Long time behavior Asymptotic limits 2 Asymptotics 2 Chemical reactions 2 Dimensionless parameters 2 Filter 2 Filters 2 Its efficiencies 2 Modeling 2 Modelling 2 Numerical models 2 Numerical solution 2 Numerical solutions 2 Optimal filtration 2 Sulfur dioxide 2 Toxic substances 2 Asymptotic stability 1 Bound states 1 Bound-states 1 Eigen-value 1 Eigenvalues and eigenfunctions 1 Evolution operator 1 Quantum theory 1 Quantum walk 1 Quantum walks 1 Scattering waves 1 Symptotic stability 1