TY - CHAP
T1 - Determining the Design Parameters of Reactive Distillation Processes by a Quick Mapping Method
AU - Muthia, Rahma
AU - Jobson, Megan
AU - Kiss, Anton A.
N1 - Funding Information:
RM gratefully acknowledges full fund support from LPDP (Indonesia Endowment Fund for Education). AAK is thankful for the Royal Society Wolfson Research Merit Award.
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/1
Y1 - 2020/1
N2 - The application of reactive distillation in the chemical process industry promises significant benefits, such as boosting energy efficiency and reducing the overall cost. However, assessing and designing a reactive distillation process is still challenging as these tasks usually demand time-consuming procedures. To overcome this problem, the present work proposes a quick approach to determine the design parameters for a kinetically-controlled reactive distillation process according to the ratio between the Damköhler (Da) number and the chemical equilibrium constant (Keq) – thus relating reaction kinetics and chemical equilibrium. This study employs a mapping method featuring an applicability graph that conveniently plots the reflux ratio vs. the number of theoretical stages and extends it to account for kinetically-controlled reactions. The method is demonstrated using the map for a generic quaternary reaction system, described as A + B ⇌ C + D, considering constant relative volatilities (αAB = 2 and αCD = 6) and various reaction equilibrium constants (Keq = 0.01, 0.1, 1). For validation purposes, the applicability of reactive distillation is examined in two case studies -hydrolysis of methyl lactate and synthesis of methyl acetate. Modelling of both the generic and real systems suggests that, with a ratio Da/Keq of 5 or more, the generic map can provide initial values for the design parameters of a reactive distillation column. Ultimately, the insights gained save time in effectively assessing the feasibility of reactive distillation at the conceptual design stage.
AB - The application of reactive distillation in the chemical process industry promises significant benefits, such as boosting energy efficiency and reducing the overall cost. However, assessing and designing a reactive distillation process is still challenging as these tasks usually demand time-consuming procedures. To overcome this problem, the present work proposes a quick approach to determine the design parameters for a kinetically-controlled reactive distillation process according to the ratio between the Damköhler (Da) number and the chemical equilibrium constant (Keq) – thus relating reaction kinetics and chemical equilibrium. This study employs a mapping method featuring an applicability graph that conveniently plots the reflux ratio vs. the number of theoretical stages and extends it to account for kinetically-controlled reactions. The method is demonstrated using the map for a generic quaternary reaction system, described as A + B ⇌ C + D, considering constant relative volatilities (αAB = 2 and αCD = 6) and various reaction equilibrium constants (Keq = 0.01, 0.1, 1). For validation purposes, the applicability of reactive distillation is examined in two case studies -hydrolysis of methyl lactate and synthesis of methyl acetate. Modelling of both the generic and real systems suggests that, with a ratio Da/Keq of 5 or more, the generic map can provide initial values for the design parameters of a reactive distillation column. Ultimately, the insights gained save time in effectively assessing the feasibility of reactive distillation at the conceptual design stage.
KW - conceptual process design
KW - Damköhler number
KW - equilibrium constant
KW - mapping method
KW - reactive distillation
UR - http://www.scopus.com/inward/record.url?scp=85092754967&partnerID=8YFLogxK
U2 - 10.1016/B978-0-12-823377-1.50145-2
DO - 10.1016/B978-0-12-823377-1.50145-2
M3 - Chapter
AN - SCOPUS:85092754967
T3 - Computer Aided Chemical Engineering
SP - 865
EP - 870
BT - Computer Aided Chemical Engineering
PB - Elsevier B.V.
ER -