The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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,...
Alkylate is an ideal blending component for motor gasoline. The alkylation of isobutane with 2-butene to produce high-quality alkylate was catalyzed by several amide-AlCl3-based ionic liquid (IL) analogues with different structures and CuCl modification. The influences of the amide structure, amide/AlCl3 molar ratio, and CuCl modification on the catalytic performance were investigated in an autoclave...
In this study, FeCl3 was proven to be an efficient catalyst for glucan hydrolysis to produce levulinic acid (LA) with corn stalk as substrate. The use of a well evaluated and detailed model to study the kinetics, and the use of corn stalk instead of cellulose as raw material to produce LA, make our work original. Through the experiment, a maximum LA concentration of 16.14g/L was obtained under 180°C...
This paper aims to analyze the effects of mineralogy on petrophysical properties and evaluate the performance of eight permeability estimation models in tight oil sandstones. The results include mineralogy, pore size distribution, porosity, and permeability. The evaluated eight permeability models are Purcell, Winalnd, Swanson, Thomeer, Wells-Amaefule (W-A), Katz-Thompson (K-T), Pittman and Dastidar...
Shale matrix pore structure controls the gas storage mechanism and gas transport behaviors. We employed various techniques to characterize the complex pore structures of 12 shale samples collected from two marine shale formations in upper Yangtze area (UYA) in China. The characterization techniques include field emission scanning electron microscopy (FE-SEM), high-pressure mercury intrusion porosimetry...
Understanding methane sorption behavior in the gas-shale system is of great importance for evaluating reservoir production potential and reducing exploration risk. In this study, methane sorption capacities of total 12 organic-rich marine shale samples from the southwest of China were measured by volumetric method. The absolute sorption results were modeled using Langmuir, Brunauer–Emmett–Teller (BET),...
Gas diffusion in coal is controlled by nano-structure of the pores. The interconnectivity of pores not only determines the dynamics of gas transport in the coal matrix but also influences the mechanical strength. In this study, small angle neutron scattering (SANS) was employed to quantify pore accessibility for two coal samples, one of sub-bituminous rank and the other of anthracite rank. A theoretical...
It is difficult to selectively remove H2S and simultaneously avoid SO2 emission in biogas purification process with a low-cost and efficient method. In this study, an efficient hybrid adsorbent/photocatalytic composite (TiO2/zeolite) was synthesized for the H2S removal and SO2 capture by coating TiO2 on the surface of cheap natural zeolite with an ultrasonic-calcination way. The TiO2/zeolite showed...
Tight oil reservoirs typically show a wide pore size distribution with pore sizes ranging from several nanometers to several hundred microns, requiring a combination of several techniques to properly characterize the pore structures. In this paper, scanning electron microscopy, pressure-controlled porosimetry and rate-controlled porosimetry were applied to investigate the pore systems of a tight sandstone...
Comb-type poly(maleic alkylamide-co-α-octadecene) copolymers (MACs) with various ratios of polar carboxyl group/nonpolar octadecyl group were synthesized. Upon cooling, MACs change the size and shape of paraffin crystals, and reduce the pour point and yield stress of waxy oils, as observed by rheology, polarizing light microscopy, differential scanning calorimetry, and X-ray diffraction. They also...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.