Self-propagating exothermic reaction (SPER) of alternating metal nanolayers provides intense localised heat that allows bonding metals or alloys under ambient temperature. However, the formation bonds through rapid heating and cooling confined at interfaces is a non-equilibrium process, thermal effect on solidification manufacturing reliability yet to be understood. In this work, Cu/Sn-nanofoil...

Only one-step reaction has been identified for the addition mechanism of ethylene and butadiene based on first principles calculations. The reactant, product, transition state (TS) are determined by optimization calculation confirmed frequency analysis. intrinsic coordinate is also calculated to validate process. Result shows that whole an exothermic reaction. charge distribution used understan...

Abstract Methane pyrolysis in an externally heated tubular reactor inevitably ends with clogging of the reactor. Thin molten metal wall films protect walls from carbon depositions. A falling film and a rotating are investigated by CFD simulation. The results show considerable advantages compared to vertical An alternative route for production methane is implementation exothermic chlorination re...

We consider digital input-constrained adaptive output feedback control of a class of nonlinear systems which arise as models for controlled exothermic chemical reactors. Our objective is set-point control of the temperature of the reaction, with prespecified asymptotic tracking accuracy set by the designer. Our approach is based on λ–tracking controllers, but we introduce a piecewise constant s...

Thermochemical heat storage is an important solar-heat-storage technology with a high temperature and energy density, which has attracted increasing attention research in recent years. The mono-metallic redox pair Co3O4/CoO realizes exothermic process through reversible reaction. Its basic principle to store by absorption reduction reaction during high-irradiation hours (high temperature) then ...

The effect of adding both Al2O3 and ZrO2 to limestone (CaCO3) enhance the cyclic stability reaction kinetics endothermic CO2 desorption exothermic absorption is investigated. formation CaZrO3 Ca-Al-O compounds, e.g. CA5Al6O14, evident, which enables a substantial >80% capacity retention over 50 calcination/carbonation cycles. additives enable fast where an 80% energy storage reached within 20–3...

The global existence of entropy solutions is established for the compressible Euler equations for one-dimensional or plane-wave flow of an ideal gas, which undergoes a one-step exothermic chemical reaction under Arrhenius-type kinetics. We assume that the reaction rate is bounded away from zero and the total variation of the initial data is bounded by a parameter that grows arbitrarily large as...