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To investigate the methane adsorption capacity and the characteristics of gas shales under high pressures, we conducted total organic carbon (TOC), low-pressure nitrogen adsorption (LPNA), and high-pressure methane adsorption experiments (up to 30.0MPa) on eight Lower Silurian Longmaxi shale samples collected from northeastern Chongqing, China. The experimental results show that the excess adsorption...
A series of Mn/TiWOx catalysts were prepared and used in NH3-SCR reaction for NOx emission control. The experimental results showed that the SCR activities of Mn/TiWOx catalysts are higher than that of Mn/TiO2 catalyst. After that, several characterization techniques including XRD, H2-TPR, NH3-TPD, XPS were used to investigate the effect of TiWOx support on the SCR performance of Mn/TiWOx (1:1) catalyst...
The effect of HF treatment on the performance of ceria for selective catalytic reduction of NO with NH3 was investigated in this study. The experimental results showed that HF treatment could greatly enhance the SCR performance of ceria within the temperature range of 100–400°C. From the characterization results of Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), temperature programmed reduction...
Na has a serious deactivation effect on Mn/TiO2 catalyst for selective catalytic reduction of NO with NH3. In this study, it was found that Sb had a promotion effect on the Na resistance of MnOx/TiO2 catalyst. Then the promotion mechanism was investigated based on the characterization results of BET, XRD, H2-TPR, NH3-TPD, XPS and in situ DRIFT. The results of H2-TPR and NH3-TPD showed that the addition...
Oil shale pyrolysis is normally extremely complicated because many reactive processes simultaneously occur and different products are therefore continuously generated and serve as a new reactant, as a multi-stage processes with competing or parallel reactions. To probe deeply into the pyrolysis kinetics of Huadian oil shale, we have employed multi-stage parallel reaction model and bi-Gaussian distribution...
The permeability of methane hydrate reservoirs is a key parameter for estimating gas production performance and the flow behaviors of the gas and water during dissociation. In this study, pore network models are combined with X-ray computed tomography (CT) to investigate the index properties and percolation characteristics of hydrate-bearing porous media. Methane hydrate was formed with quartz sands...
In this study, the topochemical reaction strategy, utilizing Huadian oil shale to produce shale gas, liquid, and solid residues, has been demonstrated. Thermogravimetric analysis, Fourier transform-infrared spectroscopy, X-ray diffraction, gas chromatography–mass spectrometry, and scanning electron microscopy were performed to characterize the products obtained at different temperatures. Furthermore,...
Removal of NO was studied in a lab-scale bubbling reactor. Effects of operation parameters such as pH value, H 2 O 2 concentration, NO inlet concentration and reaction temperature on NO removal efficiency were investigated. The operation parameters included 250–1000ppm NO, 0.5–1.5mol/L H 2 O 2 , FeSO 4 0.05mol/L, 2–6 pH, 25–70°C. As can be seen from the experimental...
Dissolution rate of magnesium hydrate for wet flue gas desulfurization was measured by a pH-stat method. It was found that the dissolution rate of magnesium hydrate was controlled by mass transfer. As can be seen from the experimental results, the dissolution rate of magnesium hydrate increases with increasing reaction temperature and stirring speed. Lower pH value is favorable to the dissolution...
The absorption kinetics of NO into aqueous solutions of NaClO 3 /NaOH was investigated under different experimental conditions in a stirred tank reactor. It is proven that the absorption process is a fast pseudo-mth reaction. The reaction was found to be second-order with respect to NO and first-order with respect to NaClO 3 . The frequency factor and average activation energy of this...
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