Demirel
Belma Demirel, Buffalo, NY US
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20120153639 | METHOD FOR PROVIDING AUXILIARY POWER TO AN ELECTRIC POWER PLANT USING FISCHER-TROPSCH TECHNOLOGY - A method for meeting both base-load and peak-load demand in a power production facility. By integrating a Fischer-Tropsch (FT) hydrocarbon production facility with an electrical power generating facility, peak-load power demand can be met by reducing the temperature of the FT reactor thereby increasing the quantity of tail gases and using FT tail gases to fuel a gas turbine generator set. The method enables rapid power response and allows the synthesis gas generating units and the FT units to operate with constant flow rates. | 06-21-2012 |
20130217569 | STABLE SLURRY BED FISCHER-TROPSCH CATALYST WITH HIGH SURFACE AREA AND ACTIVITY - A method of forming a Fischer-Tropsch catalyst by providing at least one metal nitrate solution, combining each of the at least one metal nitrate solutions with a precipitating agent whereby at least one catalyst precipitate is formed, and incorporating a strong base during precipitation, subsequent precipitation, or both during and subsequent precipitation. Catalysts produced via the disclosed method are also provided. | 08-22-2013 |
20130296448 | PROTECTED FISCHER-TROPSCH CATALYST AND METHOD OF PROVIDING SAME TO A FISCHER-TROPSCH PROCESS - A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor. | 11-07-2013 |
Belma Demirel, Clarendon Hills, IL US
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20140274666 | SLURRY BED FISCHER-TROPSCH CATALYSTS WITH SILICA/ALUMINA STRUCTURAL PROMOTERS - A structurally promoted, precipitated, Fischer-Tropsch catalyst that exhibits an RCAI-10 of 0-2.8 and/or produces less than 6 wt % fines after 5 hours ASTM Air Jet Attrition testing, due to formation via: preparing a nitrate solution by forming at least one metal slurry and combining the at least one metal slurry with a nitric acid solution; combining the nitrate solution with a basic solution to form a precipitate; structurally promoting the precipitate with at least one source of silicon to form a promoted mixture, wherein promoting comprises combining the precipitate with (a) silicic acid and one or more component selected from the group consisting of non-crystalline silicas, crystalline silicas, and sources of kaolin or (b) a component selected from the group consisting of non-crystalline silicas and sources of kaolin, in the absence of silicic acid; and spray drying the promoted mixture to produce catalyst having a desired particle size. | 09-18-2014 |
20150023842 | PROTECTED FISCHER-TROPSCH CATALYST AND METHOD OF PROVIDING SAME TO A FISCHER-TROPSCH PROCESS - A method of preparing a spray dried catalyst by combining spray dried catalyst particles with wax so the spray dried catalyst particles are coated with wax, yielding wax coated catalyst particles, and shaping the wax coated catalyst to provide shaped wax coated catalyst. A method of activating Fischer-Tropsch catalyst particles containing oxides by contacting the catalyst particles with a reducing gas in an activation vessel to produce an activated catalyst, wherein contacting is performed in the absence of a liquid medium under activation conditions. A system for activating a Fischer-Tropsch catalyst containing an activation reactor configured to introduce an activation gas to a fixed or fluidized bed of the Fischer-Tropsch catalyst in the absence of a liquid medium and at least one separation device configured to separate a gas stream comprising entrained catalyst fines having an average particle size below a desired cutoff size from the activation reactor. | 01-22-2015 |
20150251167 | PROMOTED, ATTRITION RESISTANT, SILICA SUPPORTED PRECIPITATED IRON CATALYST - A structurally promoted precipitated catalyst containing crystalline silica, at least one chemical promoter selected from the group consisting of alkali metals, and iron, the structurally promoted precipitated catalyst comprising maghemite and hematite catalytic phases, and exhibiting a main reduction peak temperature, as determined by TPR, in the range of from about 210° C. to about 350° C. A method of producing the structurally promoted precipitated catalyst is also provided. | 09-10-2015 |
Melik Demirel, State College, PA US
Melik C. Demirel, State College, PA US
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20080268226 | NANOPOROUS THIN FILMS AND MULTI-FUNCTIONAL LAYERS VIA SPATIALLY ORGANIZED POLYMERS - A spatially organized polymer nanostructured thin film and a ligand adsorbate attached to the polymer nanostructured thin film and, optionally, an additional material or materials attached to the ligand adsorbate. A method for forming a structure by: providing a spatially organized polymer nanostructured thin film and a ligand adsorbate, and adsorbing the ligand adsorbate onto the thin film and, optionally, binding additional material or materials to the ligand adsorbate. | 10-30-2008 |
20090257056 | SURFACE ENHANCED RAMAN DETECTION ON METALIZED NANOSTRUCTURED POLYMER FILMS - Disclosed herein is a structure having a spatially organized polymer nanostructured thin film and a metal coating on the film. The thin film is made by directing a monomer vapor or pyrolyzed monomer vapor towards a substrate at an angle other than perpendicular to the substrate, and polymerizing the monomer or pyrolyzed monomer on the substrate. | 10-15-2009 |
20090269587 | HYDROPHOBIC NANOSTRUCTURED THIN FILMS - Provided herein are the polymers shown below. The value n is a positive integer. R | 10-29-2009 |
Nejdat Demirel, Pessac FR
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20110148542 | TRANSFORMER AND METHOD FOR USING SAME - Method for improving the symmetry of the differential output signals of an integrated transformer of the symmetric-asymmetric type comprising an inductive primary circuit and an inductive secondary circuit, characterized in that the capacitive coupling between the primary and secondary circuits is reduced. | 06-23-2011 |
20150372649 | SIGNAL AMPLIFICATION SYSTEM - An input signal amplification system comprises at least two different means of amplifying input signals in order to obtain amplified signals. It also comprises at least one means of summing amplified signals, and dynamic means of activating or deactivating one or more of the amplifying means based on input signals. | 12-24-2015 |
Suleyman Demirel, Ann Arbor, MI US
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20110119037 | PRODUCTION OPTIMIZATION FOR OILFIELDS USING A MIXED-INTEGER NONLINEAR PROGRAMMING MODEL - A system performs production optimization for oilfields using a mixed-integer nonlinear programming (MINLP) model. The system uses an offline-online approach to model a network of interdependent wells in an online network simulator while modeling multiple interdependent variables that control performance as an offline MINLP problem. The offline model is based on production profiles established by assuming decoupled wells in the actual network of wells. In one example, an amount of lift-gas to inject and settings for subsurface chokes are optimized. An offline solver optimizes variables through the MINLP model. Offline results are used to prime the online network simulator. Iteration between the offline and online models results in a convergence, at which point values for the interdependent variables are communicated to the real-world oilfield to optimize hydrocarbon production. Priming the online model with results from the offline model drastically reduces computational load over conventional techniques. Additional techniques anneal initial data starting points, smooth pressure differences, and adapt constraint values to further reduce computational intensity. | 05-19-2011 |
20120095603 | LIFT-GAS OPTIMIZATION WITH CHOKE CONTROL - A method of optimizing production of wells using choke control includes generating, for each well, an intermediate solution to optimize the production of each well. The generating includes using an offline model that includes a mixed-integer nonlinear program solver and includes using production curves based on a choke state and a given wellhead pressure. The method further includes calculating, using a network model and the intermediate solution of each well, a current online wellhead pressure for each well. The method further includes setting the intermediate solution as a final solution based on determining that a difference between the current online wellhead pressure of each well and a prior online wellhead pressure of each well is less than a tolerance amount. The method further includes adjusting, using the final solution of each well, at least one operating parameter of the wells. | 04-19-2012 |
Sulyman Demirel, Ann Arbor, MI US
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20140156238 | OPTIMIZATION WITH A CONTROL MECHANISM USING A MIXED-INTEGER NONLINEAR FORMULATION - A method of optimizing production of wells using choke control includes generating, for each well, an intermediate solution to optimize the production of each well. The generating includes using an offline model that includes a mixed-integer nonlinear program solver and includes using production curves based on a choke state and a given wellhead pressure. The method further includes calculating, using a network model and the intermediate solution of each well, a current online wellhead pressure for each well. The method further includes setting the intermediate solution as a final solution based on determining that a difference between the current online wellhead pressure of each well and a prior online wellhead pressure of each well is less than a tolerance amount. The method further includes adjusting, using the final solution of each well, at least one operating parameter of the wells. | 06-05-2014 |