The Siemens Fuel Gasification (SFG) technology can gasify a wide range of feedstocks including petcoke, hard coal, lignite, and low rank fuels like refinery residuals and biomass. The technology has been selected for a number of projects in the past year. Applications range from chemicals & hydrogen production to IGCC. Commissioning of our first SFG-500 gasifiers is expected to start in 2009. This paper will review the SFG technology and current projects. This paper will also describe Siemens’ approach to provide gasification solutions depending on rank of coal, ash composition and ash content. These particular parameters define operability and applicability of entrained flow gasification systems which operate well above ash melting point. Slag characterization is essential for slag flowing behavior, agglomeration and leachability. Gasification test runs in combination with slag viscosity analysis and determination of fusion temperature provide sufficient confidence to decide on optimal gasification temperature and potential addition of well selected flux material. Finally, the paper will review the extensive research and development program that is underway at Siemens to improve design features of our SFG technology with a focus on customer requirements such as high availability and low maintenance.

The Advanced Hydrogen Turbine Development Project objective is to design and develop a fuel flexible (coal derived hydrogen or syngas) advanced gas turbine for Integrated Gasification Combined Cycle (IGCC) and FutureGen type applications that meets the U.S. Department of Energy (DOE) turbine performance goals. The overall DOE Advanced Power System goal is to conduct the Research and Development necessary to produce CO2 sequestration ready coal-based IGCC power systems with high efficiency (45-50% [HHV]), near zero emissions (< 2 ppm NOx @ 15% O2) and competitive plant capital cost (< $1000/kW). DOE has awarded Siemens Power Generation a contract for Phases 1 and 2 development work. Phase 1 activities will include identification of advanced technologies required to achieve the Project goals, detailed Research & Development Implementation Plan preparation and conceptual designs for the new gas turbine components. This paper describes Phase 1 activities and accomplishments in the first 9 months since the program was initiated.

This paper studies the feasibility of retrofitting existing gas turbines of Natual Gas Combined Cycle (NGCC) power plants to burn syngas, with a focus on the water/steam cycle design limitations and necessary changes. It shows how the gasification island processes can be treated independently and then integrated with the power block to make retrofitting possible. This paper provides a starting point to incorporate the gasification technology to current natural gas plants with minor redesigns.

This paper addresses the results of the comprehensive development program initiated to allow syngas operation of the SGT6-5000F in IGCC applications while maintaining the gas turbine systems availability and reliability at levels expected by the industry.

In response to these market needs, Siemens Power Generation has developed a 2x1 (2-on-1) reference power block based on the utilization of our SGT6-5000F gas turbine which has undergone extensive verification for IGCC applications. This reference power block is known as the SGCC6-5000F 2x1 and the subject of this paper is to provide an overview of some of the key design features of this plant.

This paper discusses the extensive development programs that have been carried out to demonstrate that target emissions and engine operability can be achieved on syngas operation in advanced F-class 50 Hz and 60 Hz gas turbine based IGCC applications.