Analysis campaign for measurement of oxy-combustion flue gas from Coal Fired Plants

Transcription

1 Analysis campaign for measurement of oxy-combustion flue gas from Coal Fired Plants 15 May 2014 Morgane Rivière, Daniel Missault, Patrick Mauvais, Samuel Daeden, Grégoire Béasse, Claire Bourhy-Weber, Jean-Marc Rabillier, Martine Carré R&D

2 Agenda Callide Oxyfuel Project Analytical challenges Callide analysis campaign Results Conclusions Research & Development

3 Agenda Callide Oxyfuel Project Analytical challenges Callide analysis campaign Results Conclusions Research & Development

4 Callide Oxyfuel Project - Introduction Analytical laboratory Callide Australia 30 MWe demonstration of the CO 2 capture for steam & power production in Australia with hard coal Retrofit of existing Callide coal power plant 2 x 330 TPD ASU Oxy-combustion retrofit 75 TPD CO 2 recovery Research & Development

5 CPU - CO 2 Compression & Purification Unit objectives Demonstrate the whole oxy-coal flue gas compression and purification chain CO 2 purity High CO 2 recovery rate Enable cost reduction and performance improvements for large scale units Optimize impurity removal (including upstream flue gas purification) Provide feed back from plant operation Corrosion Impurity behavior throughout the process (particulate matter, SOx, NOx, Hg) Research & Development

6 CPU CO 2 Compression & Purification Unit Wide range of challenging conditions for gas and condensate analysis Driers Pressure Temperature Moisture and impurities Compressor LP scrubber HP scrubber Cold box (connected to field gas analyzers) CPU T ( 0 C) P (bar) Particulate content (mg.m -3 ) Moisture content (%) CO 2 (%) N 2 (%) CO (ppm) SO 2 (ppm) NO x (ppm) O 2 (%) Inlet Outlet Dry basis, molar composition Research & Development

7 Agenda Callide Oxyfuel Project Analytical challenges Callide analysis campaign Results Conclusions Research & Development

8 Analytical challenges - Analyzers Gas composition will change as it progresses through the CPU Analytes: NOx, SOx, H 2 O, HCl, Hg, N 2, Ar, O 2 in CO 2 Prior to cryogenic purification NDIR-based analyzer including ZrO 2 oxygen probe Mercury analyzer Liquid analysis of anions with Ionic Chromatography Cryogenic purification part NOx with a chemiluminescence-based analyzer Air gases: µgc/tcd Research & Development

9 Analytical challenges Preliminary work Reliability of measurements must be validated for each analytical tool Critical when matrix, temperature & pressure vary significantly Evaluation of cross interferences Cross interference identification and analyzer performance evaluation Synthetic gas generator NO, NO 2, SO 2, HF, HCl, O 2, N 2, H 2 O, CO 2 and Hg Corrections and modifications implemented on some analyzers Evaluation of Uncertainty Research & Development

10 Analytical challenges Sampling system Sampling system for a CO2-rich flue gas over the entire process Must be appropriately specified for accurate analysis Wide range of conditions Fast loops for rapid sample transfer Prior to cryogenic purification Heated lines (up to 60 m) Heated sample panels & specific heated sample probes Specific materials for Hg analysis (Teflon, Silcosteel) Cryogenic purification Stainless steel tubing Heated sample panels Vaporizer Research & Development

11 Agenda Callide Oxyfuel Project Analytical challenges Callide analysis campaign Results Conclusions Research & Development

12 Analysis campaign Multi-component analyzer Multi-Component analyzer based on NDIR Good results obtained over the whole process on specified sample points Comparison of the results with process analyzers installed on site SO 2 readings higher on the process analyzer Test with calibration gas cylinders on the process analyzer Gas cylinder SO 2 reading (ppmv) CO 2 reading (%) 55% CO 2 balance N % CO 2 balance N % N CO 2 interference Correction model underestimated Importance of the pre-work on cross interferences Research & Development

13 Analysis campaign Mercury analysis Analyzer based on cold vapor atomic fluorescence with a gold coated adsorption/ desorption system Total mercury analysis from the outlet of the dryers to the CPU inlet Different collection times (30 s and 10 min) on the gold trap depending on mercury levels Inlet cold box Hg tot < 0,1 µg/nm Research & Development

14 Analysis campaign CO 2 product analysis Ar, O 2, N 2, CO and CO 2 analysis Frequent column reconditioning for good resolution of Ar/O 2 peaks Determination of % levels O 2 as well as low O 2 concentrations NO/NOx analysis Concentration levels between low ppm to low % levels Results Analysis of the CO 2 gas product Component Concentration Good analytical measurements obtained on site High purity CO 2 achieved at the CPU outlet CO 2 SO 2 NOx H 2 O O 2 > 99,9% vol < 1 ppmv < 20 ppmv < 20 ppmv < 30 ppmv Research & Development

15 Agenda Callide Oxyfuel Project Analytical challenges Callide analysis campaign Results Conclusions Research & Development

16 Conclusions Reliable results obtained thanks to the prior analyzer evaluation Data obtained helped to better understand the CPU Performances of the CPU as expected Demonstration of the concept with more than 2200 hours of operation Callide pilot tests results : good contribution to Cryocap TM FutureGen 2.0 demonstrator design 2 d test campaign in 2014 Acknowledgement Research & Development

17 Research & Development Opening new ways THANK YOU FOR YOUR ATTENTION Research & Development