 atm and 650°C. The percent conversion of acetone is 70%. Calculate the reactor exit molar flow rate of acetone, ketone, and methane. Calculate the heat added or removed from the reactor. As a basis assume 100 kmol/h of pure acetone. Note that 1 mol of acetone reacts to form 1 mol of ketene and 1 mole of methane. 

Find the reactor volume that achieves 94% conversion of ethanol, for the following liquid-phase reaction in an isothermal CSTR. The inlet molar flow rate is 50 kgmol/h ethanol, 50 kmol/h diethylamine, and 100 kgmol/h water. The reaction is in second order with respect to ethanol... 

Assume the reaction takes place in an isothermal PFR operating at con- stant pressure (1 atm) and constant temperature of 1100 K. The feed to the reactor consists of a mixture, of ethane and NO with a molar ratio of 95% ethane and 5% NO, The inlet, volumetric flow rate is 600 cm /s. Predict the reactor volume required for 98% of the ethane to react, and determine the activation energy for ketf-... 

Reactor and Reactor Conditions. A 5-litre glass reactor (15 cm diameter) fitted with four stainless steel baffles (10 cm x 1.5 cm) immersed in a thermostatted oil bath at 80 °C (reflux temperature of methyl acrylate) was used for polymerisation. Stirring was by means of a marine type impeller (6 cm diameter and pitch 45°). The overall reaction rate was sufficiently slow to ensure isothermal conditions. Additions of solutions of the more reactive monomer (styrene, of molar concentration 0.8) to the reactor were made using a computer controlled positive displacement pump (Precision Metering Ltd.) with four long-stroke pump heads, 90 out of phase to minimise pulsation of the flow. 

In a recently published reactor design textbook, a problem begins as follows The heterogeneous gas-phase catalytic chemical reaction, A - - B C, is carried out in an isothermal isobaric flow reactor. If Q represents the molar density of species i, then the volume-based kinetic rate expression for the reaction is... 

The effectiveness factor is required to estimate the average rate of consumption of reactants in the catalytic pores based on temperatnre and molar density at the external surface or in the adjacent bulk gas stream moving through the fixed-bed reactor. Hence, plng-flow design equations presented in Section 27-6 for packed catalytic tubular reactors must include the effectiveness factor in the rate law, even when isothermal operation is a reasonable assnmption. 

---