The gas and steam turbines and combined cycle in IGCC systems

Wang, Ting

doi:10.1016/b978-0-08-100167-7.00028-7

Cited by 17 publications

(12 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The AFT of Barapukurian coal was measured to be higher than 1560°C under reducing atmosphere, as shown in Table 2. The AFT depends on the concentration of mineral matter present in the ash [21]. The higher AFT of Barapukurian coal is potentially due to the higher concentration of Al2O3 with a very high melting temperature [22].…”

Section: Sample Characterisationmentioning

confidence: 99%

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Shahabuddin

Kibria

Bhattacharya

2021

Journal of the Energy Institute

View full text Add to dashboard Cite

Section: Sample Characterisationmentioning

confidence: 99%

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Shahabuddin

Kibria

Bhattacharya

2021

Journal of the Energy Institute

View full text Add to dashboard Cite

“…This is due to the fact that H 2 O exhibits a stronger decarbonization ability than CO 2 , both thermodynamically and kinetically. 47 The CO 2 hydrogenation and H 2 O decarbonization processes are similar to those of CO 2 decarbonization without any additional H 2 consumption, as shown in Figure 3f. Coke, as the byproduct of C 3 H 8 dehydrogenation, participates in the decarbonization reaction to produce CO, which is also equivalent to the reforming reaction of CO 2 and C 3 H 8 , where coke serves as a bridge between CO 2 and C 3 H 8 .…”

Section: Resultsmentioning

confidence: 58%

Synergistic Effect of Zinc and Iron in the CO₂-Assisted Oxidative Dehydrogenation of Propane

Zhang,

Li,

Liu

et al. 2023

ACS Catal.

View full text Add to dashboard Cite

The CO2-assisted oxidative dehydrogenation (CO2-ODH) of C3H8 provides a promising process for producing C3H6 and utilizing CO2. In this study, the combination of zinc and iron demonstrated a synergistic effect, leading to improved catalytic activity and stability. The importance of the reducibility of ZnFe2O x /S-1 has been highlighted through auxiliary experiments and comprehensive characterizations. The presence of sodium additives is found to hinder the reduction of ZnFe2O x /S-1 by inducing strong interactions. Furthermore, during the initial stage of the reaction, the reduction process initiates the catalytic activity and promotes CO2 conversion through decarbonization reactions. The precursor of ZnFe2O4 and the strong interaction between Zn and Fe species, along with the formation process of α-Fe from inside to outside, effectively prevent the occurrence of the reforming reaction and suppress the coking deactivation of ZnFe2O x /S-1. This study provides fundamental insights into Zn- and Fe-based catalysts in the CO2-assisted oxidative dehydrogenation reaction.

show abstract

“…Minimum quality of working fluid (x T,min ) during expansion is verified dividing the turbine in ten small-stages and calculating the quality in each small-stage. The small-stages have constant polytropic efficiency (η T, poly ) and pressure ratio (pr T,ss ) as presented in Equation ( 5) [46]. Turbine reheat factor (RH T ) measures the inefficiency of the complete expansion [46] and it is calculated using Equation ( 6) in which ∆h ss,ise is the isentropic small-stage enthalpy difference.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

“…The small-stages have constant polytropic efficiency (η T, poly ) and pressure ratio (pr T,ss ) as presented in Equation ( 5) [46]. Turbine reheat factor (RH T ) measures the inefficiency of the complete expansion [46] and it is calculated using Equation ( 6) in which ∆h ss,ise is the isentropic small-stage enthalpy difference.…”

Section: Thermodynamic Modelmentioning

confidence: 99%

Surrogate Models Applied to Optimized Organic Rankine Cycles

et al. 2021

View full text Add to dashboard Cite

Global optimization of industrial plant configurations using organic Rankine cycles (ORC) to recover heat is becoming attractive nowadays. This kind of optimization requires structural and parametric decisions to be made; the number of variables is usually high, and some of them generate disruptive responses. Surrogate models can be developed to replace the main components of the complex models reducing the computational requirements. This paper aims to create, evaluate, and compare surrogates built to replace a complex thermodynamic-economic code used to indicate the specific cost (US$/kWe) and efficiency of optimized ORCs. The ORCs are optimized under different heat sources conditions in respect to their operational state, configuration, working fluid and thermal fluid, aiming at a minimal specific cost. The costs of 1449.05, 1045.24, and 638.80 US$/kWe and energy efficiencies of 11.1%, 10.9%, and 10.4% were found for 100, 1000, and 50,000 kWt of heat transfer rate at average temperature of 345 °C. The R-square varied from 0.96 to 0.99 while the number of results with error lower than 5% varied from 88% to 75% depending on the surrogate model (random forest or polynomial regression) and output (specific cost or efficiency). The computational time was reduced in more than 99.9% for all surrogates indicated.

show abstract

The gas and steam turbines and combined cycle in IGCC systems

Cited by 17 publications

References 71 publications

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Synergistic Effect of Zinc and Iron in the CO₂-Assisted Oxidative Dehydrogenation of Propane

Surrogate Models Applied to Optimized Organic Rankine Cycles

Contact Info

Product

Resources

About

The gas and steam turbines and combined cycle in IGCC systems

Cited by 17 publications

References 71 publications

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Evaluation of high-temperature pyrolysis and CO2 gasification performance of bituminous coal in an entrained flow gasifier

Synergistic Effect of Zinc and Iron in the CO2-Assisted Oxidative Dehydrogenation of Propane

Surrogate Models Applied to Optimized Organic Rankine Cycles

Contact Info

Product

Resources

About

Synergistic Effect of Zinc and Iron in the CO₂-Assisted Oxidative Dehydrogenation of Propane