Slim POX Design for Gasification 4th International Freiberg Conference on IGCC & XtL Technologies 3-5. May 2010

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1 Slim POX Design for Gasification 4th International Freiberg Conference on IGCC & XtL Technologies 3-5. May 2010 H. Tautz, Dept. EV, Linde Engineering

2 Contents Introduction Kinetic modeling Reactor design Experimental results Summary 2 R&D activities Linde LE, Dept. EV.ppt

3 Introduction Operation conditions and requirements Coal components and operation conditions can have strong impact on the life cycle time of refractories. High availability of gasifiers is an issue for chemical and especially IGCC plants. Technical approach Short maintenance periods for refractory repair or exchange are required. A new reactor design will be presented, which is based on advanced kinetic modeling and new insulation concepts. 3 R&D activities Linde LE, Dept. EV.ppt

4 Kinetic modeling Principle HOMogeneous REActions (HOMREA) tool for simulation of homogeneous reaction kinetics on the basis of elementary reactions and ideal mixing Computational Fluid Dynamics (CFD) tool for simulation of fluid dynamics and reactions Link of tailored kinetics model and CFD 4 R&D activities Linde LE, Dept. EV.ppt

5 Kinetic modeling Basic reactions Oxidation (exotherm): CH4 + ½ O2 CO + 2 H2 2 H2 + O2 2H2O 2 CO + O2 2CO2 Reforming (endotherm): CH4 + H2O CO + 3 H2 C2H2 + 2 H2O 2 CO + 3 H2 Shift Reaction (exotherm): CO + H2O H2 + CO2 Acetylene production (endotherm): 2 CH4 C2H2 + 3 H2 5 R&D activities Linde LE, Dept. EV.ppt

6 Kinetic modeling Basic of calculation Calculated mass fraction and temperature with tailored model and detailed model CH4 C2H2 CH4-Detail CH4-Tailored C2H2-Detailed C2H2-Tailored y (kg/kg) y (kg/kg) t (ms) t (ms) 6 R&D activities Linde LE, Dept. EV.ppt

7 Kinetic modeling Basic of calculation Calculated mass fraction and temperature with tailored model and detailed model CO2 CO2-Detailed CO2-Tailored Temperature T-Detailed T-Tailored y (kg/kg) T (K) t (ms) t (ms) 7 R&D activities Linde LE, Dept. EV.ppt

8 Kinetic modeling Max. flame temperature Jet Burner Swirl Burner CFD with Equilibrium modell T max C CFD with Kinetic modell T max C 8 R&D activities Linde LE, Dept. EV.ppt

9 Reactor design Background, Concept & Advantages Background Conventional reactor design characterized by: major recirculation zones increased potential for soot formation complex refractory design conventional reactor design Advanced Reactor (AR) Concept new refractory material with design temperatures up to 1800 C and closed cylinder building blocks reduced reactor diameter resulting in reduced recirculation, higher reaction temperature & higher conversion Advantages lower oxygen demand reduced potential for soot formation substantially higher specific capacity preassembly of reactor with refractory with substantially reduced installation & start-up time for ATR applications: separation of combustion & catalyst zone Advanced Reactor (AR) 9 R&D activities Linde LE, Dept. EV.ppt

10 Experimental results New insulation concept in pilot plant Reaction chamber dimensions: Length: 4 m, Inner Diameter: 0.3 m Installation time for insulation with 2 layers: 8 h Tested preheating gradient: C/h Max. theoretical flame temperature: 1800 C Theory of reduced flame temperature could be proved. Operated syngas production at atmospheric pressure 600 Nm³/h. Syngas production extrapolated to 30 bar: Nm³/ h / m³reactor 10 R&D activities Linde LE, Dept. EV.ppt

11 Summary Status: Kinetic model with reduced flame temperature could be proved. New insulation concept with short installation time could be verified. New reactor design with reduced diameter and specific high production capacity could be qualified in pilot test runs for about 50 h. Follow up: Long term test and validation in pilot application Potential applications: Gas to Liquid (GTL) Integrated Gasification Combined Cycle (IGCC) Direct Reduction (DR) of iron ore. 11 R&D activities Linde LE, Dept. EV.ppt

12 Thank you for your attention.

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