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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 10. Отображено 10.
04-10-2016 дата публикации

Hydrogen dispensing process and system

Номер: US0009458968B2
Автор: Nikunj Gupta, GUPTA NIKUNJ, Gupta Nikunj
Принадлежит: Shell Oil Company, GUPTA NIKUNJ, SHELL OIL CO, Gupta Nikunj

The present invention provides a process for dispensing gaseous hydrogen, comprising the steps of: a) providing a first vessel comprising a first quantity of gaseous hydrogen at a pressure in the range of from 350 to 1000 bar absolute and a temperature in the range of from −20° C. to 50° C.; b) passing in the range of from 40 to 100 wt %, based on the weight of the first quantity, of the first quantity gaseous hydrogen from the first vessel through an isenthalpic valve to obtain a cold second quantity of gaseous hydrogen having a temperature in the range of from −100 to −20° C.; and c) dispensing the cold second quantity of gaseous hydrogen to a second vessel. In a further aspect the invention provides a system for dispensing gaseous hydrogen.

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Номер записи: 1
14-11-2013 дата публикации

METHOD FOR PRODUCING LIQUID HYDROGEN AND ELECTRICITY

Номер: US20130298570A1
Автор: Dickens Nigel Lawerence, Gupta Nikunj
Принадлежит:

The present invention provides a method for producing hydrogen and electricity utilizing a system suitable for producing liquid hydrogen and/or electricity. The system includes 1. A method for producing hydrogen and electricity , comprising providing a system suitable for producing liquid hydrogen and/or electricity , comprising at least:a) a gas reforming unit arranged to receive a natural gas feed and to reform a natural gas to produce a hydrogen-comprising gas;b) a electricity generation unit arranged to receive at least part of the hydrogen in the hydrogen-comprising gas and to convert the hydrogen to generate electricity; and during operation which system is arranged to export liquid hydrogen and/or electricity,', 'wherein:, 'c) a hydrogen liquefaction unit arranged to receive part of the hydrogen in the hydrogen-comprising gas and to liquefy the hydrogen to produce liquid hydrogen, which hydrogen liquefaction unit during operation is powered by at least part of the electricity produced by the electricity generation unit,'}i) during a first period, natural gas is provided to the gas reforming unit and the system is operated to export liquid hydrogen; andii) during a second period, natural gas is provided to the gas reforming unit and the system is operated to export electricity.2. A method according to claim 1 , wherein during the first period additional electricity is imported.3. A method according to claim 1 , whereini) during the first period, the system is operated to export liquid hydrogen and electricity; andii) during the second period, the system is operated to export electricity.4. A method according to claim 1 , whereini) during the first period, the system is operated to export liquid hydrogen and electricity; andii) during the second period, the system is operated to export liquid hydrogen and electricity.5. A method according to claim 1 , wherein during the first period claim 1 , the system suitable for producing liquid hydrogen and/or electricity ...

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Номер записи: 2
24-04-2014 дата публикации

HYDROGEN DISPENSING PROCESS AND SYSTEM

Номер: US20140110017A1
Автор: Gupta Nikunj
Принадлежит:

The present invention provides a process for dispensing gaseous hydrogen, comprising the steps of: a) providing a first vessel comprising a first quantity of gaseous hydrogen at a pressure in the range of from 350 to 1000 bar absolute and a temperature in the range of from −20° C. to 50° C.; b) passing in the range of from 40 to 100 wt %, based on the weight of the first quantity, of the first quantity gaseous hydrogen from the first vessel through an isenthalpic valve to obtain a cold second quantity of gaseous hydrogen having a temperature in the range of from −100 to −20° C.; and c) dispensing the cold second quantity of gaseous hydrogen to a second vessel. In a further aspect the invention provides a system for dispensing gaseous hydrogen. 1. A process for dispensing gaseous hydrogen , comprising the steps of:a) providing a first vessel comprising a first quantity of gaseous hydrogen at a pressure in the range of from 350 to 1000 bar absolute and a temperature in the range of from −20° C. to 50° C.;b) passing in the range of from 40 to 100 wt %, based on the weight of the first quantity, of the first quantity of gaseous hydrogen from the first vessel through an isenthalpic valve to obtain a cold second quantity of gaseous hydrogen having a temperature in the range of from −100 to −20° C.; andc) dispensing the cold second quantity of gaseous hydrogen to a second vessel.2. A process according to claim 1 , further comprising step d) providing further gaseous hydrogen to the first vessel to replace the hydrogen which was dispensed in step (c).3. A process according to claim 1 , wherein step (d) further comprises cooling the further gaseous hydrogen to a temperature in the range as defined in step (a) of .4. A process according to claim 1 , wherein the first vessel has a hydrogen capacity in the range of from 3 to 15 kg of hydrogen.5. A process according to claim 1 , wherein the second storage vessel is the hydrogen fuel tank of a vehicle.6. A process according to ...

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Номер записи: 3
20-08-2015 дата публикации

PROCESS FOR PRODUCING HYDROGEN AND GENERATING POWER

Номер: US20150233290A1
Автор: Gupta Nikunj, Kapoun Karel Martin, Lee Salvador Aldrett
Принадлежит:

A process for producing hydrogen and power comprises subjecting a gaseous hydrocarbon feedstock to an endothermic steam reforming reaction by contacting the feedstock, in a reaction zone, in the presence of steam, with catalyst to obtain a mixture comprising hydrogen and carbon monoxide; recovering hydrogen from the mixture; feeding fuel and oxidant to a turbine system comprising a compressor, combustion chamber and expansion turbine, wherein the compressor is coupled to the turbine, the oxidant is compressed in the compressor to obtain compressed oxidant, and the fuel is combusted with the compressed oxidant in the chamber to obtain a stream of combusted gas; feeding at least part of the stream to the turbine to generate power and to obtain a turbine flue gas; and providing heat for the reforming reaction from the combusted gas and/or the flue gas; and liquefaction of the recovered hydrogen by subjecting it to a liquefaction cycle. 1. A process for producing hydrogen and generating power comprising the following steps:(a) subjecting a gaseous hydrocarbon feedstock to an endothermic steam reforming reaction by contacting the hydrocarbon feedstock, in a steam reforming reaction zone, in the presence of steam, with a steam reforming catalyst under steam reforming conditions to obtain a gaseous mixture comprising hydrogen and carbon monoxide;(b) recovering hydrogen from the mixture;(c) feeding a fuel and an oxidant to a turbine comprising in series a compressor, a combustion chamber and an expansion turbine, wherein the compressor is coupled to the expansion turbine, wherein the oxidant is compressed in the in the compressor to obtain compressed oxidant and the fuel is combusted with the compressed oxidant in the combustion chamber to obtain a stream of combusted gas;(d) feeding at least part of the stream of combusted gas to the expansion turbine to generate power and to obtain a turbine flue gas;(e) providing heat for the endothermic reforming reaction by bringing a ...

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Номер записи: 4
05-11-2015 дата публикации

HYDROGEN DISPENSING SYSTEM AND METHOD THEREOF

Номер: US20150316211A1
Автор: Gupta Nikunj, SMITH Brad John
Принадлежит:

The invention provides a hydrogen dispensing system comprising: a feed vessel for storing liquid hydrogen having an inlet and an outlet; a flash drum having an inlet and an outlet; a dispenser for dispensing gaseous hydrogen at a pressure of greater than 300 bar, having an inlet and an outlet wherein the feed vessel outlet is in fluid communication with the flash drum inlet, the flash drum outlet is in fluid communication with the dispenser inlet and there is no compression apparatus between the feed vessel outlet and the dispenser outlet. The invention also provides a method of providing gaseous hydrogen to a vehicle. 1. A method of providing gaseous hydrogen to a vehicle comprising:a. storing a liquid hydrogen source in a feed vessel at a temperature of less than 30 K;b. passing a portion of the liquid hydrogen in the feed vessel to a first flash drum;c. passing a portion of the liquid hydrogen in the feed vessel to a second flash drum;d. providing sufficient heat to the first flash drum to convert at least a portion of the liquid hydrogen to gaseous hydrogen;e. passing the gaseous hydrogen from the first flash drum to a dispenser;f. when the pressure of the gaseous hydrogen from the first flash drum drops to below a first pressure, providing sufficient heat to the second flash drum filled with liquid hydrogen to convert at least a portion of the liquid hydrogen to gaseous hydrogen to provide gaseous hydrogen at or above the first pressure;g. passing the gaseous hydrogen from the second flash drum to the dispenser; andh. passing the gaseous hydrogen from the dispenser to the vehicle at a pressure of greater than 300 bar wherein no compression apparatus is used.2. A method as claimed in wherein the gaseous hydrogen is passed from the dispenser at a pressure of greater than 700 bar.3. A method as claimed in wherein the heat to the first and second flash drums is provided by exposure of the first and second flash drums to ambient temperatures.4. A method as claimed ...

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Номер записи: 5
09-11-2017 дата публикации

PROCESS FOR PRODUCING LIQUID HYDROGEN

Номер: US20170321332A1
Автор: Gupta Nikunj, PASFIELD Thomas Alexander
Принадлежит:

The invention relates to an integrated process for continuous production of liquid hydrogen, comprising (a) producing gaseous hydrogen by electrolysis; and (b) liquefying said gaseous hydrogen in a hydrogen liquefaction unit, which liquefaction unit is powered by energy essentially from renewable sources; and, (c) when additional power is needed, using electrical energy generated in a process in which electrical energy and hydrogen are co-generated by an integrated electrolysis process comprising: (d) electrolysing a metal salt or mixture of metal salts and water into the corresponding metal or metals, acid or acids, and oxygen (electricity storage phase), and (e) producing gaseous hydrogen and recovering electricity in a regeneration reaction of the metal (s) and acid(s) of step (d) (regeneration phase); wherein at least part of the gaseous hydrogen generated in step (e) is used in step (b) of the process. 2. The process of claim 1 , wherein the metal salt or mixture of metal salt is/are selected from ZnSO claim 1 , MgSO claim 1 , and/or MgCl claim 1 , and the like.3. The process of claim 2 , wherein the metal salt is ZnSO.4. The process of claim 1 , wherein the hydrogen and electricity products of step (e) are individually produced as needed “on-demand”.5. The process of claim 1 , wherein additional sources of electricity supply are used as back-up when the renewable power source is not available and/or electricity regenerated in step (e) is not enough.6. The process of claim 1 , wherein gaseous hydrogen is stored after step (e) and before liquefying the hydrogen.7. An integrated system for continuously producing liquid hydrogen claim 1 , comprising an energy inlet for feeding energy from renewable sources into an electrolysis system for co-generation of electrical energy and hydrogen claim 1 , which comprises an energy storage part and a regeneration part claim 1 , wherein the regeneration part of the electrolysis system has an outlet for hydrogen that is ...

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Номер записи: 6
06-01-2005 дата публикации

High performance fuel processing system for fuel cell power plant

Номер: WO2004087304A3
Автор: Nikunj Gupta, Shubhro Ghosh, Thomas Henry Vanderspurt, Ying She, Zissis Dardas
Принадлежит: Nikunj Gupta, Shubhro Ghosh, Thomas Henry Vanderspurt, UTC Fuel Cells LLC, Ying She, Zissis Dardas

A fuel processing system (FPS) (110) is provided for a fuel cell power plant (115) having a fuel cell stack assembly (CSA) (56). The FPS (110) includes a water gas shift (WGS) reaction section (12, 120) for receiving hydrocarbon reformate containing carbon monoxide (CO) and reducing the concentration of CO in the reformate via the shift reaction, and a preferred oxidation (PROX) section (40) for further reducing the concentration of CO to a level acceptable for operating the CSA (56). The FPS (110) is improved by the WGS section (12, 120) including a reactor (124) with a high activity catalyst for reducing the reformate CO concentration to a relatively low level, thereby relatively reducing the structural volume of the FPS (110). The high activity catalyst is active at temperatures as low as 2500 C, and may be a noble-metal-on-ceria catalyst of Pt and Re on a nanocrystaline, cerium oxide-based support. Use of the catalyst in the WGS reactor (124) reduces the concentration of CO in the reformate to 2,000 ppmv, or less, and requires only a low temperature PROX reactor (46) for preferential oxidation in the FPS (110).

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Номер записи: 7
23-11-2017 дата публикации

Process for producing liquid hydrogen

Номер: ES2643558A2
Автор: Nikunj Gupta, Thomas Alexander Pasfield
Принадлежит: Shell Internationale Research Maatschappij BV

The invention relates to an integrated process for continuous production of liquid hydrogen, comprising (a) producing gaseous hydrogen by electrolysis; and (b) liquefying said gaseous hydrogen in a hydrogen liquefaction unit, which liquefaction unit is powered by energy essentially from renewable sources; and, (c) when additional power is needed, using electrical energy generated in a process in which electrical energy and hydrogen are co-generated by an integrated electrolysis process comprising: (d) electrolysing a metal salt or mixture of metal salts and water into the corresponding metal or metals, acid or acids, and oxygen (electricity storage phase), and (e) producing gaseous hydrogen and recovering electricity in a regeneration reaction of the metal (s) and acid(s) of step (d) (regeneration phase); wherein at least part of the gaseous hydrogen generated in step (e) is used in step (b) of the process.

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Номер записи: 8
13-11-2012 дата публикации

Fuel cell flow field having strong, chemically stable metal bipolar plates

Номер: US8309264B2
Автор: Jean Colpin, Nikunj Gupta, Patrick L. Hagans, Sergei F. Burlatsky, Shubhro Ghosh, Weilong Zhang
Принадлежит: UTC Fuel Cells LLC

A bipolar plate ( 30 ) for use in a fuel cell stack ( 10 ) includes one or more first metal layers ( 40 a ) having a tendency to grow an electrically passive layer in the presence of a fuel cell reactant gas and one or more second metal layers ( 40 b ) directly adjacent the one or more first metal layers ( 40 a ). The second metal layer has a tendency to resist growing any oxide layer in the presence of the fuel cell reactant gas to maintain a threshold electrical conductivity. The second metal layer also has a section for contacting an electrode ( 12, 14 ) and providing an electrically conductive path between the electrode ( 12, 14 ) and the first metal layer.

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Номер записи: 9
07-01-2016 дата публикации

Process for producing hydrogen and generating power

Номер: AU2013326478B2
Автор: Karel Martin Kapoun, Nikunj Gupta, Salvador ALDRETT LEE
Принадлежит: Shell Internationale Research Maatschappij BV

The invention relates to a process for producing hydrogen and generating power comprising the following steps: (a) subjecting a gaseous hydrocarbon feedstock to an endothermic steam reforming reaction by contacting the hydrocarbon feedstock, in a steam reforming reaction zone, in the presence of steam, with a steam reforming catalyst under steam reforming conditions to obtain a gaseous mixture comprising hydrogen and carbon monoxide; (b) recovering hydrogen from the mixture; (c) feeding a fuel and an oxidant to a turbine comprising in series a compressor, a combustion chamber and an expansion turbine, wherein the compressor is drivingly coupled to the expansion turbine, wherein the oxidant is compressed in the in the compressor to obtain compressed oxidant and the fuel is combusted with the compressed oxidant in the combustion chamber to obtain a stream of combusted gas; (d) feeding at least part of the stream of combusted gas to the expansion turbine to generate power and to obtain a turbine flue gas; and (e) providing heat for the endothermic reforming reaction by bringing a hot gas stream generated in step (c) and/or step (d) in heat exchange contact with the steam reforming reaction zone; and (f) liquefaction of the hydrogen recovered in step (b) by subjecting the hydrogen recovered to a liquefaction cycle comprising cooling and compressing the hydrogen.

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Номер записи: 10