Process Gas Chromatography

Annino. R., and R. Villalobos Process Gas Chromatography, ISA. Research Triangle Park, NC, 1992. 

Delaney, T. M., Mills, P. L. Multidimensional process gas chromatography based on a single GC with dual ovens . Presented at 38th Annual Eastern Analytical Symposium, Somerset, N),... 

LINEARITY AND RELIABILITY DETERMINATION OF BTU ANALYSIS BY PROCESS GAS CHROMATOGRAPHY... 

The use of process gas chromatography was also once envisaged, but it proved totally unfeasible for control applications, because roughly 15 minutes were needed to complete a measurement, even with highspeed models. Thus a highly reproducible, highly sensitive, and rapidly responsive method of continuous calorific value measurement was sought. 

Gas chromatography has become the one of the most widely used techniques in PAG for the analysis of volatiles. The applications in which it has been used include the determination of octane number in fuels using -alkanes as reference peaks and to control the hydrogen/nitrogen ratio in ammonia production. A disadvantage of process gas chromatography is that there is a delay as the sample passes through the column before the results are known. 

In most cases, process chromatography is done in the gas phase. Many improvements have been made to liquid chromatographic systems that make them suitable for process use, but this article will focus only on process gas chromatography (PGC). 

Annino R and Villalobos R (1992) Process gas chromatography - Fundamentals and Applications. Research Triangle Park, NC Instrument Society of America. 

Interest in process high-performance liquid chromatography has only developed in recent years, but is gaining use in food and pharmaceutical industry. However, the resolution of problems associated with sampling, maintenance of column condition, and reliability are more difficult to accomplish than for process gas chromatography. 

R. ViUalobos and R. Annino, Process Gas Chromatography, Instrument Society of America (1992). 

Figure 17 Concentration of MeHSiCl2 and MesSiCl during a recycle period as measured using the on-line process Raman analyzer and a process gas chromatography (GC) analyzer.

Table 7.32. Main characteristics of conventional process gas chromatography...

The role of laboratory GC will decrease in favour of on-line GC. Self diagnostic fault finding and advanced calibration/validation will develop and more extensive use of multidimensional and hyphenated systems will be made. Microtechnology in process gas chromatography was recently illustrated [263]. Table 7.33 summarises the vision for PGC 2000+. 

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