Batch reactor digital control

Batch Experimental Apparatus and Methods. The activity of the rhodium catalyst was tested in a 125 mL reactor with a pressure rating of 3000 psi at 350°C and a pressure relief valve that is rated for 1500-2200 psi. If the pressure valve releases, the gaseous contents of the autoclave are safely vented through a 1/4" stainless steel line and the liquid/vapor content in the autoclave is collected in a metal container and the vapor vented out through the hood. The reactor was heated in a silicone oil bath with a digitally controlled heat/stir plate. 

Since this is a batch system, it might be advisable to use direct digital control. Undoubtedly the throughput could be increased over that with the more traditional analog control system. However, the initial costs and maintenance expenses would also increase. To fully instrument the system would also greatly complicate the equipment required, especially for feeding the reactors (this is discussed later). An economic balance should be run to determine whether this is feasible. I feel it would not be warranted, and have chosen to instrument the plant in the traditional way. 

Cascade control, 395-402, 410, 445 Catalytic reactors auctioneering control, 405-7 fluid catalytic cracking, 75-76 regeneration of catalyst, 406 Centra] processing unit, 553-54 Characteristic equation, 285-87 of digital control loop, 623, 628 Characteristic polynomial, 145, 167, 321 of second-order system, 188 Chemical reactors batch (see Batch reactor) catalytic (see Catalytic reactor)... 

One irreversible chemical reaction occurs in a constant-volume batch reactor. The reaction is exothermic and a digital controller removes thermal energy at an appropriate rate to maintain constant temperature throughout the course of the reaction. Sketch the time dependence of the rate of thermal energy removal, d 2/t< f)removai vs. time, for isothermal operation when the rate law is described by ... 

Central Limit Theorem, 418 characteristic equation, 196,346 digital control, 329 characteristic polynomial, 93 characteristic roots, 493 chemic2il reactors ammonia synthesis, 276 batch, 438 catalytic, 298... 

---