Paxton Corporation, Paramount Resources Ltd. and Clean Energy Systems | Date: 2011-08-31
This invention provides a new process to generate steam directly from untreated water produced simultaneously with thermally recovered crude oil, and to inject the steam and combustion products into a hydrocarbon reservoir to recover hydrocarbons and to sequester a portion of the carbon dioxide produced during the creation of steam. The invention removes the ongoing additional water requirements for thermal oil recovery and the need for surface treating of produced water for re-use, yielding improved process efficiencies, reduced environmental impact, and improved economic value.
Soundarrajan N.,Pennsylvania State University |
Rozelle P.L.,Clean Energy Systems |
Pisupati S.V.,Pennsylvania State University
Fuel | Year: 2012
A model has been developed to predict the flow rates of solids (bottom ash and flyash) out of a circulating fluidized bed (CFB) boiler, using fuel and sorbent properties and the plant solids feed data. Fuel particles were separated by density and size classes, and characterized. The attrition of coarse fuel particles that form flyash after combustion is quantified by means of an attrition coefficient for each particle class. The model was used to calculate attrition coefficients for the heavier (higher mineral content) fuel particles which were obtained by gravity separation (float-sink analysis). Toward this end, solids analyses and operating data from two commercial CFB power plants in Pennsylvania were used. This model can be of use for assessing the ability of the flyash and bottom ash handling systems in a CFB power plant to handle the ash streams produced when a plant changes fuels. © 2008 Elsevier Ltd. All rights reserved.
Feng J.,Clean Energy Systems |
Wang Z.,Clean Energy Systems |
Li L.,Clean Energy Systems |
Li Z.,Clean Energy Systems |
Ni W.,Clean Energy Systems
Applied Spectroscopy | Year: 2013
A nonlinearized multivariate dominant factor-based partial least-squares (PLS) model was applied to coal elemental concentration measurement. For C concentration determination in bituminous coal, the intensities of multiple characteristic lines of the main elements in coal were applied to construct a comprehensive dominant factor that would provide main concentration results. A secondary PLS thereafter applied would further correct the model results by using the entire spectral information. In the dominant factor extraction, nonlinear transformation of line intensities (based on physical mechanisms) was embedded in the linear PLS to describe nonlinear self-absorption and inter-element interference more effectively and accurately. According to the empirical expression of self-absorption and Taylor expansion, nonlinear transformations of atomic and ionic line intensities of C were utilized to model self-absorption. Then, the line intensities of other elements, O and N, were taken into account for inter-element interference, considering the possible recombination of C with O and N particles. The specialty of coal analysis by using laser-induced breakdown spectroscopy (LIBS) was also discussed and considered in the multivariate dominant factor construction. The proposed model achieved a much better prediction performance than conventional PLS. Compared with our previous, already improved dominant factor-based PLS model, the present PLS model obtained the same calibration quality while decreasing the root mean square error of prediction (RMSEP) from 4.47 to 3.77%. Furthermore, with the leave-one-out cross-validation and L-curve methods, which avoid the overfitting issue in determining the number of principal components instead of minimum RMSEP criteria, the present PLS model also showed better performance for different splits of calibration and prediction samples, proving the robustness of the present PLS model. © 2013 Society for Applied Spectroscopy.
Clean Energy Systems | Date: 2013-10-08
Substantially pure high pressure steam is produced within a high pressure heat exchanger. Heat for the high pressure heat exchanger is provided from an outlet of an oxy-fuel combustion gas generator which discharges a steam/CO_(2 )mixture at high pressure and temperature. The gas generator combusts oxygen and hydrocarbon fuel and mixes with water which can include contaminates therein in the form of dissolved solids or hydrocarbons. A separator is typically provided downstream of the gas generator and upstream of the heat exchanger and the steam/CO_(2 )mixture is discharged from the gas generator at saturation temperature. A water fraction of the steam/CO_(2 )mixture is discharged from the separator along with dissolved solids in concentrated brine form. The water heated into steam by the heat exchanger can be at least partially water separated within a condenser downstream of the heat exchanger.
Clean Energy Systems | Date: 2012-09-25
A method is provided for hydrogen production from a hydrogen and carbon containing fuel combusted within an oxyfuel combustor. The oxyfuel combustor combusts hydrogen and carbon containing fuel with oxygen at a non-stoichiometric ratio, typically fuel rich. In such an operating mode, products of combustion include steam, carbon dioxide, carbon monoxide and hydrogen. These products of combustion are then passed through a hydrogen separator. Remaining products of combustion can be optionally combusted at a stoichiometric ratio with oxygen in a second oxyfuel combustor discharging substantially only steam and carbon dioxide. A turbine or other expander can be provided downstream from the gas generator to produce power and eliminate carbon monoxide from the system. The system can be operated in a second mode where the gas generator combusts the fuel with oxygen at a stoichiometric ratio to maximize electric power generation without hydrogen production at periods of peak power demand.
Clean Energy Systems | Date: 2013-09-03
A gas generator is provided with a combustion chamber into which oxygen and a hydrogen containing fuel are directed for combustion therein. The gas generator also includes water inlets and an outlet for a steam and CO_(2 )mixture generated within the gas generator. The steam and CO_(2 )mixture can be used for various different processes, with some such processes resulting in recirculation of water from the processor back to the water inlets of the gas generator. In one process a hydrocarbon containing subterranean space is accessed by a well and the steam and CO_(2 )mixture is directed into the well to enhance removability of hydrocarbons within the subterranean space. Fluids are then removed from the subterranean space include hydrocarbons and water, with a portion of the hydrocarbons then removed in a separator/recovery step. The resulting hydrocarbon removal system can operate with no polluting emissions and with no water requirements.
Clean Energy Systems | Date: 2012-02-20
Clean Energy Systems | Date: 2012-01-13
News Article | December 28, 2012
Clean Energy Systems has advanced a superior power generation concept. Using aerospace technology, a high energy gas generation system has been developed that powers turbines which in turn produce electricity with no emissions or pollutants.