填料塔气体吸收实验_实验报告_英文..docx

Division of EngineeringAssessed Report Department of Chemical EngineeringEH1SPF: Gas Absorption in a packed columnTo be completed by studentStudent NameStudent IDGroup numberDate of experimentDate submittedOffice use onlyGrade awardedPenaltyFinal gradeMarkers SignatureAbstractPacked tower is well known as one of the most wildly used method in absorption zone to separate different gas by liquid phase. In this experiment, the aim is to calculate the overall liquid transfer coefficient Kxa by the equation The value of Kxa in three groups are changeable and only two of which can work out Kxa value. The Kxa value of group 2 and group 3 is 0.014 and 0.012. In addition, both the Kxa value is below 1 so that log (Kxa) is always negative. Moreover, the G and HoL have a positive linear ratio.However, G and Kxa have a negative relationship, so does Kxa and HoL.These three diagrams illustrate that the gas flow rate has negative influence on the efficiency of gas absorption. And the height of a transfer unit also has an inverse ratio to the efficiency. ContentObjectivesThis experiment is designed for studyingthe theory of hydrodynamics and absorption processes in a packed tower. Improve the skill of solving open-ended question is also expected in this experiment.IntroductionAbsorption is a typical mass transfer process which is widely used in separation process.The removal of one or more selected components from a mixture of gases by absorption into a suitable liquid is the second major operation of chemical engineering. Packedtower is wildly used as one of the outstanding requirements to absorb with different phase solvent in both industry and laboratory. In this experiment, a mixture of CO2 and air is utilised in the packed tower, and CO2 is considered as the target gas which should be absorbed. Water is used as solvent liquid to solute CO2. By measuring the inlet and the outlet concentration, CO2 absorbed can be determined. Background theoryThe measure of the efficiency of t