This article presents an overview of H2-IGCC research project. This project focuses on developing gas turbine (GT) technology optimised for the next generation. The H2-IGCC project is coordinated by the Brussels-based European Turbine Network (ETN)—an association with members of all stakeholders across the GT technology development value chain. ETN promotes environmentally sound gas turbine technology with reliable and low-cost operation. The objective of the H2-IGCC project is to provide and demonstrate technical solutions for state-of-the-art, high-efficiency, low-emissions GT technology that can be employed to IGCC applications. More specifically, the goal is to enable combustion of undiluted hydrogen-rich syngas with low NOx emissions and also allowing for high fuel flexibility. The challenge is to operate a stable and controllable GT on hydrogen-rich syngas with emissions and processes similar to current state-of-the-art natural GT engines.

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In November 2009 the four-year H2-IGCC research project kicked-off, co-funded by 24 partners, from both the academic and industrial sector, as well as the European Union (EU), under the Seventh Framework Programme for Research and Development (FP7).

The project focuses on developing gas turbine (GT) technology optimised for the next generation Integrated Gasification Combined Cycle plants with Carbon Capture and Storage (IGCC-CCS).

The H 2 -IGCC project is coordinated by the Brussels-based European Turbine Network (ETN)- an association with members of all stakeholders across the GT technology development value chain (power generation, mechanical drive and marine applications). ETN promotes environmentally sound gas turbine technology with reliable and low cost operation.

The objective of the H 2 -IGCC project is to provide and demonstrate technical solutions for state-of-the-art, high efficiency, low emissions GT technology that can be employed to IGCC applications. More specifically, the goal is to enable combustion of undiluted hydrogen-rich syngas with low NOx emissions and also allowing for high fuel flexibility. The challenge is to operate a stable and controllable GT on hydrogen-rich syngas with emissions and processes similar to current state-of-the-art natural GT engines. The Hz-IGCC project aims to tackle this challenge as well as fuel flexibility, by enabling the burning of back-up fuels, such as natural gas, without adversely affecting the reliability and availability.

The EU has conceded that to reach its 20% emissions reduction target by 2020 (which will possibly be increased to 30%) it will require carbon capture and storage (CCS), the only technology available to mitigate emissions from large-scale fossil fuel usage. CCS is also a vital pillar in the European Commission's Strategic Energy Technology Plan (SET-Plan), which seeks to meet the emissions reduction goals while building a low carbon economy with reduced dependence on external fuel supply.

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The target year of 2020 for CCS deployment in the EU is only achievable if different parts of the efficiency chain are improved in building near zero emission power plants. The technology for the next generation of iGCC plants with CCS is promising but still requires development and demonstration of hydrogen GT technology as well as overall process integration. This process integration approach used in the H 2-IGCC project will enhance confidence and significantly reduce deployment times for new technologies and concepts developed in·this project.

The H 2-IGCC project brings together 24 partners from industry and academia with the common goal to increase gas turbine efficiency and fuel flexibility without affecting the reliability and availability in a pre-combustion IGCC-CCS plant configuration. A successful outcome of this project will be an important step towards opening up the market for a commercial implementation of iGCC-CCS technology.

In the fields of combustion, materials and turbomachinery, academic research and industrial testing activities have begun, while common terms for boundary conditions were identified in order to work towards the optimum IGCC plant configurations. In the first six months of the project, reports on state-of-the-art IGCC technologies, kinetic mechanisms and plant modelling resources have been published on the project website.

Over the past decade, a number of initiatives on clean coal technology and IGCC have started around the world. Successful mitigation of climate change requires global efforts. Therefore, international knowledge sharing is essential to significantly reduce the time and the cost of bringing CCS to the market. In order for industry to invest in the next generation of iGCC plants with CCS systems, both technical and commercial risks need to be quantified and minimized, especially those associated with the GT. To further this process, the public research findings and results drawn from the H 2 -IGCC project will be disseminated at international conferences and on the project website: www.h2-igcc.eu.

The H2-IGCC project addresses the technical challenges related to GT in 4 Sub-Projects (SPs): 
COMBUSTION (SPD MATERIALS ISP2I 
Safe and low emission combustion technology for undiluted, hydrogen-rich syngas will be developed and demonstrated.
In, order to achieve this, emblems resulting from the differences in combustion properties of hydrogen and natural gas need to be addressed and solved. These are higher flame speed, higher adiabatic: flame temperature, drastically reduced auto-ignition delay times and the large increase in volumetric fuel flow rate of hydrogen compared to natural gas. 
Cost-effective materials and coatings technologies will be developed to overcome the component life-limiting problems of overheating and of hot corrosion resulting from the higher temperatures and residual contaminants in the syngas, including validation of materials performance data. Life prediction and monitoring methods.
Simulation tools for estimating performance and lifetime of materials systems will also be enhanced to suit the new operating environments. 
TURBOMACHINERY (5P3) SYSTEM ANALYSIS ÏSP4! 
Modified compressor, turbine and turbine cooling designs will be delivered. Compressor stable operation should enable the switch between fuels without compromising efficiency with the increased fuel mass flow rate (fiat could lead lo compressor instability.
Turbine design has to cope with a different enthalpy drop, while the turbine cooling system has to cope with the higher specific heat of the exhaust gases, This will result in increased operating temperatures of the components in comparison with natural gas-fired gas turbines. Potential turbine vibration problems will also be addresses. 
System analysis will evaluate the optimum IGCC plant configurations and set up guidelines for optimised full scale integration providing a detailed system analysis that generates realistic techno- economical results for future gas turbine based IGCC plants with CCS.
The compatibility of the combution technology with the materials and turbo-machinery requirements will be optimised. 
The H2-IGCC project addresses the technical challenges related to GT in 4 Sub-Projects (SPs): 
COMBUSTION (SPD MATERIALS ISP2I 
Safe and low emission combustion technology for undiluted, hydrogen-rich syngas will be developed and demonstrated.
In, order to achieve this, emblems resulting from the differences in combustion properties of hydrogen and natural gas need to be addressed and solved. These are higher flame speed, higher adiabatic: flame temperature, drastically reduced auto-ignition delay times and the large increase in volumetric fuel flow rate of hydrogen compared to natural gas. 
Cost-effective materials and coatings technologies will be developed to overcome the component life-limiting problems of overheating and of hot corrosion resulting from the higher temperatures and residual contaminants in the syngas, including validation of materials performance data. Life prediction and monitoring methods.
Simulation tools for estimating performance and lifetime of materials systems will also be enhanced to suit the new operating environments. 
TURBOMACHINERY (5P3) SYSTEM ANALYSIS ÏSP4! 
Modified compressor, turbine and turbine cooling designs will be delivered. Compressor stable operation should enable the switch between fuels without compromising efficiency with the increased fuel mass flow rate (fiat could lead lo compressor instability.
Turbine design has to cope with a different enthalpy drop, while the turbine cooling system has to cope with the higher specific heat of the exhaust gases, This will result in increased operating temperatures of the components in comparison with natural gas-fired gas turbines. Potential turbine vibration problems will also be addresses. 
System analysis will evaluate the optimum IGCC plant configurations and set up guidelines for optimised full scale integration providing a detailed system analysis that generates realistic techno- economical results for future gas turbine based IGCC plants with CCS.
The compatibility of the combution technology with the materials and turbo-machinery requirements will be optimised.