278203 Measuring Trace Components in Syngas Using Gas Chromatography and Ion Chromatography
Measuring Trace Components in Syngas using Gas Chromatography and Ion Chromatography
Patrick A Johnston1, Patrick Woolcock1, Karl Broer1 and Robert C. Brown1,2
1Center for Sustainable Environmental Technologies
2Department of Mechanical Engineering
Iowa State University
Ames, Iowa, 50011
Specific nitrogen and sulfur containing compounds are unfavorable in upgrading syngas to hydrocarbon based fuels. These compounds are known to poison catalysts at concentrations of sub part-per-million levels in syngas. It is critical to remove and quantify these compounds to provide an efficient and cost effective approach for Fischer-Tropsch synthesis.
The analytical techniques in this study will focus on off-line and on-line gas measurements that were analyzed from a 20kg/hr fluidized bed biomass gasifier with a unique gas cleaning system. Minor constituents of raw and clean biomass gasification syngas were analyzed on-line using a custom designed dual Gas Chromatography (GC) system before and after the cleaning stages. Trace concentrations of hydrogen sulfide, carbonyl sulfide, carbon disulfide, and ammonia were determined with a limit of quantification (LOQ) level of parts-per-billion (ppb) with sulfur and nitrogen chemiluminescence detectors (SCD/NCD).
Hydrogen cyanide concentrations were determined using Ion Chromatography with pulsed amperometric detection (PAD) using a silver working electrode. These samples will be captured in an impinger train using a basic aqueous solution and quantified off-line.
See more of this Group/Topical: 2012 International Congress on Energy (ICE)