Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Using computational singular perturbation as a diagnostic tool in ODE and DAE systems: a case study in heterogeneous catalysis

Journal Article · · Combustion Theory and Modelling
 [1];  [2];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We have extended the computational singular perturbation (CSP) method to differential algebraic equation (DAE) systems and demonstrated its application in a heterogeneous-catalysis problem. The extended method obtains the CSP basis vectors for DAEs from a reduced Jacobian matrix that takes the algebraic constraints into account. Here we use a canonical problem in heterogeneous catalysis, the transient continuous stirred tank reactor (T-CSTR), for illustration. The T-CSTR problem is modelled fundamentally as an ordinary differential equation (ODE) system, but it can be transformed to a DAE system if one approximates typically fast surface processes using algebraic constraints for the surface species. We demonstrate the application of CSP analysis for both ODE and DAE constructions of a T-CSTR problem, illustrating the dynamical response of the system in each case. We also highlight the utility of the analysis in commenting on the quality of any particular DAE approximation built using the quasi-steady state approximation (QSSA), relative to the ODE reference case.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
NA0003525
OSTI ID:
1834151
Report Number(s):
SAND-2021-13870J; 701309
Journal Information:
Combustion Theory and Modelling, Vol. 26, Issue 2; ISSN 1364-7830
Publisher:
Taylor & FrancisCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Microkinetic Modeling: A Tool for Rational Catalyst Design journal November 2020
Large-Scale Transient Sensitivity Analysis of a Radiation-Damaged Bipolar Junction Transistor via Automatic Differentiation book January 2008
Methods of Model Reduction for Large-Scale Biological Systems: A Survey of Current Methods and Trends journal June 2017
Analysis of the Computational Singular Perturbation Reduction Method for Chemical Kinetics journal January 2004
Structure of n-heptane/air triple flames in partially-premixed mixing layers journal November 2011
A CSP and tabulation-based adaptive chemistry model journal February 2007
An automatic procedure for the simplification of chemical kinetic mechanisms based on CSP journal July 2006
Microkinetic Modeling and Reduced Rate Expressions of Ethylene Hydrogenation and Ethane Hydrogenolysis on Platinum journal January 2011
Understanding complex chemical kinetics with computational singular perturbation journal January 1989
Chemical model reduction under uncertainty journal May 2017
Analysis of n-heptane auto-ignition characteristics using computational singular perturbation journal January 2013
Higher order corrections in the approximation of low-dimensional manifolds and the construction of simplified problems with the CSP method journal November 2005
The G-Scheme: A framework for multi-scale adaptive model reduction journal July 2009
Analysis of methane–air edge flame structure journal July 2010
Skeletal mechanism generation with CSP and validation for premixed n-heptane flames journal January 2009
Explicit Time-Scale Splitting Algorithm for Stiff Problems: Auto-ignition of Gaseous Mixtures behind a Steady Shock journal May 2001
CHEMKIN-III: A FORTRAN chemical kinetics package for the analysis of gas-phase chemical and plasma kinetics report May 1996
The Computational Singular Perturbation/Perfectly Stirred Reactor Approach in Reduced Chemistry of Premixed Ethanol Combustion journal May 2017
Computer-Generated Kinetics for Coupled Heterogeneous/Homogeneous Systems: A Case Study in Catalytic Combustion of Methane on Platinum journal August 2019
Using CSP to Understand Complex Chemical Kinetics journal March 1993
Simplified CSP analysis of a stiff stochastic ODE system journal April 2012
The CSP method for simplifying kinetics journal April 1994
Modeling of the Interactions Between Catalytic Surfaces and Gas-Phase journal November 2014
Skeletal mechanism generation and analysis for n-heptane with CSP journal January 2007
Enhancements of the G-Scheme Framework journal June 2018
Kinetics of heterogeneous catalytic reactions: Analysis of reaction schemes book March 2001
Model Reduction and Physical Understanding of Slowly Oscillating Processes: The Circadian Cycle journal January 2006
Modeling the high-temperature catalytic partial oxidation of methane over platinum gauze: Detailed gas-phase and surface chemistries coupled with 3D flow field simulations journal April 2006
Computational Singular Perturbation Method and Tangential Stretching Rate Analysis of Large Scale Simulations of Reactive Flows: Feature Tracking, Time Scale Characterization, and Cause/Effect Identification. Part 1, Basic Concepts book January 2020
Quasi steady state and partial equilibrium approximations: their relation and their validity journal January 2012
Explicit time integration of the stiff chemical Langevin equations using computational singular perturbation journal May 2019
Computational singular perturbation analysis of brain lactate metabolism journal December 2019
Mechanism of Methanol Synthesis on Cu through CO 2 and CO Hydrogenation journal February 2011
Surface chemkin: A general formalism and software for analyzing heterogeneous chemical kinetics at a gas-surface interface journal December 1991
Singular Perturbation for Stiff Equations Using Numerical Methods book January 1985