Appendix - chemical engineering laboratory
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Appendix A – Uncertainty Analysis Measurement Uncertainties: The uncertainties associated with various measurements are found in Table A.1: Variable Uncertainty Source Reactor Flow Rate 3 mL/min Manufacturer Reactor Temperature 1 ⁰C Manufacturer Room Pressure .3 inHg Difference in Pressure Transistors Reactor Pressure .02 psig Calibration GC Area .2 Standard Deviation of Data Table A.1: Measurement Uncertainties Calibration Uncertainties: No calibration was required for this experiment. Analysis of Data: The uncertainty in rate constant value, k, is found using the propagation of error as in equation A.1. Measured uncertainties for reactor flow rate, reactor temperature, room pressure, reactor pressure and gas chromatography can be found in Table A.1. U k = √ ( dk dT rxn ∗U T rxn ) 2 +( dk dP rxn ∗U P rxn ) 2 +( dk dP amb ∗U P amb ) 2 +( dk dv ∗U v ) 2 +( dk dA ace ∗U A ace ) 2 +( dk dA IPA ∗U A IPA ) 2 Data was analyzed using the slope of inlet IPA mole fraction vs corresponding rate constant values. The uncertainty in this slope was found using a 95% confidence interval. Sample calculations can be found in Appendix D. Uncertainties in rate constant values can be found in Tables C.9, C.11, C.13 and C.15 of Appendix C.
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Chemical Engineering laboratory appendix A for uncertainty analysis calculation
Transcript of Appendix - chemical engineering laboratory
Appendix A Uncertainty AnalysisMeasurement Uncertainties:The uncertainties associated with various measurements are found in Table A.1:VariableUncertaintySource
Reactor Flow Rate3 mL/minManufacturer
Reactor Temperature1 CManufacturer
Room Pressure.3 inHgDifference in Pressure Transistors
Reactor Pressure.02 psigCalibration
GC Area.2Standard Deviation of Data
Table A.1: Measurement Uncertainties
Calibration Uncertainties:No calibration was required for this experiment.Analysis of Data:The uncertainty in rate constant value, k, is found using the propagation of error as in equation A.1. Measured uncertainties for reactor flow rate, reactor temperature, room pressure, reactor pressure and gas chromatography can be found in Table A.1.
Data was analyzed using the slope of inlet IPA mole fraction vs corresponding rate constant values. The uncertainty in this slope was found using a 95% confidence interval. Sample calculations can be found in Appendix D. Uncertainties in rate constant values can be found in Tables C.9, C.11, C.13 and C.15 of Appendix C.
