Modeling and prediction of methanol air release from bleached chemi-thermo mechanical pulp board

Abstract

This paper reports on the modeling, prediction and evaluation approaches of methanol release from bleached chemi-thermo mechanical pulp (BCTMP) board during storage. A pseudo-first order desorption kinetics model of methanol release was established for describing the desorption behavior of methanol from BCTMP, i.e., C g;t ¼ C S;0 4 þ K ½1 À expðÀk des tÞ, in which the desorption constant (K) and rate constant (k des ) were well described by van't Hoff and Arrhenius equations. Based on the simulation experiments at various temperatures, the desorption activation energy of methanol and its adsorption enthalpy is calculated and is 53.7 and À86.2 kJ mol À1 K À1, respectively. With the developed model, the risk of methanol release for the storage of BCTMP board can be examined by either the time-dependent kinetics model or a two-step thermodynamic approach using the equilibrium concentration of methanol in indoor air. This paper provides a valuable tool to assess the risk of methanol release for the paper industry and related warehouse departments.

Photocatalytic Conversion of Organic Pollutants in Air: Quantum Yields Using a Silver/Nitrogen/TiO2 Mesoporous Semiconductor under Visible Light

“…It has been listed, since 1990, by the Environmental Protection Agency (EPA), as a hazardous air pollutant (HAPs) [1]. Methanol is primarily used as a chemical and solvent for industrial production, as well as an alternative fuel source for automobiles [2]. Methanol is mostly emitted from industrial solvent utilization facilities.…”