Thermodynamic and economic assessment of cyano functionalized anion based ionic liquid for CO2 removal from natural gas integrated with, single mixed refrigerant liquefaction process for clean energy

A concept for capturing and sequestering CO2 from a natural gas fired combined cycle power plant is presented. The present approach is to decarbonise the fuel prior to combustion by reforming natural gas, producing a hydrogen-rich fuel. The reforming process consists of an air-blown pressurised auto-thermal reformer that produces a gas containing H2, CO and a small fraction of CH4 as combustible components. The gas is then led through a water gas shift reactor, where the equilibrium of CO and H2O is shifted towards CO2 and H2. The CO2 is then captured from the resulting gas by chemical absorption. The gas turbine of this system is then fed with a fuel gas containing approximately 50% H2. In order to achieve acceptable level of fuel-to-electricity conversion efficiency, this kind of process is attractive because of the possibility of process integration between the combined cycle and the reforming process. A comparison is made between a “standard” combined cycle and the current process with CO2-removal. This study also comprise an investigation of using a lower pressure level in the reforming section than in the gas turbine combustor and the impact of reduced steam/carbon ratio in the main reformer. The impact on gas turbine operation because of massive air bleed and the use of a hydrogen rich fuel is discussed.

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Towards Biohydrogen Separation Using Poly(Ionic Liquid)/Ionic Liquid Composite Membranes

Membranes ◽

10.3390/membranes8040124 ◽

2018 ◽

Vol 8 (4) ◽

pp. 124 ◽

Cited By ~ 8

Author(s):

Andreia S.L. Gouveia ◽

Lucas Ventaja ◽

Liliana C. Tomé ◽

Isabel M. Marrucho

Keyword(s):

Ionic Liquid ◽

High Performance ◽

Cost Effective ◽

Clean Energy ◽

Composite Membranes ◽

Feed Pressure ◽

Starting Point ◽

Poly Ionic Liquid ◽

Separation Performances ◽

H2 Selectivity

Considering the high potential of hydrogen (H2) as a clean energy carrier, the implementation of high performance and cost-effective biohydrogen (bioH2) purification techniques is of vital importance, particularly in fuel cell applications. As membrane technology is a potentially energy-saving solution to obtain high-quality biohydrogen, the most promising poly(ionic liquid) (PIL)–ionic liquid (IL) composite membranes that had previously been studied by our group for CO2/N2 separation, containing pyrrolidinium-based PILs with fluorinated or cyano-functionalized anions, were chosen as the starting point to explore the potential of PIL–IL membranes for CO2/H2 separation. The CO2 and H2 permeation properties at the typical conditions of biohydrogen production (T = 308 K and 100 kPa of feed pressure) were measured and discussed. PIL–IL composites prepared with the [C(CN)3]− anion showed higher CO2/H2 selectivity than those containing the [NTf2]− anion. All the membranes revealed CO2/H2 separation performances above the upper bound for this specific separation, highlighting the composite incorporating 60 wt% of [C2mim][C(CN)3] IL.

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Methane–oxygen electrochemical coupling in an ionic liquid: a robust sensor for simultaneous quantification

The Analyst ◽

10.1039/c4an00839a ◽

2014 ◽

Vol 139 (20) ◽

pp. 5140-5147 ◽

Cited By ~ 27

Author(s):

Zhe Wang ◽

Min Guo ◽

Gary A. Baker ◽

Joseph R. Stetter ◽

Lu Lin ◽

...

Keyword(s):

Ionic Liquid ◽

Natural Gas ◽

High Power ◽

Rapid Response ◽

Current Sensor ◽

Gas Emission ◽

Simultaneous Quantification ◽

Sensor Devices ◽

Electrochemical Coupling ◽

Natural Gas Emission

Current sensor devices for the detection of methane or natural gas emission are either expensive and have high power requirements or fail to provide a rapid response.

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