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The jet impinging flame is a typical flame-wall interaction configuration. This paper presented an experimental study of laboratory jet impinging ethylene diffusion flames with the special emphasis on characteristics of soot forming on the impinging plate. The soot distribution, nanostructure and reactivity which corresponded with different flame structures were investigated comparatively based on...
The gasification mechanism of char in the mixture of H2O, CO2, H2 and CO is controversial for a long time, and the reasons leading to different results of validation experiments of gasification mechanism are yet not clear. In this study, the specific surface area (SSA) and ash of char are assumed to be the possible reasons leading to the controversial results. The large-SSA char, the small-SSA char,...
This paper explored the effects of butanol isomers, n-butanol, iso-butanol, sec-butanol, and tert-butanol, as fuel-side additives on soot nanostructure and reactivity in ethylene inverse diffusion flames (IDF) and normal diffusion flames (NDF). The variations of structures and oxidation rates among the soot samples derived from ten different flames were studied and compared using high resolution transmission...
An innovative reference approach was developed to investigate the solvent effects on the liquefaction of sawdust by using tetralin as a chemical probe, and the corresponding solvent impact index was defined in this study. The influence of reaction conditions including reaction temperature and solvent types on solvent impact index were discussed. It was found that larger solvent impact index corresponds...
Numerical simulations of one-dimensional planar and spherical flame propagation of iso-octane/hydrogen/air mixtures at different equivalence ratios and hydrogen blending levels are conducted considering detailed chemistry. Our focus is on the effects of hydrogen addition on laminar flame propagation and ignition of iso-octane/air mixtures. Specifically, the laminar flame speed, Markstein length, and...
Slow pyrolysis of moso bamboo was performed using thermogravimetry–Fourier transform infrared analysis (TG–FTIR) and a laboratory-scale pyrolysis reactor. The effects of temperature on slow pyrolysis behavior, product properties, and carbon and energy yields at pyrolysis temperatures of 300–700°C were discussed. Typical compounds such as CO2, H2O, CH4, and CO were identified by their characteristic...
Two-dimensional (2-D) and three-dimensional (3-D) temperature distributions in laboratory-scale and large-scale pulverized-coal fired furnaces were reconstructed experimentally by means of CCD cameras through the inverse radiation analysis. The reconstruction technique was developed based on the backward Monte Carlo method. The reconstruction matrix equation was solved by the least square QR decomposition...
The hydrodesulfurization (HDS) of thiophene and its derivatives by Mo-based catalysts shows significant economic benefits in crude oil processing and refining. Several Mo-based catalysts have been successfully used for HDS reaction despite of unclear catalytic mechanism. Thereby we use in situ FT-IR technique to investigate the adsorption of thiophene on the surface of supported and dispersed sulfided...
This paper presented a model for simultaneously measuring the two-dimensional temperature and particle concentration distribution from the images of the flame. In order to determine the relationship between a point in the three-dimensional space and its image in the camera, the optical image-formation process was analyzed. The inverse problem of the radiation transfer in the participating medium was...
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