Abstract: As described, a neural network based fault detection and analysis tool may be integrated with a physical (or semi physical) model based fault detection and analysis tool. The physical modeling tool provides a mathematical model of plant processes, e.g., a set of mass/energy balance equations modeling the systems at a specific plant. In contrast, the neural network develops a model of a given set of sensors from process data. One advantage of the neural network based tool is that it does not require fundamental knowledge of the process. However, the neural network is only valid for the conditions for which it was trained (i.e., conditions represented by a set of training data). Therefore, the neural network will occasionally need to be re-trained as the process conditions change. In contrast, the physical modeling tool based tool does not need to be retrained and remains valid for all process conditions accounted for in the fundamental models.
Type:
Application
Filed:
December 10, 2010
Publication date:
June 14, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Abstract: Process for the preparation of a catalytic specie consisting essentially of a metallic support, which is coated with a ceramic active phase layer, mainly compound of the general formula (I): [RhxNiyMglAlm(OH)2]z+(An?z/n) kH2O.
Type:
Application
Filed:
December 13, 2011
Publication date:
June 14, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Daniel Gary, Pascal Del-Gallo, Francesco Basile, Angelo Vaccari, Giuseppe Fornasari, Valentina Rosetti, Erika Scavetta, Domenica Tonelli
Abstract: Techniques are described for monitoring the performance of advanced process control (APC) systems used to control complex industrial processes. By correlating an alarm status of the APC system with an alarm status associated with the service factor (or service factor thresholds), a plant operator can understand how well the APC system performs over time, as well as identify when operator intervention may be required (or alternatively, may be the source of poor plant performance). Accordingly, embodiments of the invention can significantly impact both the reliability and efficiency of complex industrial process, e.g., the production of industrial gases using air separation units (ASUs) and steam methane reformer (SMR) furnaces.
Type:
Application
Filed:
December 14, 2010
Publication date:
June 14, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Amogh Vishwanath Prabhu, Geraldine Carlos
Abstract: The invention relates to a process and device for cutting materials, such as metals, concrete, wood, plastics or any other type of material, by means of a jet of cryogenic fluid at very high pressure with added abrasive, in particular corundum. Materials can be cut using a disk cutter (concrete, stone, metals, etc.), with a saw (metals, wood, plastics, etc.), by laser beam (metals, plastics, etc.), using a plasma jet (metals), using an ultrahigh pressure (UHP) water jet with or without abrasives (any type of material).
Type:
Application
Filed:
June 1, 2010
Publication date:
June 7, 2012
Applicant:
L' Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
Inventors:
Jacques Quintard, Frédéric Richard, Charles Truchot
Abstract: On cold filling of pressure containers the filling gas is cooled before introduction into the pressure container to be filled. On completion of the filling process the pressure container is sealed in a pressure-tight manner. As the gas warms up the pressure in the pressure container rises rapidly. According to the invention, the pressure container is cooled before the introduction of the filling gas. The filling gas cools rapidly by means of heat transfer to the pressure container, whereby the filling capacity of the pressure container is considerably increased. Said method is particularly suitable for the filling of small tanks, in particular, for gas-driven vehicles and fuel-cell systems.
Type:
Grant
Filed:
February 18, 2002
Date of Patent:
June 5, 2012
Assignee:
L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
Abstract: The invention relates to a method for the deoxygenation in a chemical loop of smokes resulting from oxidation-combustion reactions, that comprises: a first step during which the smokes are stripped from their oxygen by trapping the same by the oxidation of an oxygen-carrier material, thus producing a main flow of smokes with a reduced oxygen content; and a second step for also producing smokes that can join the main smoke flow and during which the material oxidised during the first step is reduced and regenerated by reaction with the fuel in order to be used again during said step. The invention also relates to an apparatus for implementing said method.
Type:
Application
Filed:
July 24, 2008
Publication date:
May 31, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Ivan Sanchez-Molinero, Christophe Claeys, Guillaume De Smedt, Simon Jallais
Abstract: The invention relates to a process for manufacturing clinker from a raw mix, implementing the following: preheating of the raw mix by combustion flue gases; precalcination of the raw mix; and calcination of the precalcined raw mix in a rotary kiln, in which process the precalcination and the calcination in the rotary kiln produce combustion flue gases that contain CO2, in which the combustion flue gases created by the precalcination undergo a CO2-removal treatment without said flue gases mixing with the combustion flue gases created by the calcination in the rotary kiln.
Type:
Grant
Filed:
October 22, 2007
Date of Patent:
May 29, 2012
Assignee:
L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
Abstract: The invention relates to equipment for separating air by cryogenic distillation, including: a double air separation column; an exchange line (91); a hot air supercharger (CI) and a cold air supercharger (C2); a first turbine (TI) and a second turbine (T2), each of which is coupled to one of the superchargers; means for bringing all the air to a high pressure that is greater than the mean pressure; means for purifying the air at said high pressure; means for dividing the purified air into two fractions and sending one fraction thereof to the hot air supercharger and one fraction to the cold air supercharger after cooling in the exchange line; means for feeding the second air fraction from the cold air supercharger back into the exchange line; means for sending at least one pressurized liquid from one of the columns into the exchange line; a valve (4, 5); means for sending the non-supercharged air, purified at a high pressure, to the exchange line, so as to be cooled therein, and then to the valve; and means fo
Type:
Application
Filed:
July 16, 2010
Publication date:
May 17, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Frederic Judas, Herve Le Bihan, Patrick Le Bot
Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.
Type:
Application
Filed:
January 26, 2012
Publication date:
May 17, 2012
Applicants:
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE, SUD-CHEMIE INC.
Inventors:
Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
Abstract: The present invention provides a process for recovering hydrogen and carbon dioxide from a process stream (1) of a process unit (0) wherein the process stream (1) contains at least carbon dioxide, hydrogen and methane. In the process, the process stream (1) is optionally compressing in a first compressor (2) before being cooled in a heat exchanger (3) to a temperature equal to or less than ?10° C. Next, the cooled process stream (1) is separated and purified in a carbon dioxide separation unit (4) to produce a carbon dioxide rich liquid stream (6) and a carbon dioxide lean non-condensable stream (5) with the carbon dioxide rich liquid stream (6) being withdrawn as a carbon dioxide product for further use.
Type:
Application
Filed:
December 21, 2010
Publication date:
May 17, 2012
Applicants:
Air Liquide Large Industries U.S. LP, L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Paul Terrien, Trapti Chaubey, Purushottam V. Shanbhag, Bhadra S. Grover, Dennis A. Vauk, Arthur Darde
Abstract: The present invention provides a method to more efficiently recover hydrogen and carbon dioxide as well as a design for carbon dioxide capture from syngas that allows for the simultaneous production of medium to high amounts of hydrogen and the capture of at least 90% of the carbon dioxide in the syngas as a part of the production of hydrogen in a hydrogen generation plant. Through the use of a combination of hydrogen selective membranes and carbon dioxide selective membranes together with a carbon dioxide separation unit it is possible to increase recovery of hydrogen and carbon dioxide and improved process efficiency of the hydrogen generation plant.
Type:
Application
Filed:
December 21, 2010
Publication date:
May 17, 2012
Applicants:
Air Liquide Large Industries U.S. LP, L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Paul Terrien, Trapti Chaubey, Purushottam V. Shanbhag, Bhadra S. Grover, Dennis A. Vauk, Arthur Darde
Abstract: An additive mixture for fuels including a) at least one N-formal, b) at least one antioxidant and c) at least one corrosion inhibitor. The additive mixture ensures that the additized fuels and lubricants have biocidal and corrosion-inhibiting additization, especially when they include proportions of renewable raw materials, such as biodiesel, and when they are in contact with copper-containing surfaces.
Type:
Application
Filed:
June 21, 2010
Publication date:
May 10, 2012
Applicant:
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORG
Inventors:
Wolfgang Beilfuss, Ralf Grastke, Jennifer Knopf, Ingo Krull
Abstract: The invention relates to a method for producing gaseous oxygen by adsorption from compressed air, comprising: a) using at least one adsorption unit for generating gaseous oxygen having a purity greater than or equal to a predetermined purity threshold value (VPS) and according to a variable production flow rate (Dp); b) recovering the gaseous oxygen produced in a); c) measuring the purity of the gaseous oxygen (Pp) produced in step a) and comparing same with a preset purity threshold value (VPS); and d) adjusting the oxygen production flow rate (Dp) on the basis of the comparison of step c) such that: i) reducing the oxygen production flow rate (Dp) when the oxygen purity (Pp) measured in step c) is such that VPS>Pp; or ii) increasing the production flow rate (Dp) when the oxygen purity determined in step c) is such that VPS<Pp in order to obtain a gaseous oxygen purity (Pp) such that VPS=Pp+X, with X<0.5%, X being the standard deviation.
Type:
Application
Filed:
June 7, 2010
Publication date:
May 3, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Ftude Et L'Exploitation Des Procedes Georges Claude
Inventors:
Joseph Pierquin, Sylvain Fourage, Olivier Roy
Abstract: A method of purifying a gaseous mixture rich in hydrogen and in carbon monoxide, commonly termed an H2/CO mixture or syngas, by adsorption prior to treating it cryogenically with a view to producing a CO-rich fraction, and/or one or more H2/CO mixtures of determined content, such as a mixture of 50 mol % H2/50 mol % CO and generally a hydrogen-rich fraction is provided.
Type:
Grant
Filed:
January 10, 2008
Date of Patent:
May 1, 2012
Assignee:
L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
Inventors:
Christian Monereau, Guillaume Rodrigues, Ingrid Bellec, François Demoisy
Abstract: The present invention provides a process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by FTS reactions in a syngas treatment unit by utilizing heat exchangers and optionally associated pipes that are substantially fabricated of a material selected from the group consisting of chromium containing alloys and carbon steel for heating up gas streams having a carbon monoxide partial pressure greater than one bar obtained from a front end purification unit/cold box unit.
Type:
Grant
Filed:
November 30, 2009
Date of Patent:
May 1, 2012
Assignee:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Abstract: The present invention provides a process for decreasing or eliminating unwanted hydrocarbon and oxygenate products caused by FTS reactions in a syngas treatment unit by utilizing heat exchangers and optionally associated pipes that are substantially fabricated of a material selected from the group consisting of chromium containing alloys and carbon steel for heating up gas streams having a carbon monoxide partial pressure of less than or equal to one bar and obtained from a front end purification unit/cold box unit.
Type:
Grant
Filed:
November 30, 2009
Date of Patent:
April 24, 2012
Assignee:
L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
Inventors:
Trapti Chaubey, Yudong Chen, Robert Gagliano
Abstract: A heat exchanger with brazed plates including a stack of parallel plates defining a plurality of generally flat fluid circulating passages, closure bars which delimit the passages and distributing means for distributing a fluid to each passage of a first series of passages and means for conveying another fluid to a second series of passages where at least one passage contains organized exchanging structures which form a plurality of channels in the width of the passage and also at least three channels in the height of the passage is provided. The invention is useful for air separation by cryogenic distillation.
Type:
Application
Filed:
October 5, 2011
Publication date:
April 19, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Abstract: A method for removing dissolved oxygen from a plant product such as grapes or the like and for maintaining it in a controlled atmosphere when it is placed in mechanical means for harvesting, transport and storage, said means comprising a collection tank which receives the plant product which is present in a solid and a liquid state in this tank, said removal and controlled atmosphere being provided by using an inert gas, said tank having a lower portion or first part and a second upper part or portion into which the product is introduced when being placed in the tank. Provision is made for the use of said inert gas in an initial solid state, its subsequent sublimation and the interaction of the gas in gaseous state thus produced with said product inside the tank.
Type:
Application
Filed:
March 2, 2010
Publication date:
April 19, 2012
Applicant:
L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
Abstract: Disclosed are cleaning solvents and cleaning methods for metallic compounds deposited on the equipment that supplies organometallic compounds to the manufacturing tool in the photovoltaic industry or the semiconductor industry. The cleaning solvents and the cleaning methods disclosed not only selectively remove the metallic compound without corroding the equipment, but also improve the ordinary cleaning process. Moreover, the cleaning solvents and the cleaning methods disclosed improve maintenance costs for the supply system because the equipment may be cleaned without being detached from the supply system.
Type:
Grant
Filed:
October 24, 2011
Date of Patent:
April 17, 2012
Assignee:
L'Air Liquide Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude