scholarly journals A Coal-Fired Power Plant With Zero-Atmospheric Emissions

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Joel Martinez-Frias ◽  
Salvador M. Aceves ◽  
J. Ray Smith ◽  
Harry Brandt
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Electric Power ◽  
Coal Gasification ◽  
Air Separation ◽  
Electric Power Plant ◽  
Working Fluid ◽  
Atmospheric Emissions ◽  
Electricity Cost ◽  
The Cost

This paper presents the thermodynamic and cost analysis of a coal-based zero-atmospheric emissions electric power plant. The approach involves an oxygen-blown coal gasification unit. The resulting synthetic gas (syngas) is combusted with oxygen in a gas generator to produce the working fluid for the turbines. The combustion produces a gas mixture composed almost entirely of steam and carbon dioxide. These gases drive multiple turbines to produce electricity. The turbine discharge gases pass to a condenser where water is captured. A stream of carbon dioxide then results that can be used for enhanced oil recovery or for sequestration. The term zero emission steam technology is used to describe this technology. We present the analysis of a 400MW electric power plant. The power plant has a net thermal efficiency of 39%. This efficiency is based on the lower heating value of the coal, and includes the energy necessary for coal gasification, air separation, and for carbon dioxide separation and sequestration. This paper also presents an analysis of the cost of electricity and the cost of conditioning carbon dioxide for sequestration. Electricity cost is compared for three different gasification processes (Texaco, Shell, and Koppers-Totzek) and two types of coals (Illinois 6 and Wyodak). COE ranges from 5.95¢∕kWhto6.15¢∕kWh, indicating a 3.4% sensitivity to the gasification processes considered and the coal types used.

scholarly journals A Coal-Fired Power Plant With Zero Atmospheric Emissions

2003 ◽  
Author(s):  
Joel Martinez-Frias ◽  
Salvador M. Aceves ◽  
J. Ray Smith ◽  
Harry Brandt
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Electric Power ◽  
Coal Gasification ◽  
Air Separation ◽  
Working Fluid ◽  
Atmospheric Emissions ◽  
Cost Of Electricity ◽  
Electricity Cost ◽  
The Cost

This paper presents the thermodynamic analysis of a coal-based zero-atmospheric emissions electric power plant. The approach involves an oxygen-blown coal gasification unit. The resulting synthetic gas (syngas) is combusted with oxygen in a gas generator to produce the working fluid for the turbines. The combustion produces a gas mixture composed almost entirely of steam and carbon dioxide. These gases drive multiple turbines to produce electricity. The turbine discharge gases pass to a condenser where water is captured. A stream of carbon dioxide then results that can be used for enhanced oil recovery, or for sequestration. This analysis is based on a 400 MW electric power generating plant that uses turbines that are currently under development by a U.S. turbine manufacturer. The power plant has a net thermal efficiency of 42.6%. This efficiency is based on the lower heating value of the coal, and includes the energy necessary for coal gasification, air separation and for carbon dioxide separation and sequestration. The paper also presents an analysis of the cost of electricity (COE) and the cost of conditioning carbon dioxide for sequestration for the 400 MW power plant. Electricity cost is compared for three different gasification processes (Texaco, Shell, and Koppers-Totzek) and two types of coals (Illinois #6 and Wyodak). Cost of electricity ranges from 5.16 ¢/kWhr to 5.42 ¢/kWhr, indicating very little sensitivity to the gasification processes considered and the coal types used.

Thermodynamic Analysis of Zero-Atmospheric Emissions Power Plant

2002 ◽  
Author(s):  
Joel Martinez-Frias ◽  
Salvador M. Aceves ◽  
J. Ray Smith ◽  
Harry Brandt
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Electric Power ◽  
Thermodynamic Analysis ◽  
Thermal Efficiency ◽  
Operating Conditions ◽  
Air Separation ◽  
Working Fluid ◽  
Atmospheric Emissions ◽  
Gas Generator

This paper presents a thermodynamic analysis of a natural gas zero-atmospheric emissions power plant with a net electrical output of 400 MW. In this power plant, methane is combusted with oxygen in a gas generator to produce the working fluid for the turbines. The combustion produces a gas mixture composed of steam and carbon dioxide. These gases drive multiple turbines to produce electricity. The turbine discharge gases pass to a condenser where water is captured as liquid and gaseous carbon dioxide is pumped from the system. The carbon dioxide can be economically conditioned for enhanced recovery of oil, or coal-bed methane, or for sequestration in a subterranean formation. The analysis considers a complete power plant layout, including an air separation unit, compressors and intercoolers for oxygen and methane compression, a gas generator, three steam turbines, a reheater, a preheater, a condenser, and a carbon dioxide pumping system to pump the carbon dioxide to the pressure required for sequestration. The computer code is a powerful tool for estimating the efficiency of the plant, given different configurations and technologies. The efficiency of the power plant has been calculated over a wide range of conditions as a function of the two important power plant parameters of turbine inlet temperature and turbine isentropic efficiency. This simulation is based on a 400 MW electric power generating plant that uses turbines that are currently under development by a U.S. turbine manufacturer. The high-pressure turbine would operate at a temperature of 1089 K (1500 °F) with uncooled blades, the intermediate-pressure turbine would operate at 1478 K (2200 °F) with cooled blades and the low-pressure turbine would operate at 998 K (1336 °F). The corresponding turbine isentropic efficiencies for these three turbines were taken as 90, 91 and 93 percent. With these operating conditions, the zero-atmospheric emissions electric power plant has a net thermal efficiency of 46.5%. This net thermal efficiency is based on the lower heating value of methane, and includes the energy necessary for air separation and for carbon dioxide separation and sequestration.

Thermodynamic Analysis of Zero-Atmospheric Emissions Power Plant

2004 ◽  
Vol 126 (1) ◽  
pp. 2-8 ◽  
Author(s):  
Joel Martinez-Frias ◽  
Salvador M. Aceves ◽  
J. Ray Smith ◽  
Harry Brandt
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Thermodynamic Analysis ◽  
Oil Recovery ◽  
Air Separation ◽  
Working Fluid ◽  
Atmospheric Emissions ◽  
Steam Turbines ◽  
Gas Generator ◽  
Separation Unit

This paper presents a theoretical thermodynamic analysis of a zero-atmospheric emissions power plant. In this power plant, methane is combusted with oxygen in a gas generator to produce the working fluid for the turbines. The combustion produces a gas mixture composed of steam and carbon dioxide. These gases drive multiple turbines to produce electricity. The turbine discharge gases pass to a condenser where water is captured. A stream of pure carbon dioxide then results that can be used for enhanced oil recovery or for sequestration. The analysis considers a complete power plant layout, including an air separation unit, compressors and intercoolers for oxygen and methane compression, a gas generator, three steam turbines, a reheater, two preheaters, a condenser, and a pumping system to pump the carbon dioxide to the pressure required for sequestration. This analysis is based on a 400 MW electric power generating plant that uses turbines that are currently under development by a U.S. turbine manufacturer. The high-pressure turbine operates at a temperature of 1089 K (1500°F) with uncooled blades, the intermediate-pressure turbine operates at 1478 K (2200°F) with cooled blades and the low-pressure turbine operates at 998 K (1336°F). The power plant has a net thermal efficiency of 46.5%. This efficiency is based on the lower heating value of methane, and includes the energy necessary for air separation and for carbon dioxide separation and sequestration.

scholarly journals Process and Carbon Footprint Analyses of the Allam Cycle Power Plant Integrated with an Air Separation Unit

2019 ◽  
Vol 1 (1) ◽  
pp. 325-340 ◽  
Author(s):  
Dan Fernandes ◽  
Song Wang ◽  
Qiang Xu ◽  
Russel Buss ◽  
Daniel Chen
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Sensitivity Analysis ◽  
Power Plant ◽  
Carbon Footprint ◽  
Exergy Analysis ◽  
Air Separation ◽  
Working Fluid ◽  
Separation Unit ◽  
Air Separation Unit

The Allam cycle is the latest advancement in power generation technologies with a high cycle efficiency, zero NOx emission, and carbon dioxide available at pipeline specification for sequestration and utilization. The Allam cycle plant is a semi-closed, direct-fired, oxy-fuel Brayton cycle that uses high pressure supercritical carbon dioxide as a working fluid with sophisticated heat recuperation. This paper conducted process analyses including exergy analysis, sensitivity analysis, air separation unit (ASU) oxygen pump/compressor option analysis, and carbon footprint analysis for the integrated Allam power plant (natural gas)/ASU complex with a high degree of heat and work integration. Earlier works on exergy analysis were done on the Allam cycle and ASU independently. Exergy analysis on the integrated plants helps identify the equipment with the largest loss of thermodynamic efficiency. Sensitivity analysis investigated the effects of important ASU operational parameters along with equipment constraint limits on the downstream Allam cycle. Energy efficiency and carbon footprint are compared among the state-of-the-art fossil-fuel power generation cycles.

Boffalora-Ticino Hydro-Electric Power Plant

1906 ◽  
Vol 62 (1608supp) ◽  
pp. 25758-25758
Author(s):  
Alfred Gradenwitz
Keyword(s):  
Power Plant ◽  
Electric Power ◽  
Electric Power Plant
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