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| Number | Title | Issue Date |
| 8173090 | Sorbent use with oxyfuel sour compression Sulfur dioxide (SO2) is removed from carbon dioxide feed gas comprising SO2 as a contaminant by maintaining the carbon dioxide feed gas at an elevated pressure in contact with an alkaline sorbent for a period of time sufficient to react said al... | 05/08/2012 |
| 8121984 | Method and system for archiving biomedical data generated by a data collection device A method for archiving biomedical data generated by a data collection device, includes the steps of automatically determining a data format in which the collection device is configured to store the biomedical data onto a computer-readable storage medium, based on th... | 02/21/2012 |
| 8088196 | Purification of carbon dioxide Carbon dioxide and oxygen are separated from a feed gas, preferably derived from flue gas from an oxyfuel combustion process, by diffusion across at least one membrane in a membrane separation system to produce separated carbon dioxide gas comprising oxygen, which i... | 01/03/2012 |
| 8073870 | Methods for storing data A method for storing data includes the steps of receiving a metadata parameter from a first user, the parameter being associated with a property in a database containing a plurality of data records, and storing the parameter. The method also includes the step of pro... | 12/06/2011 |
| 8073218 | Method for detecting bio signal features in the presence of noise A computer-based method for detecting features in a digitally sampled biological (bio) signal includes the steps of applying a wavelet transform to the bio signal to generate a list of wavelet transform coefficients, ranking the coefficients according to value or fr... | 12/06/2011 |
| 8029603 | Pressure swing adsorption cycle for ozone production A pressure swing adsorption cycle designed to reduce the variations in ozone concentration, and produce a higher average ozone concentration, in a product gas stream throughout the cycle. The cycle includes a relatively long air sweep stage and provides for the over... | 10/04/2011 |
| 8025860 | Removal of acid mists Acid mist may be removed efficiently from a gas stream using at least one fiber bed mist eliminator operating at elevated pressure of typically at least 2 bar (0.2 MPa), e.g. at about 4 bar (0.4 MPa) to about 50 bar (5 MPa). The invention has particular application ... | 09/27/2011 |
| 8016918 | Performance stability in rapid cycle pressure swing adsorption systems Pressure swing adsorption process for producing oxygen comprising (a) providing at least one adsorber vessel having a first layer of adsorbent adjacent the feed end of the vessel and a second layer of adsorbent adjacent the first layer, wherein the surface area to v... | 09/13/2011 |
| 8012446 | Recycle TSA regen gas to boiler for oxyfuel operations NO2 may be removed from a carbon dioxide feed gas comprising NOx and at least one “non-condensable” gas as contaminants by passing the feed gas at a first elevated pressure through a first adsorption system that selectively adsorbs at least... | 09/06/2011 |
| 7947118 | Containerized gas separation system Containerized gas separation system comprising (a) a container having an interior, an exterior, and an exterior volume defined by the exterior dimensions of the container and (b) a pressure swing adsorption system installed in the interior of the container and adapt... | 05/24/2011 |
| 7909913 | Gas purification by adsorption of hydrogen sulfide Hydrogen sulfide is removed from a hydrogen rich gas stream using adsorbents having a low loss of carbon dioxide adsorption capacity upon sulfur loading including high purity silica gels, titania or highly cross-linked, non-chemically reactive resins. The adsorbents... | 03/22/2011 |
| 7909898 | Method of treating a gaseous mixture comprising hydrogen and carbon dioxide Hydrogen (H2) gas and crude carbon dioxide (CO2) gas are separated from a gaseous mixture thereof. Combustible gas(es) in the crude CO2 gas are combusted to produce heat, at least a portion of which is recovered by indirect heat exch... | 03/22/2011 |
| 7846237 | Cyclical swing adsorption processes The concentration of adsorbate in the feed gas to an on-stream bed of a cyclical swing adsorption process is monitored and the data processed to predict the time required to complete the on-stream mode of that bed and the purge flow rate and/or other regeneration mo... | 12/07/2010 |
| 7854793 | Pressure swing adsorption system with indexed rotatable multi-port valves Pressure swing adsorption system comprising two or more vessels, each having a feed end, a product end, and adsorbent material adapted to adsorb one or more components from a multi-component feed gas mixture; piping adapted to (1) introduce the feed gas mixture into... | 12/21/2010 |
| 7850763 | Purification of carbon dioxide Impure carbon dioxide (“CO2”) comprising a first contaminant selected from the group consisting of oxygen (“O2”) and carbon monoxide (“CO”) is purified by separating expanded impure carbon dioxide liquid in a mass transfer separatio... | 12/14/2010 |
| 7819951 | Purification of carbon dioxide A first contaminant selected from oxygen and carbon monoxide is removed from impure liquid carbon dioxide using a mass transfer separation column system which is reboiled by indirect heat exchange against crude carbon dioxide fluid, the impure liquid carbon dioxide ... | 10/26/2010 |
| 7759288 | Co-formed base-treated aluminas for water and COremoval Base treated aluminas exhibit improved CO2 capacity over untreated aluminas. Base treated aluminas prepared by physically mixing alumina and base during forming have (1) a higher surface area, (2) less hydrothermal aging, (3) improved CO2 capac... | 07/20/2010 |
| 7754067 | Process and apparatus for upgrading heavy hydrocarbons using supercritical water Heavy hydrocarbons are upgraded more efficiently to lighter, more valuable, hydrocarbons with lower amounts of solid carbonaceous by-products in supercritical water using two heating stages, the first stage at a temperature up to about 775K and the second stage at a... | 07/13/2010 |
| 7712331 | System to increase capacity of LNG-based liquefier in air separation process A system is set forth to increase the capacity of an LNG-based liquefier in a cryogenic air separation unit wherein, in a low production mode, the nitrogen that is fed to the LNG-based liquefier consists only of at least a portion of the high pressure nitrogen from ... | 05/11/2010 |
| 7669594 | Volume flow controller A volume flow controller (1) for controlling the flow of a gas mixture of variable proportions through a conduit (3) has a valve means (5) for regulating the flow of gas through the conduit, a drive means (9) for driving the valve means, ... | 03/02/2010 |
| 7606681 | System and method for process monitoring Systems and methods are provided that allow a user to monitor, diagnose, and configure a process. A user interface may be presented that displays data received from process monitors, sensors, and multivariate models. The user interface may be interactive, allowing a... | 10/20/2009 |
| 7604222 | Divided wall exchange column A divided wall exchange column includes a dividing wall strengthened by stiffening members and/or a double wall design to better withstand pressure differentials and minimize temperature differentials. When a double wall is used, cost of manufacture and installation... | 10/20/2009 |
| 7526961 | Method and apparatus for monitoring fluid pressure A method and apparatus for monitoring the pressure of a fluid within a rigid vessel are disclosed. A preferred method comprises monitoring the capacitance of a capacitor comprising a deformable resilient solid dielectric separating first and second conductive elemen... | 05/05/2009 |
| 7520143 | Dual stage nitrogen rejection from liquefied natural gas Nitrogen is removed from a liquefied natural gas feed (41) by a two stage separation in which the liquefied natural gas (41) is first fractionated (23) to provide a first nitrogen-enriched overhead vapour stream (46) and a nitrogen-contai... | 04/21/2009 |
| 7458807 | Gas heater, a gas supply apparatus and a method of providing gas The invention provides a gas heater for connection to a heat source and a pressurized gas source, the gas heater comprising: a jacket having an inlet and an outlet and defining a cavity there between; a porous heat exchanger extender within said cavity, and means fo... | 12/02/2008 |
| 7437889 | Method and apparatus for producing products from natural gas including helium and liquefied natural gas The present invention relates to a process and apparatus for producing crude helium, liquefied natural gas product, and synthesis gas from natural gas. A natural gas comprising helium and methane is cooled to produce cooled natural gas. At least a portion of the hel... | 10/21/2008 |
| 7434580 | Monitoring medical gas xenon concentration using ultrasonic gas analyser The concentration of xenon, in a medical gas mixture of xenon as an active component with a known composition of oxygen and, optionally, nitrogen and/or helium recirculating through a medical device (103) in which carbon dioxide is introduced into the mixture... | 10/14/2008 |
| 7431033 | Gas dispensing and recovery apparatus A container (1) having a first compartment (3) and a second compartment (5) separated by a movable gas impermeable partition (7) is used for storing and dispensing a gas for use in a process and receiving and storing a gas recovered from ... | 10/07/2008 |
| 7422197 | Divided wall exchange column A divided wall exchange column includes a dividing wall strengthened by stiffening members and/or a double wall design to better withstand pressure differentials and minimize temperature differentials. When a double wall is used, cost of manufacture and installation... | 09/09/2008 |
| 7416716 | Purification of carbon dioxide SO2 and/or NOx are removed from gaseous CO2 at elevated pressure(s) in the presence of molecular oxygen and water and, when SO2 is to be removed, NOx, to convert SO2 to sulfuric acid and/or NOx | 08/26/2008 |
| 7413595 | Control scheme for hybrid PSA/TSA systems An improved control scheme is set forth for an adsorption process that removes water and carbon dioxide (CO2) from a feed gas using a hybrid of both temperature swing (i.e. TSA) and pressure swing (PSA) to regenerate the adsorbent. The control scheme comp... | 08/19/2008 |
| 7357378 | Divided wall exchange column A divided wall exchange column includes a dividing wall strengthened by stiffening members and/or a double wall design to better withstand pressure differentials and minimize temperature differentials. When a double wall is used, cost of manufacture and installation... | 04/15/2008 |
| 7308805 | Integrated multiple-loop refrigeration process for gas liquefaction Method gas liquefaction which comprises cooling a feed gas stream successively through at least two heat exchange zones, wherein cooling is provided by respective vaporizing refrigerants, and wherein the refrigerant in the coldest temperature range is only partially... | 12/18/2007 |
| 7278264 | Process to convert low grade heat source into power using dense fluid expander A process to convert heat into power is set forth wherein, to make the cycle more suitable to low grade heat, the working fluid remains substantially in the liquid state after being heat exchanged against the heat source and a dense fluid expander is used in place o... | 10/09/2007 |
| 7267329 | Alternating conventional and high capacity packing within the same section of an exchange column An assembly in an exchange column includes a plurality of generally vertically adjacent layers of structured packing. Each layer includes a plurality of generally horizontally adjacent structured packing elements, each of which has an upper edge and a lower edge. Ea... | 09/11/2007 |
| 7234691 | Radial-crossflow distillation trays for divided wall column applications An assembly of trays in a divided wall column having an inner column wall, a dividing wall, and an interior space includes: a first tray having at least one radial downcomer adjacent the dividing wall and extending radially toward the inner column wall a first subst... | 06/26/2007 |
| RE39637 | Hybrid cycle for the production of liquefied natural gas Refrigeration process for gas liquefaction which utilizes one or more vaporizing refrigerant cycles to provide refrigeration below about −40° C. and a gas expander cycle to provide refrigeration below about −100° C. Each of these two types of refrigerant syste... | 05/22/2007 |
| 7194317 | Fast plant test for model-based control A method and apparatus for designing perturbation signals to excite a number of input variables of a system, in order to test that system for the purpose of obtaining models for the synthesis of a model-based controller. The method begins with providing input parame... | 03/20/2007 |
| 7127914 | Hybrid gas liquefaction cycle with multiple expanders Method for gas liquefaction comprising cooling a feed gas by a first refrigeration system in a first heat exchange zone and withdrawing a substantially liquefied stream therefrom, further cooling the substantially liquefied stream by indirect heat exchange with one ... | 10/31/2006 |
| 7086251 | Integrated multiple-loop refrigeration process for gas liquefaction Method for liquefying a gas which comprises cooling a feed gas stream successively through first and second temperature ranges to provide a liquefied product, wherein refrigeration for cooling the feed gas stream in the first temperature range is provided by a first... | 08/08/2006 |
