Thermal efficiency of advanced integrated coal gasification combined cycle power generation systems with low-temperature gasifier, gas cleaning and CO2 capturing units

2017 ◽  
Vol 164 ◽  
pp. 80-91 ◽  
Author(s):  
Ryouhei Hoya ◽  
Chihiro Fushimi
Keyword(s):  
Power Generation ◽  
Low Temperature ◽  
Thermal Efficiency ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Gas Cleaning ◽  
Co2 Capturing ◽  
Power Generation Systems

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.

Advanced Hot Gas Cleaning System for Coal Gasification Processes

1994 ◽  
Vol 116 (2) ◽  
pp. 338-344 ◽  
Author(s):  
R. A. Newby ◽  
R. L. Bannister
Keyword(s):  
United States ◽  
Power Generation ◽  
Coal Gasification ◽  
The United States ◽  
Combined Cycle ◽  
Department Of Energy ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Cleaning System ◽  
Hot Gas Cleaning

The United States electric industry is entering a period where growth and the aging of existing plants will mandate a decision on whether to repower, add capacity, or do both. The power generation cycle of choice, today, is the combined cycle that utilizes the Brayton and Rankine cycles. The combustion turbine in a combined cycle can be used in a repowering mode or in a greenfield plant installation. Today’s fuel of choice for new combined cycle power generation is natural gas. However, due to a 300-year supply of coal within the United States, the fuel of the future will include coal. Westinghouse has supported the development of coal-fueled gas turbine technology over the past thirty years. Working with the U.S. Department of Energy and other organizations, Westinghouse is actively pursuing the development and commercialization of several coal-fueled processes. To protect the combustion turbine and environment from emissions generated during coal conversion (gasification/combustion) a gas cleanup system must be used. This paper reports on the status of fuel gas cleaning technology and describes the Westinghouse approach to developing an advanced hot gas cleaning system that contains component systems that remove particulate, sulfur, and alkali vapors. The basic process uses ceramic barrier filters for multiple cleaning functions.

Advanced Hot Gas Cleaning System for Coal Gasification Processes

1993 ◽  
Author(s):  
R. A. Newby ◽  
R. L. Bannister
Keyword(s):  
United States ◽  
Power Generation ◽  
Coal Gasification ◽  
The United States ◽  
Combined Cycle ◽  
Department Of Energy ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Cleaning System ◽  
Hot Gas Cleaning

The United States electric industry is entering a period where growth and the aging of existing plants will mandate a decision on whether to repower, add capacity or do both. The power generation cycle of choice, today, is the combined cycle that utilizes the Brayton and Rankine cycles. The combustion turbine in a combined cycle can be used in a repowering mode or in a greenfield plant installation. Today’s fuel of choice for new combined cycle power generation is natural gas. However, due to a 300-year supply of coal within the United States, the fuel-of-the future will include coal. Westinghouse has supported the development of coal-fueled gas turbine technology over the past thirty years. Working with the U.S. Department of Energy and other organizations, Westinghouse is actively pursuing the development and commercialization of several coal-fueled processes. To protect the combustion turbine and environment from emissions generated during coal conversion (gasification/combustion) a gas cleanup system must be used. This paper reports on the status of fuel gas cleaning technology and describes the Westinghouse approach to developing an advanced hot gas cleaning system that contains component systems that remove particulate, sulfur, and alkali vapors. The basic process uses ceramic barrier filters for multiple cleaning functions.

scholarly journals An Overview of Recent Clean Coal Gasification Technology R&D Activities Supported by the European Commission

1998 ◽  
Author(s):  
A. J. Minchener
Keyword(s):  
Power Generation ◽  
European Commission ◽  
Coal Gasification ◽  
High Efficiency ◽  
Renewable Energy Sources ◽  
Combined Cycle ◽  
Solid Particles ◽  
Biomass Waste ◽  
Fuel Gas ◽  
Gas Cleaning

Gasification combined cycle has the potential to provide a clean, high efficiency, low environmental impact power generation system. A prime fuel for such systems is coal but there is scope in part to utilise renewable energy sources including biomass and waste materials such as sewage sludge or even oil residues. There is considerable scope to improve the performance of the first generation systems of gasification combined cycle plant, both through design changes and through the continued development towards second generation plant. Such improvements offer the prospect of even better efficiency, coal/biomass/waste utilisation flexibility, lower emissions especially of CO2, and lower economic cost of power generation. There have been several major R&D initiatives, supported in part by the European Commission, which have been designed to meet these aims. The approach adopted has been to form multi-partner project teams comprising industry, industrial research organisations and selected universities. The main technical issues that have been considered include co-gasification, e.g. co-feeding, fuel conversion, gas quality, contaminants, component developments, and the integration of hot fuel gas cleaning systems for removal of solid particles, control of sulphur emissions, control of fuel bound nitrogenous species, removal of halides and control of alkali species. The technical R&D activities have been underpinned by several major techno-economic assessment studies. This paper provides an overview of these various activities which either form part of the European Commission JOULE Coal R&D Programme or were supported under an APAS special initiative.

scholarly journals Utilization of Coal-Derived Fuel in Advanced Power Generation Systems: An Evaluation

1982 ◽  
Author(s):  
R. D. Lessard ◽  
F. L. Robson ◽  
W. A. Blecher ◽  
A. W. Carlson
Keyword(s):  
Power Generation ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Molten Carbonate Fuel Cell ◽  
Molten Carbonate ◽  
Study Program ◽  
Fuel Gas ◽  
Power Generation Systems ◽  
Power Costs ◽  
Carbonate Fuel Cell

This paper highlights a recently completed study program to evaluate the performance and cost of advanced power generation systems which utilize coal-derived, medium-Btu fuel gas. Three advanced power generation systems are covered: combined-cycle gas turbine, molten carbonate fuel cell, and open-cycle MHD/steam. Two coal gasification processes for supplying the medium-Btu fuel gas are considered; they are the oxygen-blown Texaco process and British Gas Corporation/Lurgi process or simply BGC process. Descriptions of the advanced power generation systems and of the medium-Btu fuel gas supplied by the gasification processes are provided. The performance of each of the advanced power generation systems is evaluated when utilizing coal-derived, medium-Btu fuel gas supplied 1) via pipeline from each of the two coal gasifiers, and 2) through integration with each of the two coal gasifiers. Estimates of electric power costs are given.

Performance of IGFC With Exergy Recuperation

2014 ◽  
Author(s):  
Norihiko Iki ◽  
Osamu Kurata ◽  
Atsushi Tsutsumi
Keyword(s):  
Power Generation ◽  
Thermal Efficiency ◽  
Gas Turbines ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Solid Oxide ◽  
Low Grade ◽  
Efficient System ◽  
Steam Reformer ◽  
Exhaust Heat

The Integrated coal Gasification Combined Cycle (IGCC) is considered to be a very clean and efficient system for coal-fired power generation. And given the development of 100 MW-scale solid oxide fuels cells (SOFCs), the integrated coal Gasification Fuel Cell combined cycle (IGFC) would be the most efficient coal-fired power generation system. However, more energy efficient power generation systems must be developed in order to reduce CO2 emissions over the middle and long term. Thus, the authors have proposed the Advanced Integrated coal Gasification Combined Cycle (A-IGCC) and Advanced IGFC (A-IGFC) systems, which utilize exhaust heat from solid oxide fuel cells (SOFCs) and/or gas turbines as a heat source for gasification (exergy recuperation). The A-IGCC and A-IGFC systems utilize a twin circulating fluidized bed coal gasifier consisting of three primary components: a pyrolyzer, steam reformer and partial combustor. The temperature of the steam reformer is 800 °C, and that of the partial oxidizer is 950 °C. Since the syngas, produced by pyrolysis and the reforming process involving volatile hydrocarbons, tar and char, contains carbon monoxide and hydrogen, the A-IGCC technology has considerable potential for higher thermal efficiency while utilizing low-grade coals. The coal types utilized in the study were bituminous Taiheiyo, sub-bituminous Adaro and Loy Yang coal. Milewski’s formula was used to model the circuit voltage of the SOFC. Cool gas efficiency increases, in order, from Taiheiyo coal to Adaro coal to Loy Yang coal. The A-IGFC system has the potential to achieve high thermal efficiency using various coals, with Loy Yang coal achieving the highest thermal efficiency. However, the drying process for Loy Yang and Adaro coal is an important issue.

scholarly journals Effect of Pressure on Combustion Characteristics in LBG–Fueled 1300°C–Class Gas Turbine

1993 ◽  
Author(s):  
Toshihiko Nakata ◽  
Mikio Sato ◽  
Toru Ninomiya ◽  
Toshiyuki Yoshine ◽  
Masahiko Yamada
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Coal Gasification ◽  
Combustion Process ◽  
Combined Cycle ◽  
Combustion Characteristics ◽  
Inlet Temperature ◽  
Gas Cleaning ◽  
Effect Of Pressure

Developing integrated coal gasification combined cycle systems ensures that Japan will have cost–effective and environmentally sound options for supplying future power generation needs. The reduction of NOx emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in IGCC. The coal gasified fuel, which is produced in a coal gasifier of air–blown entrained–flow type has calorific value as low as 1/10 of natural gas. Furthermore the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. The study is performed in 1300°C–class gas turbine combustor firing coal–gasified fuel in IGCC power generation systems. In the previous study the advanced rich–lean combustor of 150–MW class gas turbine was designed to hold stable combustion burning low–Btu gas fuel and to reduce fuel NOx emission that is produced from the ammonia in the fuel. By testing it under atmospheric pressure conditions, we have studied the effects of fuel parameters on combustor performances and listed the basic data for development applications. In this study, by testing it under pressurized conditions, we have obtained a very significant result through investigating the effect of pressure on combustion characteristics and wish to provide herein a summary of our findings.

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