Combustion reactions quench in small volumes due to fast heat escape via the volume boundary. Nevertheless, the reaction between hydrogen and oxygen was observed in nanoand micro-bubbles. The bubbles containing a mixture of gases were produced in microsystems using electrochemical decomposition of water with a fast switching of voltage polarity. In this paper, we review our experimental results...

A sub-millimeter scale catalytic combustor was fabricated. Platinum catalyst coated on a porous ceramics support was placed in the combustion chamber. The chamber, sized 10 10 1:5 mm was covered with a GaAs window which is transparent to infrared radiation. The conversion rate was measured using gas chromatography. The temperature distribution in the combustion chamber was measured with an infr...

Nowadays, the design and application of free-carbon emission renewable fuels in micropower generators seem to be interesting provide decentralized clean, affordable, resilient energy developing countries, thereby reaching 2050 net-zero carbon objectives. The operation micro-scale Closed Cycle Gas Turbine (CCGT) system with these such as biogas without negatively impacting combustion micro-turbi...

Nanomaterials with characteristic structural dimensions on the order of few nanometers (1–100 nm) attract wide attention owing to their unique properties. They found a variety of applications in different branches of science and industry including catalysis, micro and biotechnologies, energy storage and conversion devices, such as fuel cells. Different techniques have been developed for nanomat...

The expansion of the research on nanoscale particles demonstrates several advantages in terms stability and an increased surface area to volume ratio compared micron-sized particles. Based this, present work explores addition aluminum hydrotreated vegetable oil (HVO), alternative jet fuel. To evaluate influence particle sizes, nano micron (40 nm 5 ?m) a concentration 0.5 wt.% were stably suspen...

This paper presents a numerical and experimental study on the performance of a methanol steam reformer integrated with a hydrogen/air combustion reactor for hydrogen production. A CFD-based 3D model with mass and momentum transport and temperature characteristics is established. The simulation results show that better performance is achieved in the cross-U type reactor compared to either a tubu...

The framework of the heterogeneous multiscale methods (HMM) is briefly reviewed. Both the original HMM and the seamless HMM are discussed. Applications to interface capturing and flame front tracking are presented. 18.1 The Heterogeneous Multiscale Method The heterogeneous multiscale method (HMM) is a general framework for designing multiscale methods for a wide range of applications [8, 10]. H...

As a fundamental study relevant to micro-combustor application, the effects of mixture dilution on the lean extinction characteristics is studied for a stagnation-point flow system with a methane/air mixture over a platinum surface. For steady conditions, the level of flammability extension by surface reaction depends strongly on the mixture dilution, such that the benefit of catalyst-assisted ...

We present two simple alternative methods to form polymer-derived carbon nanodomains in a controlled fashion and at low cost, using custom-made chemical vapour deposition and selective laser ablation with a commercial CD-DVD platform. Both processes presented shiny and dark residual materials after the polymer combustion and according to micro-Raman spectroscopy of the domains, graphitic nanocr...