The conversion proceeds through a complicated mechanism that involves a CC coupling reaction and hydrodeoxygenation.
The residence time distribution (RTD) of solids is essential for the design of CFB reactors where conversion proceeds with time.
Hence, if we achieve conditions under which OLR and grain size have no influences on the sulphur conversion, we may assert that reactions of sulphur conversion proceed in the kinetic area.
By applying this technique, it was found that most of the reaction (CO and H2 conversion) proceeds in the first 20 mm of the bed depending on the experimental conditions.
They suggested that this conversion proceeds with an analogous mechanism to the one encountered in the hydrolysis of β-ketosilanes following treatment with water [ 37].
Moreover, our data show that MPTP conversion proceeds more than 10 times faster in the presence of biological oxidation enhancers, such as melanin, oxidized dopamine, or ferrous iron.
Representative H NMR spectra for the conversion of a fresh sample of 1 a in [D3]acetonitrile, deliberately left exposed to incident daylight over ten days, are presented in Figure 4. Examination of these spectra indicate that the samples undergo clean conversion of 1 a into a new complex 3 a and that this conversion proceeds via an intermediate species 2 a (Scheme 3).
In this model, cyclo-DOPA is formed from L-DOPA through an oxidation reaction that also has been attributed to tyrosinase activity [ 5, 6, 13] The conversion proceeds via an unstable dopaquinone intermediate, which spontaneously cyclizes to form cyclo-DOPA. Betacyanins are generally O-glycosylated (at the C-5 or C-6) and frequently subsequently acylated.
While describing conversions occurred with the coal organic matter (COM), we assumed that conversions proceed in three directions, i.e. thermal destruction (decomposition tar is formed); gasification with the formation of combustible gases (hydrogen, hydrocarbons, CO); burning (CO2 is obtained).
While describing conversions which occurred with the coal organic matter (COM), we assumed that conversions proceed in three directions, i.e. thermal destruction (decomposition tar is formed); gasification with the formation of combustible gases (hydrogen, hydrocarbons, CO); burning (CO2 is obtained).
