Offgas analysis

The extracts were then atomised and fed into the ROTARC reactor for high temperature treatment. In the first case the atomised extract was mixed with the torch gas (Argon) only. It was a pure pyrolysis, which was effective in the sooting of the reactor walls and it was making the scrubber fluid dirty. The disadvantage of the pure pyrolysis process confirmed our theoretical considerations on thermal destruction of PCB s presented in [9]. To avoid sooting, we fed steam into the reaction chamber in the amount of 10% above the stoichiometry. In this case, which we call the wet pyrolysis , we obtained the destruction efficiency of oil- PCB s at least 99.99%. The offgas analysis on the concentration of oil-PCB s were below the detection limit 0.2 ppm. 

As mass spectrometers are relatively expensive, the exhaust gas of three or more bioreactors is typically directed to a single analyzer. This is possible because the offgas analysis is done outside the bioreactors themselves. However, the multiplexing of the streams results in added complexity with regard to sample handling and routing, particularly if concerns of cross contamination need be addressed. The contamination issue is usually handled by placing ultrafilters in the exhaust lines. Care, however, must be taken to... 

In both the 2 kW and 12 kW systems, the oveaall instantaneous destruction rate was calculated from the volumetric flow rate and the measured composition of (he anolyte offgas. Analysis of the anolyte off-gas by continuous emission monitors provided the composition (volume percent, equivalent to mole percent) of the gas. The volumettic flow, corrected for ambient temperature and pressure, provided the total molar flow rate. 

A DRE for organics in offgas of 99.99 percent and a risk-based, site-specific analysis. 

The most reliable method of detecting a runaway is online analysis of a product formed in the runaway reaction. For example, CO2 can be monitored in the offgas during the runaway-sensitive synthesis of ethylene oxide. If its concentration increases above a specified limit, the reactor must be shut down, purged with nitrogen, and for a certain period cooled to a lower temperature before operation is recommenced. 

Oil Shale Retort Offgases. Analysis of the retort offgas for organic constituents before the offgas burner showed mostly hydrocarbons. Saturated hydrocarbons, alkenes, alkynes, cyclic alkanes, and cychc alkenes were found. Aromatic compounds, mostly alkyl-substituted benzenes, were detected. No heterocyclics were identified in the offgas. 

Recommcndation 4-1. To avoid the possibility of unanticipated disposal problems, the PMACWA and the BGCAPP contractor should characterize and consider waste management options for reverse osmosis rejectate brine, supercritical water oxidation (SCWO) filtrate solid waste, SCWO titanium tank liners, venturi scrubber particulate filters, and energetics offgas treatment system filters before submitting the waste analysis plan required by RCRA. The PMACWA should also look carefully for any as-yet-unidentified secondary waste streams from BGCAPP or PCAPP. 

---