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Coal structure determines the porosity and permeability in coal reservoirs to a great extent, which not only influences the evaluation of coalbed methane (CBM) reservoirs, but is also closely related to their production efficiency. The traditional methods for identifying coal structure mainly depend on coals in boreholes or underground roadway sections. However, as these methods are expensive and...
The performance of catalyst-combining silver (Ag) and molybdenum (Mo) for elemental mercury (Hg0) oxidation was clearly improved, and the experimental results demonstrated the synergy between Ag and Mo. The physical and chemical characterizations indicated that Ag0 and Ag2MoO4 nanoparticles existed on the surface of TiO2 for Ag(2%)–Mo–Ti. Furthermore, the oxidation ability of Mo–Ti was enhanced, and...
To study the influence of sidewall effect on flame characteristics and burning rate, a series of experiments with heptane pools was conducted. The results showed that as the fires were placed close to the sidewall, the flames inclined to the sidewall due to the restriction on air entrainment, and the burning rate increased on the whole, which could be mainly due to the enhanced radiation from the...
Selective separation of nitrogen (N 2 ) from methane (CH 4 ) is highly significant in natural gas purification, and it is very challenging to achieve this because of their nearly identical size (the molecular diameters of N 2 and CH 4 are 3.64Å and 3.80Å, respectively). Here we theoretically study the adsorption of N 2 and CH 4 on B 12 cluster...
Density functional theory (DFT) calculations have been carried out to explore the catalytic activation of C–H bonds in methane by the iron atom, Fe, and the iron dimer, Fe 2 . For methane activation on an Fe atom, the calculations suggest that the activation of the first C–H bond is mediated via the triplet excited-state potential energy surface (PES), with initial excitation of Fe to the...
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...
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