在aspen中怎么选用反应器？ model purpose rstoic conversion reactor with known stoichiometry ryield yield reactor with known product yields requil two-phase chemical equilibrium reactor (stoichiometric) rgibbs multiphase chemical equilibrium reactor (non-stoichiometric) rcstr continuous stirred tank reactor with known kinetics rplug plug flow reactor with known kinetics rbatch batch or semi-batch reactor with known kinetics rstoic, ryield, rgibbs, and rcstr can have any number of material feed streams, which are mixed internally. heats of reaction are not required for any reactor model. aspen plus calculates heats of reaction using heats of formation. for rcstr, rplug, and rbatch, you must provide reaction kinetics information using: • the built-in power law model • the built-in generalized langmuir-hinschelwood-hougen-watson (lhhw) model • a user-written fortran subroutine (for more information, see aspen plus user models) rstoic models a reactor when: • reaction kinetics are unknown or unimportant. • stoichiometry is known. • you can specify the extent of reaction or conversion. rstoic can handle reactions that occur independently in a series of reactors. it can also perform product selectivity and heat of reaction calculations. ryield models a reactor by specifying reaction yields of each component. this model is useful when: • reaction stoichiometry and kinetics are unknown. • yield distribution data or correlations are available. requil models reactors when some or all reactions reach equilibrium. requil can calculate single-phase chemical equilibrium, or simultaneous phase and chemical equilibria. requil calculates equilibrium by solving stoichiometric chemical and phase equilibrium equations. rgibbs models single-phase chemical equilibrium, or simultaneous phase and chemical equilibria. you must specify the reactor temperature and pressure, or pressure and enthalpy. rgibbs minimizes gibbs free energy, subject to atom balance constraints. this model does not require reaction stoichiometry. rgibbs can determine phase equilibrium without chemical reaction, particularly for multiple liquid phases. any number of liquid phases are allowed. you can model solids in rgibbs either as single condensed species and/or as solid solution phases. you can also assign components to be in particular phases in equilibrium. you can use different property models for each liquid or solid solution phase. this capability makes rgibbs particularly useful for: • pyrometallurgical applications • modeling ceramics and alloys rgibbs accepts restricted equilibria specifications. you can restrict equilibrium by specifying: • fixed moles of any product • percentage of a feed component that does not react • temperature approach to equilibrium for the entire system • temperature approaches for individual reactions • fixed extents of reaction rcstr rigorously models a continuous-stirred tank reactor. you can use this model when: • reaction kinetics are known. • the contents of the reactor have the same properties as the outlet stream. rcstr can model equilibrium reactions simultaneously with rate-based reactions. rcstr computes one of the following for the reactor: • heat duty given the temperature • temperature given the heat duty rplug rigorously models plug flow reactors. a cooling stream around the reactor is optional. you can also use rplug to model reactors with cocurrent and countercurrent coolant streams. rplug handles rate-based kinetic reactions only. rbatch rigorously models batch or semi-batch reactors. holding tanks are used to interface the batch reactor with the steady-state streams of an aspen plus simulation. for semi-batch reactors, you can specify a continuous vent and any number of continuous or delayed feeds. rbatch handles rate-based kinetic reactions only. 根据已知数据自己选查看更多
关于制备格氏试剂中碘引发的机理是什么? 一般来说,制备格式试极在于引发, 去掉mgo. iodine will react with mg to form mgi2, which will expose the fresh mg area to the halide and therefore reaction will go smoothly. 查看更多
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