scholarly journals The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unit

2011 ◽  
Vol 32 (3) ◽  
pp. 89-101 ◽  
Author(s):  
Tadeusz Chmielniak ◽  
Sebastian Lepszy ◽  
Daniel Czaja
Keyword(s):  
Carbon Dioxide ◽  
Heat Source ◽  
Gas Turbine ◽  
Power Unit ◽  
Carbon Dioxide Capture ◽  
Heat Fluxes ◽  
Flue Gases ◽  
Chemical Absorption ◽  
Desorption Process ◽  
Air Turbine

The use of air-bottoming cycle as a heat source for the carbon dioxide capture installation of a coal-fired power unitThe installations of CO2capture from flue gases using chemical absorption require a supply of large amounts of heat into the system. The most common heating medium is steam extracted from the cycle, which results in a decrease in the power unit efficiency. The use of heat needed for the desorption process from another source could be an option for this configuration. The paper presents an application of gas-air systems for the generation of extra amounts of energy and heat. Gas-air systems, referred to as the air bottoming cycle (ABC), are composed of a gas turbine powered by natural gas, air compressor and air turbine coupled to the system by means of a heat exchanger. Example configurations of gas-air systems are presented. The efficiency and power values, as well as heat fluxes of the systems under consideration are determined. For comparison purposes, the results of modelling a system consisting of a gas turbine and a regenerative exchanger are presented.

Hybrid – Slurry/Nanofluid systems as alternative to conventional chemical absorption for carbon dioxide capture: A review

2021 ◽  
Vol 110 ◽  
pp. 103415
Author(s):  
Hassan A. Salih ◽  
Jeewan Pokhrel ◽  
Donald Reinalda ◽  
Inas AlNashf ◽  
Maryam Khaleel ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Capture ◽  
Chemical Absorption

scholarly journals Method of coordinating air starter and auxiliary power unit joint operation

2020 ◽  
pp. 5-13
Author(s):  
Grigory Popov ◽  
◽  
Vasily Zubanov ◽  
Valeriy Matveev ◽  
Oleg Baturin ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Power Unit ◽  
Gas Turbine Engine ◽  
Working Process ◽  
Joint Operation ◽  
Turbine Engine ◽  
Auxiliary Power Unit ◽  
Auxiliary Power ◽  
Start Up ◽  
Air Turbine

The presented work provides a detailed description of the method developed by the authors for coordinating the working process of the main elements of the starting system for a modern gas turbine engine for a civil aviation aircraft: an auxiliary power unit (APU) and an air turbine – starter. This technique was developed in the course of solving the practical problem of selecting the existing APU and air turbine for a newly created engine. The need to develop this method is due to the lack of recommendations on the coordination of the elements of the starting system in the available literature. The method is based on combining the characteristics of the APU and the turbine, reduced to a single coordinate system. The intersection of the characteristic’s lines corresponding to the same conditions indicates the possibility of joint operation of the specified elements. The lack of intersection indicates the impossibility of joint functioning. The calculation also takes into account losses in the air supply lines to the turbine. The use of the developed method makes it possible to assess the possibility of joint operation of the APU and the air turbine in any operating mode. In addition to checking the possibility of functioning, as a result of the calculation, specific parameters of the working process at the operating point are determined, which are then used as initial data in calculating the elements of the starting system, for example, determining the parameters of the turbine, which in turn allow providing initial information for calculating the starting time or the possibility of functioning of the starting system GTE according to strength and other criteria. The algorithm for calculating the start-up time of the gas turbine engine was also developed by the authors and implemented in the form of an original computer program. Keywords: gas turbine engine start-up, GTE starting system, air turbine, methodology, joint work, auxiliary power unit, power, start-up time, characteristics matching, coordination, operational characteristics, computer program.

Carbon dioxide capture from flue gases using microalgae: Engineering aspects and biorefinery concept

2012 ◽  
Vol 16 (5) ◽  
pp. 3043-3053 ◽  
Author(s):  
J.C.M. Pires ◽  
M.C.M. Alvim-Ferraz ◽  
F.G. Martins ◽  
M. Simões
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Capture ◽  
Flue Gases

scholarly journals Thermodynamic and economic analysis of a gas turbine combined cycle plant with oxy-combustion

2013 ◽  
Vol 34 (4) ◽  
pp. 215-233 ◽  
Author(s):  
Janusz Kotowicz ◽  
Marcin Job
Keyword(s):  
Carbon Dioxide ◽  
Genetic Algorithm ◽  
Gas Turbine ◽  
Heat Recovery ◽  
Carbon Dioxide Capture ◽  
Combined Cycle ◽  
Operating Parameters ◽  
Economic Factors ◽  
Heat Recovery Steam Generator ◽  
Combined Cycle Plant

Abstract This paper presents a gas turbine combined cycle plant with oxy-combustion and carbon dioxide capture. A gas turbine part of the unit with the operating parameters is presented. The methodology and results of optimization by the means of a genetic algorithm for the steam parts in three variants of the plant are shown. The variants of the plant differ by the heat recovery steam generator (HRSG) construction: the singlepressure HRSG (1P), the double-pressure HRSG with reheating (2PR), and the triple-pressure HRSG with reheating (3PR). For obtained results in all variants an economic evaluation was performed. The break-even prices of electricity were determined and the sensitivity analysis to the most significant economic factors were performed.

New Reactive Extraction Based Reclaiming Technique for Amines Used in Carbon Dioxide Capture Process from Industrial Flue Gases

2016 ◽  
Vol 55 (17) ◽  
pp. 5006-5018 ◽  
Author(s):  
Phattara Akkarachalanont ◽  
Chintana Saiwan ◽  
Teeradet Supap ◽  
Raphael Idem ◽  
Paitoon Tontiwachwuthikul
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Capture ◽  
Flue Gases ◽  
Reactive Extraction ◽  
Capture Process

scholarly journals Techno-Economic and Carbon Footprint Analyses of a Coke Oven Gas Reuse Process for Methanol Production

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1042
Author(s):  
Jean-François Portha ◽  
Wilmar Uribe-Soto ◽  
Jean-Marc Commenge ◽  
Solène Valentin ◽  
Laurent Falk
Keyword(s):  
Carbon Dioxide ◽  
Carbon Footprint ◽  
Environmental Sustainability ◽  
Computer Aided Design ◽  
Carbon Dioxide Capture ◽  
Coke Oven ◽  
Production Costs ◽  
Flue Gases ◽  
Coke Oven Gas ◽  
Methanol Production

This paper focuses on the best way to produce methanol by Coke Oven Gas (COG) conversion and by carbon dioxide capture. The COG, produced in steelworks and coking plants, is an interesting source of hydrogen that can be used to hydrogenate carbon dioxide, recovered from flue gases, into methanol. The architecture of the reuse process is developed and the different process units are compared by considering a hierarchical decomposition. Two case studies are selected, process units are modelled, and flowsheets are simulated using computer-aided design software. A factorial techno-economic analysis is performed together with a preliminary carbon balance to evaluate the economic reliability and the environmental sustainability of the proposed solutions. The production costs of methanol are equal to 228 and 268 €/ton for process configurations involving, respectively, a combined methane reforming of COG and a direct COG separation to recover hydrogen. This cost is slightly higher than the current price of methanol on the market (about 204 €/ton for a process located in the USA in 2013). Besides, the second case study shows an interesting reduction of the carbon footprint with respect to reference scenarios. The carbon dioxide capture from flue gases together with COG utilization can lead to a competitive and sustainable methanol production process depending partly on a carbon tax.

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