The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A sampling system to collect exhaust emissions of a methanol engine by means of a sampling bag and an absorber was designed to absorb formaldehyde and unburned methanol emissions with deionized pure water. Three novel measurement methods that combine gas chromatography and liquid chromatography (GCLC), gas chromatography and the light spectrum (GCLS), and liquid chromatography and light spectrum (LCLS)...
This study examined the feasibility of catalytic depolymerization of coal char obtained from the pyrolysis of low-rank coal at low temperature over iron-based catalyst to produce valuable chemicals. The depolymerization with or without the addition of ferric nitrate in a Gray-King assay reactor from 150 to 600°C was performed. Compared with 0.2% of organic liquid products generated from the depolymerization...
A series of P-promoted non-noble metal Cu-based catalysts without alkalis and Fischer-Tropsch elements were prepared by a complete liquid-phase method and tested for the synthesis of higher alcohols (C2+OH) from syngas in slurry bed reactor. The catalysts were characterized by XRD, 27Al-MAS-NMR, N2 adsorption, XPS, H2-TPR and NH3-TPD techniques. Results showed that the incorporation of an appropriate...
A comprehensive and systematic study on the fundamental pyrolysis behaviors of a single coal particle was performed in this study. The pyrolysis characteristics of coal was investigated by non-isothermal thermo gravimetric analysis whereas the reaction kinetic parameters were obtained by using the distribute activation energy model (DAEM). As three heating rate profiles were applied (10, 20 and 30°C/min)...
The rapid fuel–air mixing enhancement is one of the important issues for the efficient operation of scramjet engines, and it attracts an increasing attention all over the world. The influence of jet-to-crossflow pressure ratio arrangement on the turbulent mixing in the staged transverse injection flow field has been investigated numerically, and the multiport injection system with four square-shaped...
Cogasification of low rank coal with three kinds of biomass, i.e., Japanese cedar, rice straw, and seaweed, at relatively low temperatures were performed in a fixed bed downdraft reactor. The effect of different biomass addition on the coal gasification performance was investigated by comparing the experimental char and gas yields with the calculated prediction data. Effect of the blending ratio was...
The three-dimensional (3D) dynamics of a propane diffusion flame was investigated using high speed stereo imaging and a newly developed stereoscopic schlieren techniques. The laminar flame is kept at a flow rate of 0.3slpm, which corresponds to a mean exit flow velocity of 0.30m/s and a low Reynolds number at 300. The flame shows a typical flickering phenomenon at 11Hz. The 3D dynamics of the visible...
An innovative 3D flame visualisation and digital reconstruction technique was developed on the basis of digital flame colour enhancement and conventional stereo reconstruction methods. This combined methodology, together with Schlieren visualisation technique, was utilized to investigate the ignition process of propane impinging diffusion flame. Through the application of flame colour analysis, it...
Using nonlinear theory as guidance, the expected (both reported and unreported) nonlinear response modes of a laminar diffusion flame to external acoustic excitation are investigated at different frequencies (6–100Hz). The flame oscillating frequency is analyzed using digital signal and image processing techniques, while the hot gas dynamics are visualized by a high speed schlieren imaging system...
The experimental investigation of impinging diffusion methane (CH 4 ) and propane (C 3 H 8 ) ignition-to-combustion process under varying fuel flow rates and ignition positions have been characterised through multi-dimensional Digital Flame Colour Discrimination (DFCD) incorporated image processing methods. The DFCD post-processed digital flame images revealed that a 2D bluish-green...
The optimal conditions for the maximum production of ethanol from cellulosic hydrolysate in batch and fed-batch cultures were investigated and compared. The pretreated corncob could be converted into reducing sugar with maximal yields after the enzyme mixtures were fed. After 48h of hydrolytic reaction, overall reducing sugar and glucose concentrations reached 0.61 and 0.36g/g dried substrate, respectively...
The experimental investigation of the dynamic flame flickering properties of acoustically excited combustion process has been conducted. In particular, the variations of flame oscillation frequency response in diffusion-like sooty and premixed-like chemiluminescence flame colour entities under external acoustic perturbation were extracted, analysed, and compared using digital colour image processing...
The experimental investigation of flame properties based on digital colour analysis has been conducted. In particular, the practicality of obtaining physical flame chemiluminescence characteristics through the inherent colour-filtering architecture employed in the digitisation of flame images was demonstrated. This is important as radical emission signals is an effective non-intrusive tool for deriving...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.