Nguyên tắc cơ bản của động học phản ứng khí-lỏng Các động lực học của các phản ứng không đồng nhất được quản lý bởi lý thuyết hấp thụ các khí trong chất lỏng đi kèm với các phản ứng hóa học. Các nguyên tắc cơ bản của những lý thuyết là cần thiết để hiểu được hiện tượng phát triển trong ozonation của các hợp chất trong nước. Các bước cần thiết để nghiên cứu động học chất lỏng phản ứng khí được mô tả dưới đây. Kể từ khi các phản ứng ôzôn có thể được coi là không. | 4 Fundamentals of Gas-Liquid Reaction Kinetics The kinetics of heterogeneous reactions is governed by absorption theories of gases in liquids accompanied by chemical reactions. The fundamentals of these theories are necessary to understand the phenomena developing during the ozonation of compounds in water. The necessary steps to study the kinetics of gas-liquid reactions are described below. Since ozone reactions can be considered irreversible isothermic and of second order1 for a general ozone-B reaction or pseudo first-order a case of ozone decomposition reaction the discussion that follows mainly refers to this type of gas-liquid reactions. Nonetheless some fundamental aspects on seriesparallel reactions are also given. Notice that ozonation of compounds in water yields a series of by-products that also react with ozone. Therefore the kinetics of seriesparallel gas-liquid reactions constitutes another part of this study. As a first step the physical absorption of a gas in a liquid is treated as commented below. PHYSICAL ABSORPTION In a gas-liquid reacting system diffusion convection and chemical reaction proceed simultaneously and the behavior of the system can be predicted with the use of models that simulate the situation for practical purposes. These models are based on those describing the gas physical absorption phenomena that is they are based on gas absorption theories. In a general case when gas and liquid phases are in contact the components of one phase can transfer to the other to reach the equilibrium. If it is assumed that one component A of a gas phase is transferred to the liquid phase the rate of mass transfer or absorption rate of A is as follows NA kG PAb - Pi kL C - CAb where SI units of NA are in molm-2s-1 kG and kL are the individual mass transfer coefficients for the gas and liquid phases respectively PAb and Pi the partial pressures of A in the bulk gas and at the interface respectively and CA and CAb are the concentrations of A .
