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.
In this work, a CO2 sorbent was prepared by immobilizing tetraethylenepentamine (TEPA) onto modified carbon nanotubes. Modification of carbon nanotubes (CNTs) using a KOH reagent was done to increase the surface area and pore volume of the CNTs. The prepared sorbents were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM),...
In this work, an inorganic-organic CO2 sorbent was prepared by immobilizing tetraethylenepentamine (TEPA) onto nanoporous titanium oxyhydrate (TiO(OH)2). The prepared sorbents were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and Brunauer-Emmett-Teller (BET) analyses. At the optimal...
With the timelines for implementation of the U.S. Environmental Protection Agency’s mercury emission control rules approaching soon, finding an innovative and cost-effective mercury removal technology has become increasingly important. The most challenging species in all the mercury forms is gaseous elemental mercury (Hg0). The objective of this work is to inspect the absorption behavior and removal...
Many sorbents have been studied for their CO 2 sorption capacities with CO 2 and N 2 mixture. In reality, flue gases contain SO 2 . This research was designed to develop and evaluates an inexpensive and robust CO 2 sorbent for actual flue gas. Ca(OH) 2 , CaO and CaCO 3 were explored to serve as additives of K 2 CO 3 /γ-Al ...
The objective of this research is to develop amine-grafted mesocellular silica foams (MCFs) based CO 2 sorbents. The template of the as-synthesized MCFs was removed by calcination or ethanol extraction method. The obtained template-free MCFs were grafted with 3-aminopropyltriethoxysilane (APS) or 3-(2-aminoethylamino)-propyl-dimethoxymethylsilane (APMS). These new composite sorbents were characterized...
A theoretical understanding of CH 4 dissociation on Ni-based catalysts is of great importance for the development of CH 4 reforming catalysts with high activity and carbon-deposition resistance. Based on comparisons of CH 4 dissociation on perfect and defective MgO supported Ni 4 , as well as Ni(111), the effects of the strong interactions between Ni 4 and MgO...
The objective of this research is to study the effect of the composite catalyst, FeCO 3 –Na 2 CO 3 , on gasification of a low-sulfur sub-bituminous Wyodak coal from the Powder River Basin (PRB) of Wyoming. The catalytic effects of the composite catalysts were evaluated by comparing their effluent gas compositions and carbon conversion kinetics to those achieved in the presence...
Density functional theory (DFT) has been applied to investigate the adsorptions of CH 4 , CH 3 , CH 2 , CH, C, H and dissociations CH 4 , CH 3 , CH 2 , CH on the (111) catalyst surfaces of elementary metals Co bimetals NiFe. More important, the adsorptions and dissociations of those adspecies on elementary metals (Fe, Co, Ni and Cu) and bimetals (NiFe,...
The catalytic activity of Lewis acidic metal chlorides were screened for the production of biofuel precursor platform chemical, 5-hydroxymethylfurfural (HMF), from carbohydrates and biopolymers in aqueous and biphasic solvents under microwave and conventional heating methods. The screening of metal chloride catalysts for dehydration of several carbohydrate substrates revealed that Zr(O)Cl 2 ...
Catalytic gasification of a Wyodak low-sulfur sub-bituminous coal from the Powder River Basin of Wyoming was investigated using an inexpensive catalyst, Na 2 CO 3 , widely available in Wyoming. Experiments were performed in an atmospheric pressure fixed-bed laboratory gasifier. The effects of different factors including feed gas composition, catalyst loading and reaction temperature...
This research investigates factors influencing precision and accuracy of photoacoustic measurements of unburned carbon in fly ash. This information is useful for the development of instruments to monitor the performance of coal-fired boilers. Important factors identified by this research include the protocols for sampling and preparing fly ash for measurements, the ambient conditions at which photoacoustic...
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.