New integrated scheme of the closed gas-turbine cycle with synthesis gas production

Granovskii, M. S.; Safonov, M. S.

doi:10.1016/s0009-2509(03)00289-6

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…Introducing the adiabatic catalytic methane reformer downstream of the combustor and turbine of NG-oxygen-fired GTU cycle results in a mass balance similar to that shown in eq . The drawback of conducting methane reforming downstream of the turbine is its slow reaction rate compared to methane partial oxidation proceeding at much higher temperatures and involving active short-living radicals.…”

Section: Integrated Gtu For Power and Syngas Cogenerationmentioning

confidence: 99%

Integrated Coproduction of Power and Syngas from Natural Gas to Abate Greenhouse Gas Emissions without Economic Penalties

Granovskiy

2021

ACS Omega

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Natural gas (NG)-fired power plants are significant greenhouse gas (GHG) emitters because of their substantial CO 2 release. To avoid these emissions, precombustion and postcombustion CO 2 capture alongside oxy-fuel combustion were considered in the literature. However, because of additional energy requirements, these options generally induce an approximately 7–10% decrease in net heat-to-power efficiencies regarding regular NG-air-fired stations without CO 2 capture. To compensate for this declination, in this study, a simultaneous generation of power and syngas (CO and H 2 ) was proposed in an integrated NG-oxygen-fired gas turbine unit (GTU). Hence, the combustion chamber in the NG-oxygen-fired gas turbine cycle was replaced by an NG partial oxidation reactor, which converts it into syngas. The syngas was separated from the working fluid of the cycle by the condensation of water vapor (steam), and a part of it was withdrawn from the GTU to be utilized as a chemical feedstock. A benchmark thermodynamic analysis at the same input–output conditions and requirements for carbon capture was conducted to compare the proposed unit with NG-air and NG-oxygen-fired power plants. The integration effect was shown by increasing the heat-to-power efficiency from 48 to 54%. With carbon monoxide (CO) as an intermediate, the author proposed capturing carbon in NG (methane) in liquid formic acid, which is a good commodity for transportation to a place where it can be reconverted into CO or H 2 to manufacture various industrial chemicals. Simple economic considerations show that because of a substantially higher cost of formic acid than an equivalent power, CO conversion into formic acid substantiates the integrated approach as economically attractive.

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Section: Integrated Gtu For Power and Syngas Cogenerationmentioning

confidence: 99%

Integrated Coproduction of Power and Syngas from Natural Gas to Abate Greenhouse Gas Emissions without Economic Penalties

Granovskiy

2021

ACS Omega

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“…An increase in the number of trippings of single-shaft CCGT units by surge protection of GT have been observed in many countries in the last ten years [1]. Many of these trippings were accompanied with a frequency drop in the HV grid, to which these units were connected, although the frequency values were within the permissible limits for the GT and ST (about 49 Hz).…”

Section: Introductionmentioning

confidence: 99%

The behavior of single-shaft combined cycle gas turbine units at frequency drop in the connected grid

Silbermann¹

2018

Int. J. EQ

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In the last 15 years many companies have developed single-shaft combined cycle gas turbine (CCGT) units having one generator, which is coupled to common single shaft of gas turbine (GT) and steam turbine (ST) via a special elaborated synchro-self-shifting (SSS) clutch. This clutch connects automatically the drive of the ST at one end of the generator to complement the drive of the GT at the other end of the generator. Such a technical solution, in comparison to previous ones, allows economizing on one generator circuit breaker (GCB) as well as the use of a two-winding transformer instead of a three-winding transformer. This scheme of single-shaft CCGT units is taking place in many countries, but cases of tripping of such units by surge protection of GT have been observed in any power plants (PP). All such trippings were accompanied by frequency drop in the high voltage (HV) grid, to which these units were connected, although these drops were within the permissible limits for the CCGT units. This paper reports the results of investigating one of these cases of tripping, discusses the possible cause of these incidents and elaborates on some measures to prevent such trippings in the future.

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Application of oxygen ion-conductive membranes for simultaneous electricity and hydrogen generation

Granovskii¹,

Dinçer²,

Rosen³

2006

Chemical Engineering Journal

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New integrated scheme of the closed gas-turbine cycle with synthesis gas production

Cited by 8 publications

References 4 publications

Integrated Coproduction of Power and Syngas from Natural Gas to Abate Greenhouse Gas Emissions without Economic Penalties

Integrated Coproduction of Power and Syngas from Natural Gas to Abate Greenhouse Gas Emissions without Economic Penalties

The behavior of single-shaft combined cycle gas turbine units at frequency drop in the connected grid

Application of oxygen ion-conductive membranes for simultaneous electricity and hydrogen generation

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