Argon production from air distillation: Use of a heat pump in a ternary distillation with a side rectifier

Woodward, D.W.; Yee, Terrence Fu

doi:10.1016/0950-4214(94)85006-2

Cited by 9 publications

(5 citation statements)

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“…Furthermore, it is one of the fully developed technologies for producing hydrogen. The results and conditions in real life are identical to those in theory [72]. When a light hydrocarbon fuel (such as methane) reacts with steam, it produces hydrogen as the primary product and carbon monoxide and carbon dioxide as by-products.…”

Section: Steam Methane Reforming (Smr)supporting

confidence: 69%

“…When a light hydrocarbon fuel (such as methane) reacts with steam, it produces hydrogen as the primary product and carbon monoxide and carbon dioxide as by-products. Since WGS processes accompany SMR in most applications, some literature includes WGS as a step in SMR [72]. Two endothermic reactions occur during the reforming process.…”

Section: Steam Methane Reforming (Smr)mentioning

confidence: 99%

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State of the Art in Separation Science

2022

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Section: Steam Methane Reforming (Smr)supporting

confidence: 69%

Section: Steam Methane Reforming (Smr)mentioning

confidence: 99%

State of the Art in Separation Science

2022

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“…The focus will be on cryogenic distillation as a more proper choice for CARSOXY gas turbines since it is capable of separating a ternary mixture into its individual components. Air can be separated into nitrogen, oxygen, and argon, with the last two being components of CARSOXY, which can be obtained at once within the same cryogenic distillation unit [7][8][9][10].…”

Section: Air Separation Unit (Asu)mentioning

confidence: 99%

CO2-Argon-Steam Oxy-Fuel Production for (CARSOXY) Gas Turbines

et al. 2019

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Due to growing concerns about carbon emissions, Carbon Capture and Storage (CCS) techniques have become an interesting alternative to overcome this problem. CO2-Argon-Steam-Oxy (CARSOXY)-fuel gas turbines are an innovative example that integrates CCS with gas turbine powergen improvement. Replacing air-fuel combustion by CARSOXY combustion has been theoretically proven to increase gas turbine efficiency. Therefore, this paper provides a novel approach to continuously supply a gas turbine with a CARSOXY blend within required molar fractions. The approach involves H2 and N2 production, therefore having the potential of also producing ammonia. Thus, the concept allows CARSOXY cycles to be used to support production of ammonia whilst increasing power efficiency. An ASPEN PLUS model has been developed to demonstrate the approach. The model involves the integrations of an air separation unit (ASU), a steam methane reformer (SMR), water gas shift (WGS) reactors, pressure swing adsorption (PSA) units and heat exchanged gas turbines (HXGT) with a CCS unit. Sensitivity analyses were conducted on the ASU-SMR-WGS-PSA-CCS-HXGT model. The results provide a baseline to calibrate the model in order to produce the required CARSOXY molar fraction. A MATLAB code has also been developed to study CO2 compression effects on the CARSOXY gas turbine compressor. Thus, this paper provides a detailed flowsheet of the WGS-PSA-CCS-HXGT model. The paper provides the conditions in which the sensitivity analyses have been conducted to determine the best operable regime for CARSOXY production with other high valuable gases (i.e., hydrogen). Under these specifications, the sensitivity analyses on the (SMR) sub-model spots the H2O mass flow rates, which provides the maximum hydrogen level, the threshold which produces significant CO2 levels. Moreover, splitting the main CH4 supply to sub-supply a SMR reactor and a furnace reactor correlates to best practices for CARSOXY. The sensitivity analysis has also been performed on the (ASU) sub-model to characterise its response with respect to the variation of air flow rate, distillation/boiling rates, product/feed stage locations and the number of stages of the distillation columns. The sensitivity analyses have featured the response of the ASU-SMR-WGS-PSA-CCS-HXGT model. In return, the model has been qualified to be calibrated to produce CARSOXY within two operability modes, with hydrogen and nitrogen or with ammonia as by-products.

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“…This limits the amount of the argon overhead vapor which can be condensed. Generally this limits the recovery of argon, so the process shown in Figure 6 with the use of liquid oxygen to provide supplemental duty is more effective and efficient (Agrawal et al, 1994).…”

Section: A Case Study Of Argon Production From Airmentioning

confidence: 99%

Heat Pumps for Thermally Linked Distillation Columns: An Exercise for Argon Production from Air

Yee¹

1994

Ind. Eng. Chem. Res.

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Argon production from air distillation: Use of a heat pump in a ternary distillation with a side rectifier

Cited by 9 publications

References 1 publication

State of the Art in Separation Science

State of the Art in Separation Science

CO2-Argon-Steam Oxy-Fuel Production for (CARSOXY) Gas Turbines

Heat Pumps for Thermally Linked Distillation Columns: An Exercise for Argon Production from Air

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