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Partial oxidation presents a novel method to produce liquid fuels, such as gasoline, diesel and vacuum gas oil, from vacuum residue (VR). Al and Zr-doped α-Fe2O3 catalysts were prepared for partial oxidation of VR. The catalysts were characterized by N2 adsorption/desorption, X-ray diffraction, H2 temperature programmed reduction, Raman, and X-ray photoelectron spectroscopy. The results showed that...
The catalytic effect of calcium on the steam gasification of Shengli chars was studied in this work. The calcium-added chars were prepared by pyrolysis under argon atmosphere from calcium oxide added demineralized Shengli lignite. The chars were characterized in detail by SEM-EDX, XRD, Raman, FTIR and XPS and were tested on a fixed-bed reactor to evaluate its performances steam gasification. Calcium...
High temperature coal gas desulfurization is an efficient and environmental-friendly process for clean coal technologies such as the integrated coal gasification combined cycle. This study adopted microwaves as the energy source to prepare iron oxide desulfurization sorbents and investigated the effect of microwave heating on the properties of the sorbents. The desulfurization kinetics of H2S removal...
Direct coal liquefaction (DCL) was investigated using a deuterium tracer method which makes it possible to determine which structural positions in the coal react with H2 or hydrogen-donor solvents, i.e. hydrogen-transfer mechanism. D2 and/or 1,2,3,4-d4-tetralin (tetralin-d4) were used in DCL of Bulianta coal at 7.0MPa (initial charge pressure) and 445°C for 0 or 60min in a tubing-bomb microreactor...
Investigation of the effects of demineralization of inherent minerals in Shengli lignite (SL) on its structure and combustion property in the field of coal conversion is an extremely important and interesting topic. In this study, inherent minerals in SL were demineralized by hydrochloric acid (HCl) treatment. Further, the metals cations Na+, Al3+, K+, Ca2+, Mn2+ and Fe3+, corresponding to the inherent...
Accurate models of gas transport in shale gas reservoirs must consider complex gas transport mechanisms and phase behavior in nanopores, as well as different pore types. The gas transport mechanisms in shale gas reservoirs include viscous flow, Knudsen diffusion, surface diffusion, adsorption and desorption. In this study, a unified model of nanopore gas transport in shale gas reservoirs is presented...
The combustion behavior of sewage sludge under oxy-fuel condition was evaluated based on a thermal analysis technique. At heating rates of 20–80Kmin−1, the ignition temperatures of the sewage sludge were between 250 and 300°C under air and three O2/CO2 atmospheres (oxygen contents of 21%, 30% and 40%). The burning process of the sewage sludge in air was very similar to 30%O2/70%CO2 atmosphere. The...
Lignite drying in methane atmosphere is a potential approach to utilize moisture in lignite as a feedstock for H 2 production via steam reforming of methane. In this paper, experiments on drying and moisture re-adsorption properties of Huolinhe lignite in nitrogen and methane were carried out in a fixed-bed apparatus and thermogravimetric analyzer to investigate the effect of drying temperature,...
Petroleum coke was gasified using non-isothermal thermogravimetric analysis (TGA). The catalytic effects of FeCl 3 , CaCl 2 , KCl, K 2 CO 3 , K 2 SO 4 , KAC and KNO 3 were studied. It was found that the gasification of petroleum coke was inefficient at temperature <1000°C. However, with the addition of catalysts, the efficiency greatly improved...
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