Numerical modelling of a microreactor for thermocatalytic decomposition of toxic compounds

Abstract

In this paper a three-dimensional model for determination of a microreactor's length is presented and discussed. The reaction of thermocatalytic decomposition has been implemented on the base of experimental data. Simplified Reynolds-Maxwell formula for the slip velocity boundary condition has been analysed and validated. The influence of the Knudsen diffusion on the microreactor's performance has also been verified. It was revealed that with a given operating conditions and a given geometry of the microreactor, there is no need for application of slip boundary conditions and the Knudsen diffusion in further analysis. It has also been shown that the microreactor's length could be practically estimated using standard models.

Applications of Ni3Al Based Intermetallic Alloys—Current Stage and Potential Perceptivities

“…Additionally, their catalytic properties may find an application in air purification systems from chemical and biological toxic agents or in a decomposition of hydrocarbons for hydrogen production [ 23 , 24 , 25 , 26 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 131 ].…”

“…Applications of Ni 3 Al foils and tapes for structural (load-bearing structure, plating), functional and multifunctional components are worked out. Beside of studies on fabrication and processing of the foils, a research is also carried out on joining technologies [ 131 , 132 , 133 , 134 , 135 , 136 ] and methods of a forming them into a “honeycomb” structures [ 32 , 111 , 134 , 135 ]. Mentioned properties of Ni 3 Al thin foils predispose them to applications in:…”

“…In contrast to conventional filtering devices (where after the hazardous substances are retained in the filters causing the need for their frequent replacement) designed device using thermocatalytic processes, remove them completely. Therefore, the “hot filter” works more efficiently and much faster as compared to conventional filtration systems [ 32 , 131 ].…”

Thermal and catalytic methods used for destruction of chemical warfare agents

“…In many works (Jóźwik et al 2011(Jóźwik et al , 2014Jang et al 2011;Hirano et al 2011;Chun et al 2006;Arkatova 2010;Zuo et al 2007), catalytic activity of bands made of this material in the decomposition reaction has been demonstrated for methanol, hexane, sarin, sulfur mustard and their simulant. The tests presented lately (Jóźwik et al 2011) were performed in a standard flow system with a fixed catalyst bed. Ni 3 Al band cut into square flakes with a side of 1 mm was placed in the reactor and filled with a quartz pestle with a grain size of 0.5-1 mm.…”

“…DMMP conversion efficiency on the surface of thin strips of Ni 3 Al as a function of the temperature(Jóźwik et al 2011) …”