Chiyoda Corporation

Air Products and Chemicals, Inc.

Yoshitsugi Kikkawa

Osamu Yamamoto

Koichiro Sakai

Moritaka Nakamura

Junichi Sakaguchi

Noriyoshi Nozawa

Hiroshi Inoue

Shigeru Sugiyama

Takashi Okano

Hirohiko Kikuchi

Toshiya Momose

Satoshi Yasuda

Masanori Kameta

Etsuro Sato

Yasuharu Fukuda

Kenrou Ohmori

Motohiro Ohmori

Yasuhiro Naito

Yu Nan Liu

Timothy Truong

Shinji Kaneta

Junichiro Tanaka

Takeshi Hino

Masaaki Oishi

There is provided a transportation system that can efficiently transport renewable energy from power generation facilities in remote locations to hydrogen energy consumption areas with low environmental impact. The system includes a power generator that generates and stores electricity using renewable energy, a water electrolyzer that generates hydrogen by electrolyzing water using the electricity generated by the power generator, a methane synthesizer that generates methane using the hydrogen generated and recycled COas raw materials through the Sabatier reaction, a methane transportation means that transports the generated methane to the hydrogen energy consumption site without emitting COinto the atmosphere, a hydrogen production and carbon capture unit that produces hydrogen by autothermal reforming method using the transported methane and separately prepared oxygen as raw materials, and a COtransportation means that transports the recycled COwithout emitting COinto the atmosphere to the site where the methane synthesizer is installed.

Green energy transportation system and transportation method using green hydrogen

To provide a transportation system that can transport renewable energy from a power generation facility to an energy consumption location. The system consists of a power generator that generates and stores electricity from a renewable energy, a hydrogen generator that generates hydrogen by electrolysis of water using electricity obtained from the power generator, a methane synthesizer that generates methane by the Sabatier reaction using the hydrogen and a recycled COas raw materials, and a methane transportation system that transports the methane without emitting COto the atmosphere, a methane transportation system that transports the methane without emitting COinto the atmosphere, a power generation and carbon capture unit that generates electricity by reacting the transported methane with oxygen and captures COdischarged during the power generation as recycled CO, a COtransportation system that transports the recycled COto the methane synthesis site without emitting COto the atmosphere.

Green energy transportation system and energy transportation method

An inlet air cooling system used in a gas turbine for supplying power to a refrigerant compressor for compressing refrigerant in a natural gas liquefaction plant includes: an inlet air cooler for cooling inlet air of the gas turbine; chiller motors used for a chiller for cooling coolant supplied to the inlet air cooler; a first variable speed driver for supplying electric power to each of the one or more chiller motors; and an electric generator driven by the gas turbine, wherein the electric generator is electrically connected to the first variable speed driver, and electric power generated by the electric generator can be supplied to each of the chiller motors from the first variable speed driver without using a main power line of an electric power system, which enables efficient electric power supply to the motors via the variable speed driver.

Inlet air cooling system and inlet air cooling method for gas turbine

All sulfur compounds can be efficiently removed from natural gas that contains hydrogen sulfide and other sulfur compounds such as mercaptan without using physical absorption. The process comprises an absorption step of treating natural gas by means of a chemical absorption method using an amine-containing solution to mainly remove hydrogen sulfide and carbon dioxide, an adsorption step of flowing the natural gas from the absorption step through a packed bed of a molecular sieve to mainly remove mercaptan, a recovery step of recovering sulfur compounds by converting the hydrogen sulfide removed in the absorption step into sulfur by means of the Claus process, a regeneration step of desorbing the mercaptan adsorbed on the molecular sieve in the adsorption step using heated gas and a reaction step of converting the mercaptan in the regeneration exhaust gas exhausted from the regeneration step into hydrogen sulfide. The reaction step is conducted by injecting steam or water at a ratio of HO/S=1 to 5 (molar ratio) relative to the sulfur in the regeneration exhaust gas in the presence of a catalyst under the conditions of a temperature level of 250 to 400&#xb0; C. and a pressure level of 1 to 10 MPa.

Method of removing sulfur compounds from natural gas

Provided is a method for liquefying natural gas which can be applied to LNG plants of a wide range of capacity and can produce LNG both efficiently and economically. Feed gas of natural gas or a non-liquefied component of recycle gas which is produced during a process of liquefying natural gas is liquefied by using a first refrigerant, for instant consisting of a C3 refrigerant, and a second refrigerant which is different from the first refrigerant, for instance consisting of a C2 refrigerant, in a stepwise fashion. The flow is then liquefied by a substantially isentropic expansion process. The non-liquefied component remaining from this expansion process is then pressurized by a compressor, and combined with the non-liquefied component of the natural gas for recycling the combined flow. The compressor is driven by power obtained from the substantially isentropic expansion process.

Method for liquefying natural gas

In a compressor drive system for a natural gas liquefaction plant including a plurality of gas turbines each provided in an individual refrigeration cycle for pressurizing a different refrigerant, an electric motor is provided for each of the gas turbines so as to serve both as an auxiliary electric motor for generating a startup torque and as an AC generator, and the excess output power of the gas turbine is converted into electric power by this electric motor when the power requirement of the associated compressor is less than the power output of the gas turbine. Additionally, at least two of the gas turbines are of an identical make which is suitable for driving the compressor of one of the associated refrigeration cycles requiring a larger driving power. Therefore, the gas turbines can be operated at optimum conditions at all times without regard to seasonal changes of the operating conditions, and the efficient operation of the gas turbines will result in a significant reduction in the operation costs through a substantial saving of fuel consumption. Moreover, any excess power output of one of the gas turbines can be allocated so as to reduce the burden of the in-plant power station and/or to supplement the shortage of the power output of the other gas turbine, and the management of the stand-by units and spare parts can be simplified. These factors have a compounded effect in reducing the investment costs of the plant.

Compressor drive system for a natural gas liquefaction plant having an

Provided is an improved refrigeration system for pre-cooling natural gas or cooling a mixed refrigerant for natural gas liquefaction in a propane refrigeration process widely used for the liquefaction of natural gas. The system comprises a plurality of plate-fin heat exchangers preferably arranged in a parallel relationship for passing a propane refrigerant as a vertical flow and pre-cooling natural gas or cooling a mixed refrigerant for liquefying natural gas, and a thermo siphon drum for the propane refrigerant consisting of a horizontally disposed, laterally elongated tank. Because the passages of the heat exchanger for the natural gas or the mixed refrigerant extend over their entire length in mutually separate relationship, even when the propane refrigerant, the natural gas or the mixed refrigerant is in both gas and liquid phases, a high efficiency of heat transfer can be attained, and the size of the heat exchanger can be reduced. In particular, from an economic view point, it is preferable if the thermo siphon drum serves also as a flash tank.

Refrigeration system for a natural gas liquefaction process

Provided is a method for liquefying natural gas which can be readily adapted to LNG plants of all sizes without requiring expensive and special heat exchangers. The liquefaction of feed gas of natural gas and recycle natural gas is carried out with a single-component refrigerant or a mixed refrigerant in a high temperature stage, and with a substantially isentropic expansion in a low temperature stage, and a non-liquefied part of the recycle gas after the expansion step is pressurized with a compressor and recycled along with a recycle stream of non-liquefied par of the feed natural gas, the liquefied part by the refrigerant exchanging heat with the non-liquefied part stream produced from the substantially isentropic expansion, in a plate-fin heat exchanger or the like. The compressor is driven by the power obtained by the substantially isentropic expansion.

Growing community of inventors

Yokohama, Japan

Yoshitsugi Kikkawa