Abstract: Provided is a technology of searching for operation guidance for efficiently operating a liquefied natural gas plant An operation guidance searching method for a liquefied natural gas plant includes: acquiring data sets of operation data of process variables for a plurality of target devices and disturbance data; generating, through machine learning, a plant model indicating correspondences of output values of process variables with respect to manipulated variables and input values of disturbances; and searching, through reinforcement learning, for input values of the manipulated variables operation variables for with which a compression power per unit production amount is minimized under a condition in which an outlet temperature of a liquefied natural gas is a preset restriction temperature or lower.

Abstract: Included are: a raw material component storage unit that stores the raw material component supplied to the ammonia synthesis unit; a high-pressure raw material component storage unit that stores the raw material component at a pressure higher than a pressure at which the raw material component is stored in the raw material component storage unit; and a surplus electric power processing unit including a high-pressure raw material component transfer unit that boosts and transfers the raw material component from the raw material component storage unit to the high-pressure raw material component storage unit, and an expander that converts pressure energy of the raw material component supplied from the high-pressure raw material component storage unit into motive power to generate power.

Abstract: An air-cooled heat exchanger (6) arranged in a gas processing facility for performing a liquefaction process of natural gas is configured to supply cooling air to a tube (63) through which a fluid to be cooled is caused to flow, to thereby cool the fluid to be cooled, and a mist supply section (7) is configured to supply mist obtained by spraying demineralized water, to thereby cool the cooling air. Further, the mist supply section (7) is configured to spray the demineralized water from a lateral position on an upstream side of an intake.

Abstract: Provided is a production facility for liquefied hydrogen and a liquefied natural gas from a natural gas, including: a first heat exchanger configured to cool a hydrogen gas through heat exchange between the hydrogen gas and a mixed refrigerant for liquefying a natural gas containing a plurality of kinds of refrigerants selected from the group consisting of methane, ethane, propane, and nitrogen; a second heat exchanger configured to cool the mixed refrigerant through heat exchange between the mixed refrigerant and propane; and a third heat exchanger configured to cool the hydrogen gas through heat exchange between the hydrogen gas and a refrigerant containing hydrogen or helium, wherein the first heat exchanger has a precooling temperature of from ?100° C. to ?160° C.

Abstract: The module for a natural gas liquefaction apparatus includes: a frame configured to accommodate a device group forming a part of the natural gas liquefaction apparatus; an annex building, which is provided separately from the frame, and is configured to accommodate at least one of a power supply apparatus or a control information output device; and a coupling member, which is configured to couple the frame and the annex building to each other so as to enable the frame and the annex building to be transported as one unit at a time of transportation of the module for a natural gas liquefaction apparatus, and is removed so as to separate the frame and the annex building from each other at a time of installation of the module for a natural gas liquefaction apparatus in a construction site of the natural gas liquefaction apparatus.

Abstract: Provided are a power control device and control method employed therein. The power control device is provided with: a storage battery connected between the solar cell and the power conditioner; a converter, which is disposed between the storage battery and the solar cell, and which charges the storage battery with output power of the solar cell; and a control unit which controls the converter such that the converter charges the storage battery with differential power between the output power of the solar cell and the output power of the power conditioner in the cases where it is determined that the output of the solar cell will be larger than the outputtable power of the power conditioner.

Abstract: Provided are a non-hydrocarbon gas separation device and the like capable of increasing a discharge pressure of a non-hydrocarbon gas to a downstream side while preventing an increase in size of equipment. In the non-hydrocarbon gas separation device, a first separation module (2a) and a second separation module (2b) connected to each other in series are each configured to separate a non-hydrocarbon from a natural gas through use of a separation membrane (20). The non-hydrocarbon gas having been separated from the natural gas is discharged to each of discharge lines (202) and (204). At this time, a pressure of the first separation module (2a) on a discharge line (202) side is higher than a pressure of the second separation module (2b) on a discharge line (204) or (202) side.

Abstract: Provided is a non-hydrocarbon gas separation device or the like capable of separating a non-hydrocarbon gas from a natural gas containing a heavy hydrocarbon. The non-hydrocarbon gas separation device is configured to separate a non-hydrocarbon gas from a natural gas. The natural gas containing a heavy hydrocarbon, the heavy hydrocarbon having 5 or more carbon atoms, is supplied to a separation module (2). The natural gas having been separated from the non-hydrocarbon gas is allowed to outflow from the separation module (2), and the non-hydrocarbon gas having been separated from the natural gas is discharged from the separation module (2). An inorganic membrane (20), which is housed in the separation module (2), and is made of an inorganic material is configured to allow the non-hydrocarbon gas contained in the natural gas to permeate therethrough to a discharge side, and to allow the natural gas having been separated from the non-hydrocarbon gas to flow to an outflow side.

Abstract: Provided are a liquefaction pretreatment facility for a hydrocarbon gas and the like in which, an influence of contained hydrogen sulfide and oxygen on liquefaction pretreatment can be reduced. In a liquefaction pretreatment facility for a hydrocarbon gas, adsorption vessels are each connected to a treatment gas line configured to supply a hydrocarbon gas containing water, hydrogen sulfide, and oxygen and are each packed with synthetic zeolite for adsorbing and removing water in the hydrocarbon gas. A regeneration gas line is configured to supply a heated regeneration gas to the adsorption vessels to regenerate the synthetic zeolite having adsorbed water through heating. A temperature control system is configured to control a heating temperature of the regeneration gas so that a temperature in the adsorption vessel during regeneration of the synthetic zeolite is less than 230° C., which is a set temperature.

Abstract: A method of efficiently producing saccharides having glucose as the major component by inexpensively suppressing the non-productive adsorption of the enzyme to lignin is provided. The method of producing saccharides includes: a first step of preparing a water-soluble protein by adding at least any one of an animal protein and a vegetable protein to an aqueous sodium hydroxide solution or an aqueous calcium hydroxide solution to react with each other; a second step of adding the water-soluble protein to a slurry including a biomass; and a third step of producing saccharides having glucose as a major component by adding a degrading enzyme to the slurry for at least any one of a cellulose or a hemicellulose included in the biomass to be degraded by the degrading enzyme simultaneously with addition of the water-soluble protein to the slurry or after addition of the water-soluble protein.

Abstract: A high-concentration ammonia production method includes: synthesizing ammonia through electrolysis using water and nitrogen as raw materials; subjecting a resultant generation gas to treatment using an ammonia separation membrane or an ammonia PSA to separate the generation gas into high-concentration ammonia and a residual gas; recycling the residual gas as a nitrogen gas raw material of an ammonia synthesis reactor, and liquefying the high-concentration ammonia recovered through the ammonia separation membrane or the ammonia PSA; and subjecting an unliquefied gas separated from liquefied ammonia to the treatment using the ammonia separation membrane or the ammonia PSA again. According to the present disclosure, ammonia is synthesized by adopting an electrolysis method in which the synthesized ammonia substantially does not contain hydrogen, in combination with ammonia separation and recovery treatment using membrane separation or PSA.

Abstract: A module for a natural gas liquefaction apparatus is provided to include air-cooled heat exchanger groups and another equipment group. The air-cooled heat exchanger groups another equipment group. The air-cooled heat exchanger groups are arranged side by side on an upper surface of a structure, and are each configured to cool a fluid handled in the natural gas liquefaction apparatus. The another equipment group is arranged on a lower side from an arrangement height of each air-cooled heat exchanger groups, and forms a part of the natural gas liquefaction apparatus.

Abstract: In a gas liquefaction plant that produces a liquefied gas by liquefying a raw gas, a pipe rack portion in which an air-cooling heat exchanging system is disposed has a rectangular shape when viewed from above. A first compressor, a precooling heat exchanging portion, an auxiliary heat exchanging portion, and a fourth compressor are arranged in this order along one long side of the pipe rack portion. A second compressor, a primary heat exchanging portion, and a third compressor are arranged in this order along the other long side of the pipe rack portion. A pipe that carries the raw gas cooled at the precooling heat exchanging portion is connected to the primary heat exchanging portion across the pipe rack portion. A pipe that carries a primary refrigerant compressed at the second and third compressors is connected to the auxiliary heat exchanging portion across the pipe rack portion.

Abstract: An electric power converter includes a first capacitor being located between an input terminal and an output terminal, and that connects a first terminal being located between the input terminal and a ground, a reactor that connects through electric contact between the first terminal and the output terminal, a switching element that connects through electric contact between the input terminal and the output terminal, and a control unit that executes a first PWM control process controlling a pulse width of the PWM waveform by on and off of the switching device according to the fluctuation of the output voltage, and that executes a second PWM control process widening a pulse width of the PWM and a duty cycle of a PWM than those of the previous cycle when a pulse width becomes a lower limit.

Abstract: For estimation of the gas emission amount from a storage tank for storing a liquid containing the volatile compounds therein, preconditions involving a tank shape of the fixed roof type storage tank and a working pressure of a relief valve are set in a first step, and initial conditions for storage volumes, temperatures, and pressures of the liquid and a gas inside the storage tank are set in a second step. In a third step, an inflow or outflow heat quantity to or from the liquid and the gas inside the storage tank is determined so that a mass transfer amount between the liquid and the gas is obtained through CFD analysis. In a fourth step, whether or not the relief valve is actuated and the gas emission amount through the relief valve are obtained based on the mass transfer amount.

Abstract: A method for producing ethanol, which is a method for producing ethanol from a saccharide obtained from biomass, includes a step of adding an additive solution containing at least acetic acid, formic acid, furfural, and hydroxymethylfurfural to the saccharide to prepare a mixed solution containing the saccharide and the additive solution, and a step of adding a microorganism to the mixed solution to ferment the saccharide using the microorganism, thereby producing ethanol.

Abstract: Provided is a gas processing facility capable of enhancing the performance of an air-cooled heat exchanger while suppressing the influence on apparatus from spraying of demineralized water to the air-cooled heat exchanger to be used in a processing of natural gas. An air-cooled heat exchanger arranged in the gas processing facility for performing a liquefaction process of natural gas and the like is configured to supply cooling air to a tube through which a fluid to be cooled is caused to flow, to thereby cool the fluid to be cooled, and a mist supply section is configured to supply mist obtained by spraying demineralized water, to thereby cool the cooling air. Further, the mist supply section is configured to spray the demineralized water from a lateral position on an upstream side of an intake.

Abstract: A high-concentration ammonia production method includes: synthesizing ammonia through electrolysis using water and nitrogen as raw materials; subjecting a resultant generation gas to treatment using an ammonia separation membrane or an ammonia PSA to separate the generation gas into high-concentration ammonia and a residual gas; recycling the residual gas as a nitrogen gas raw material of an ammonia synthesis reactor, and liquefying the high-concentration ammonia recovered through the ammonia separation membrane or the ammonia PSA; and subjecting an unliquefied gas separated from liquefied ammonia to the treatment using the ammonia separation membrane or the ammonia PSA again. According to the present disclosure, ammonia is synthesized by adopting an electrolysis method in which the synthesized ammonia substantially does not contain hydrogen, in combination with ammonia separation and recovery treatment using membrane separation or PSA.

Abstract: Provided is a production facility for liquefied hydrogen and a liquefied natural gas from a natural gas, including: a first heat exchanger configured to cool a hydrogen gas through heat exchange between the hydrogen gas and a mixed refrigerant for liquefying a natural gas containing a plurality of kinds of refrigerants selected from the group consisting of methane, ethane, propane, and nitrogen; a second heat exchanger configured to cool the mixed refrigerant through heat exchange between the mixed refrigerant and propane; and a third heat exchanger configured to cool the hydrogen gas through heat exchange between the hydrogen gas and a refrigerant containing hydrogen or helium, wherein the first heat exchanger has a precooling temperature of from ?100° C. to ?160° C.

Abstract: A liquefied gas production facility includes a plurality of liquefied gas producers which produce liquefied gas by removing an unnecessary substance and liquefying feed gas containing methane as a main component.