Progress Update for Commercial Plants of Air Blown IGCC

2007 ◽  
Author(s):  
Takao Hashimoto ◽  
Katsuhiro Ota ◽  
Takashi Fujii
Keyword(s):  
Gas Turbines ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Air Separation ◽  
Wall Structure ◽  
Clean Coal ◽  
Separation Unit ◽  
The Us ◽  
Under Construction ◽  
Gas Price

Integrated Coal Gasification Combined Cycle (IGCC) is attracting considerable attention as clean coal technology for several reasons, including rising natural gas price, escalating environmental scrutiny and fuel diversification. Mitsubishi Heavy Industries, Ltd. (MHI) has developed an air-blown two stage entrained bed coal gasifier, which realizes the highest net plant efficiency by using a smaller ASU (Air Separation Unit), dry coal feed, and excellent reliability with a membrane water wall structure. A 250 MW demonstration plant is currently under construction in Japan and scheduled to start operation in 2007. This plant will validate MHI Air Blown technology under dispatching conditions. In the mean time, responding to increasing interest on this technology around the world, MHI is expediting the design of a 500MW IGCC plant to be operated with G class gas turbines. The MHI air blown gasifier concept is particularly attractive to the US market, not only because of the higher efficiency, when compared with oxygen blown designs, but because of its capability to handle a wide variety of coals including PRB. This paper will discuss what kind of IGCC will soon be commercially available and how it will fit practical needs in the US market showing the time schedule of realization of commercial plants and economical evaluation in addition to the technical integrity. MHI believes that IGCC is one of the most important clean coal technologies to contribute to worldwide energy security and environmental needs.

Intercooled Advanced Gas Turbines in Coal Gasification Plants, With Combined or “HAT” Power Cycle

1997 ◽  
Author(s):  
Paolo Chiesa ◽  
Giovanni Lozza
Keyword(s):  
Gas Turbines ◽  
Coal Gasification ◽  
High Efficiency ◽  
Combined Cycle ◽  
Air Separation ◽  
Heavy Duty ◽  
Power Cycle ◽  
Efficiency Assessment ◽  
The One ◽  
Conversion Efficiencies

Due to their high efficiency and flexibility, aeroderivative gas turbines were often considered as a development basis for intercooled engines, thus providing better efficiency and larger power output. Those machines, originally studied for natural gas, are here considered as the power section of gasification plants for coal and heavy fuels. This paper investigates the matching between intercooled gas turbine, in complex cycle configurations including combined and HAT cycles, and coal gasification processes based on entrained-bed gasifiers, with syngas cooling accomplished by steam production or by full water-quench. In this frame, a good level of integration can be found (i.e. re-use of intercooler heat, availability of cool, pressurized air for feeding air separation units, etc.) to enhance overall conversion efficiency and to reduce capital cast. Thermodynamic aspects of the proposed systems are investigated, to provide an efficiency assessment, in comparison with mare conventional IGCC plants based on heavy-duty gas turbines. The results outline that elevated conversion efficiencies can be achieved by moderate-size intercooled gas turbines in combined cycle, while the HAT configuration presents critical development problems. On the basis of a preliminary cost assessment, cost of electricity produced is lower than the one obtained by heavy-duty machines of comparable size.

Next-Generation Integration Concepts for Air Separation Units and Gas Turbines

1997 ◽  
Vol 119 (2) ◽  
pp. 298-304 ◽  
Author(s):  
A. R. Smith ◽  
J. Klosek ◽  
D. W. Woodward
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Pressure Ratio ◽  
Elevated Pressure ◽  
Gas Production ◽  
Combined Cycle ◽  
Air Separation ◽  
Control Measures ◽  
Next Generation ◽  
Separation Unit

The commercialization of Integrated Gasification Combined Cycle (IGCC) Power has been aided by concepts involving the integration of a cryogenic air separation unit (ASU) with the gas turbine combined-cycle module. Other processes, such as coal-based ironmaking and combined power/industrial gas production facilities, can also benefit from the integration. It is known and now widely accepted that an ASU designed for “elevated pressure” service and optimally integrated with the gas turbine can increase overall IGCC power output, increase overall efficiency, and decrease the net cost of power generation when compared to nonintegrated facilities employing low-pressure ASUs. The specific gas turbine, gasification technology, NOx emission specification, and other site specific factors determine the optimal degree of compressed air and nitrogen stream integration. Continuing advancements in both air separation and gas turbine technologies offer new integration opportunities to improve performance and reduce costs. This paper reviews basic integration principles and describes next-generation concepts based on advanced high pressure ratio gas turbines, Humid Air Turbine (HAT) cycles and integration of compression heat and refrigeration sources from the ASU. Operability issues associated with integration are reviewed and control measures are described for the safe, efficient, and reliable operation of these facilities.

scholarly journals Integration of Air Separation Unit With H2 Separation Membrane Reactor in Coal-Based Power Plant

2006 ◽  
Author(s):  
A. D. Rao ◽  
D. Francuz ◽  
A. Verma ◽  
G. S. Samuelsen
Keyword(s):  
Gas Turbines ◽  
Total Pressure ◽  
Carbon Capture ◽  
Membrane Reactor ◽  
Coal Gasification ◽  
Air Separation ◽  
Fuel Gas ◽  
Separation Unit ◽  
Separation Membrane ◽  
Air Separation Unit

A novel process configuration consisting of integrating the air separation unit with a H2 separation membrane reactor (HSMR) in a coal gasification based coproduction facility with near zero emissions is described. The plant utilizes an air separation unit operating at elevated pressure to produce an Intermediate Pressure (IP) N2 stream in addition to the O2 required by the coal gasifier. The syngas produced by the gasifier after cleanup is supplied to the membrane reactor which produces H2 by shifting the carbon monoxide while simultaneously separating the H2. The IP N2 is used as sweep gas to assist in the separation of the H2 diffusing across the membrane walls by decreasing the partial pressure of the H2 on the permeate side. The total pressure of gases on the permeate side may thus be increased such that the H2 / N2 mixture may be fed directly to the gas turbines at the required pressure without requiring cooling and compression of the H2. An added advantage is that the total pressure differential across the membrane wall is reduced. The N2 in the fuel gas functions both as a thermal diluent for reducing the formation of nitrogen oxides and as additional motive fluid for expansion in the turbine. The carbon dioxide rich gas (non-permeate) leaving the membrane reactor after catalytic oxidation of the residual combustibles constitutes the carbon capture stream which may be further compressed and pipelined for CO2 sequestration. High purity H2 may be coproduced for export from a portion of the H2-N2 stream leaving the HSMR utilizing a Pressure Swing Adsorption (PSA) unit. The techno-economic advantages of such a coproduction facility are addressed.

scholarly journals Next-Generation Integration Concepts for Air Separation Units and Gas Turbines

1996 ◽  
Author(s):  
Arthur R. Smith ◽  
Joseph Klosek ◽  
Donald W. Woodward
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Pressure Ratio ◽  
Elevated Pressure ◽  
Gas Production ◽  
Combined Cycle ◽  
Air Separation ◽  
Control Measures ◽  
Next Generation ◽  
Separation Unit

The commercialization of Integrated Gasification Combined Cycle (IGCC) power has been aided by concepts involving the integration of a cryogenic air separation unit (ASU) with the gas turbine combined-cycle module. Other processes, such as coal-based ironmaking and combined power/industrial gas production facilities, can also benefit from the integration. It is known and now widely accepted that an ASU designed for “elevated pressure” service and optimally integrated with the gas turbine can increase overall IGCC power output, increase overall efficiency, and decrease the net cost of power generation when compared to non-integrated facilities employing low pressure ASU’s. The specific gas turbine, gasification technology. NOx emission specification, and other site specific factors determine the optimal degree of compressed air and nitrogen stream integration. Continuing advancements in both air separation and gas turbine technologies offer new integration opportunities to improve performance and reduce costs. This paper reviews basic integration principles and describes next-generation concepts based on advanced high pressure ratio gas turbines, Humid Air Turbine (HAT) cycles and integration of compression heat and refrigeration sources from the ASU. Operability issues associated with integration are reviewed and control measures are described for the safe, efficient and reliable operation of these facilities.

The Puertollano IGCC Project, a 335 MW Demonstration Power Plant for the Main Electricity Companies in Europe

1995 ◽  
Vol 13 (6) ◽  
pp. 649-668 ◽  
Author(s):  
Ulpiano Sendin
Keyword(s):  
Power Plant ◽  
Flue Gas ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Air Separation ◽  
Separation Unit ◽  
Gasification Process ◽  
The Status ◽  
Combined Cycle Plant ◽  
One Year

The paper describes the status of the 335 Mwe gross (ISO conditions) IGCC project of ELCOGAS in Puertollano/Spain based on the PRENFLO coal gasification process, at the beginning of its third year of engineering and construction. The project is funded within the Thermie programme of the Commission of the European Communities, being its first targeted project. The status of the IGCC project is presented. Coal gasification is based on the PRENFLO entrained-flow principle with dry fuel dust feeding. An almost complete raw gas desulphurization leads to very low SO2 contents in the flue gas. Sulphur from the coal will be available as elemental sulphur. By saturation of the desulphurized gas and the mixing with the nitrogen from the air separation unit the integrated power plant concept also achieves very low NOx contents in the flue gas. Commissioning tests for the combined cycle plant fed with natural gas will start during mid-1995. and will be followed by one year plant operation, before commissioning of the IGCC power plant.

Performance Assessment of an Integrated Gasification Combined Cycle Under Flexible Operation

2018 ◽  
Author(s):  
S. Ravelli ◽  
A. Perdichizzi
Keyword(s):  
Power Output ◽  
Gas Turbines ◽  
Combined Cycle ◽  
Air Separation ◽  
Load Factor ◽  
Integrated Gasification Combined Cycle ◽  
Separation Unit ◽  
Partial Load ◽  
Integrated Gasification ◽  
Flexible Operation

In this paper a simulation tool (Thermoflex®) has been setup to model an entire Integrated Gasification Combined Cycle (IGCC) on the basis of the report entitled “Cost and Performance of PC and IGCC Plants for a Range of Carbon dioxide Capture” by DOE/NETL [1]. The investigated layout has no water-gas-shift (WGS) reactor and does not allow for any CO2 capture. Two gasification islands are included, each of which consists of Air Separation Unit (ASU), GEE radiant-only gasifier, quench and syngas scrubber as well as syngas cleanup. Two advanced GE’s F-class gas turbines (2 × 232 MW), coupled with two heat recovery steam generators and one steam turbine (276 MW) constitute the power block. In the IGCC simulation, the base model of the GE 7F.05 gas turbine has been adapted to burn syngas. Mass and energy balances were carefully computed on design condition to validate the proposed modelling procedure against the IGCC performance data contained in the above mentioned report: the net power output of 622 MW was underestimated by about 5% whereas the net electric efficiency was slightly overpredicted. The off-design behavior of the syngas turbine was then simulated as dependent on ambient temperature and partial load, in preparation for modelling flexible operation of the whole power plant. The variation in IGCC net efficiency and power output was assessed in a load following operational strategy, thus reducing the load factor and varying the number and slope of ramps in a typical day. The IGCC net efficiency goes down from 42.5% to 32.8% when the load is reduced from 100% to 40% of the design rate.

New Technology Trends for Improved IGCC System Performance

1995 ◽  
Author(s):  
A. K. Anand ◽  
C. S. Cook ◽  
J. C. Corman ◽  
A. R. Smith
Keyword(s):  
System Design ◽  
Gas Turbine ◽  
Gas Turbines ◽  
New Technology ◽  
Operating Cost ◽  
Careful Consideration ◽  
Combined Cycle ◽  
Air Separation ◽  
Separation Unit ◽  
Primary Output

The application of gas turbine technology to IGCC systems requires careful consideration of the degree and type of integration used during the system design phase. Although gas turbines provide the primary output and efficiency gains for IGCC systems, as compared with conventional coal fired power generation systems, they are commercially available only in specific size ranges. Therefore, it is up to the IGCC system designer to optimize the IGCC power plant within the required output, efficiency and site conditions by selecting the system configuration carefully, particularly for air separation unit (ASU) integration incorporated with oxygen blown gasification systems. An IGCC system, based on a generic, entrained flow, oxygen blown gasification system and a GE STAG 109FA combined cycle has been evaluated with varying degrees of ASU integration, two fuel equivalent heating values and two gas turbine firing temperatures to provide net plant output and efficiency results. The data presented illustrate the system flexibility afforded by variation of ASU integration and the potential performance gains available through the continued use of gas turbine advances. Emphasis is place on system design choices which favor either low initial investment cost or low operating cost for a given IGCC system output.

New Technology Trends for Improved IGCC System Performance

1996 ◽  
Vol 118 (4) ◽  
pp. 732-736 ◽  
Author(s):  
A. K. Anand ◽  
C. S. Cook ◽  
J. C. Corman ◽  
A. R. Smith
Keyword(s):  
System Design ◽  
Gas Turbine ◽  
Gas Turbines ◽  
New Technology ◽  
Operating Cost ◽  
Careful Consideration ◽  
Combined Cycle ◽  
Air Separation ◽  
Separation Unit ◽  
Primary Output

The application of gas turbine technology to IGCC systems requires careful consideration of the degree and type of integration used during the system design phase. Although gas turbines provide the primary output and efficiency gains for IGCC systems, as compared with conventional coal-fired power generation systems, they are commercially available only in specific size ranges. Therefore, it is up to the IGCC system designer to optimize the IGCC power plant within the required output, efficiency, and site conditions by selecting the system configuration carefully, particularly for air separation unit (ASU) integration incorporated with oxygen blown gasification systems. An IGCC system, based on a generic, entrained flow, oxygen blown gasification system and a GE STAG 109FA combined cycle has been evaluated with varying degrees of ASU integration, two fuel equivalent heating values and two gas turbine firing temperatures to provide net plant output and efficiency results. The data presented illustrate the system flexibility afforded by variation of ASU integration and the potential performance gains available through the continued use of gas turbine advances. Emphasis is placed on system design choices that favor either low initial investment cost or low operating cost for a given IGCC system output.

scholarly journals Development of a Low-NOx LBG Combustor for Coal Gasification Combined Cycle Power Generation Systems

1989 ◽  
Author(s):  
M. Sato ◽  
T. Abe ◽  
T. Ninomiya ◽  
T. Nakata ◽  
T. Yoshine ◽  
...  
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Generation System ◽  
Combustion Technology ◽  
Power Generation System ◽  
Combustion Tests ◽  
Power Generation Systems

From the view point of future coal utilization technology for the thermal power generation systems, the coal gasification combined cycle system has drawn special interest recently. In the coal gasification combined cycle power generation system, it is necessary to develop a high temperature gas turbine combustor using a low-BTU gas (LBG) which has high thermal efficiency and low emissions. In Japan a development program of the coal gasification combined cycle power generation system has started in 1985 by the national government and Japanese electric companies. In this program, 1300°C class gas turbines will be developed. If the fuel gas cleaning system is a hot type, the coal gaseous fuel to be supplied to gas turbines will contain ammonia. Ammonia will be converted to nitric oxides in the combustion process in gas turbines. Therefore, low fuel-NOx combustion technology will be one of the most important research subjects. This paper describes low fuel-NOx combustion technology for 1300°C class gas turbine combustors using coal gaseous low-BTU fuel as well as combustion characteristics and carbon monoxide emission characteristics. Combustion tests were conducted using a full-scale combustor used for the 150 MW gas turbine at the atmospheric pressure. Furthermore, high pressure combustion tests were conducted using a half-scale combustor used for the 1 50 MW gas turbine.

scholarly journals Potential Applications of Structural Ceramic Composites in Gas Turbines

1990 ◽  
Author(s):  
W. P. Parks ◽  
R. R. Ramey ◽  
D. C. Rawlins ◽  
J. R. Price ◽  
M. Van Roode
Keyword(s):  
Gas Turbines ◽  
Ceramic Composite ◽  
Coal Gasification ◽  
Turbine Rotor ◽  
Ceramic Composites ◽  
Combined Cycle ◽  
Rotor Blades ◽  
Structural Ceramic ◽  
Cycle Systems ◽  
Potential Applications

A Babcock and Wilcox - Solar Turbines Team has completed a program to assess the potential for structural ceramic composites in turbines for direct coal-fired or coal gasification environments. A review is made of the existing processes in direct coal firing, pressurized fluid bed combustors, and coal gasification combined cycle systems. Material requirements in these areas were also discussed. The program examined the state-of-the-art in ceramic composite materials. Utilization of ceramic composites in the turbine rotor blades and nozzle vanes would provide the most benefit. A research program designed to introduce ceramic composite components to these turbines was recommended.

Sign in / Sign up

Export Citation Format

Share Document