Continuous monitoring of ultratrace products of incomplete combustion during incineration with a novel mobile jet-REMPI device

Abstract Jet-REMPI is our modification of the well-known REMPI mass spectrometry. This modification allows for a significant sensitivity improvement over more conventional designs without loosing the high selectivity which is normally found with REMPI. The improved sensitivity should enable on-line measurements in incineration. In order to test this we rebuilt our laboratory version of Jet-REMPI into a mobile apparatus which was tested in our own laboratory and in an EPA laboratory for dioxin measurements. In addition, it was field-tested at Research Center Karlsruhe. We got very good results. Examples are our detection limits around 1 ppt for benzene and around 10 ppt for 2,7 Cl 2 DD. In this paper the idea of Jet-REMPI is briefly outlined. The design of the new apparatus is displayed along with some of the test results. The discussion deals with the potential and the limitations of the improved method.

[1]  Christoffer Rappe,et al.  Influence of combustion parameters on the formation of polychlorinated dibenzo-p-dioxins, dibenzofurans, benzenes, and biphenyls and polyaromatic hydrocarbons in a pilot incinerator , 1993 .

[2]  H. Grotheer,et al.  Jet REMPI for the detection of trace gas compounds in complex gas mixtures : a tool for kinetic research and incinerator process control , 1996 .

[3]  T. Cool,et al.  Surrogate detection for continuous emission monitoring by resonance ionization , 1994 .

[4]  U. Boesl,et al.  Two-Photon Ionization of Polyatomic Molecules in a Mass Spectrometer , 1978 .

[5]  R. P. Wilson,et al.  The combustion institute: Western States Section—1974 Spring Meeting , 1974 .

[6]  D. Lubman,et al.  Resonant two-photon ionization spectroscopy in supersonic beams for discrimination of disubstituted benzenes in mass spectrometry , 1984 .

[7]  Roland Walter,et al.  Jet-REMPI for process control in incineration , 1997, Other Conferences.

[8]  D. Lenoir,et al.  Estimating concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans in the stack gas of a hazardous waste incinerator from concentrations of chlorinated benzenes and biphenyls , 1994 .

[9]  Harald Oser,et al.  Low-noise ion source for the implementation of Jet-REMPI: novel on-line monitor for process control , 1995, Other Conferences.

[10]  K. Ballschmiter,et al.  Reaction pathways for the formation of polychloro-dibenzodioxins (PCDD) and —dibenzofurans (PCDF) in combustion processes: II. Chlorobenzenes and chlorophenols as precursors in the formation of polychloro-dibenzodioxins and —dibenzofurans in flame chemistry , 1988 .

[11]  D. Lubman,et al.  Applicability of resonant two-photon ionization in supersonic beam mass spectrometry to halogenated aromatic hydrocarbons , 1985 .

[12]  H. J. Heger,et al.  A Mobile Resonance‐enhanced Multiphoton Ionization Time‐of‐flight Mass Spectrometry Device for On‐line Analysis of Aromatic Pollutants in Waste Incinerator Flue Gases: First Results , 1997 .

[13]  K. Schramm,et al.  Laser mass spectrometry of the Di‐, Tri‐ and tetrachlorobenzenes: Isomer‐selective ionization and detection , 1994 .

[14]  D. Lenoir,et al.  THE IONIZATION ENERGIES OF POLYCHLORINATED DIBENZO-P-DIOXINS: NEW EXPERIMENTAL RESULTS AND THEORETICAL STUDIES , 1995 .

[15]  T. Cool,et al.  Detection of Toxic Emissions from Incinerators , 1993 .

[16]  E. Rohlfing.  Resonantly enhanced multiphoton ionization for the trace detection of chlorinated aromatics , 1989 .

[17]  David M. Lubman,et al.  Lasers and Mass Spectrometry , 1990 .

[18]  V. Potapov,et al.  Stepwise laser photoionization of molecules in a mass spectrometer: a new method for probing and detection of polyatomic molecules. , 1978, Optics letters.

[19]  D. Lenoir,et al.  On-line emission control of combustion processes by laser-induced resonance-enhanced multi-photon ionization/mass spectrometry , 1996 .

[20]  B. A. Williams,et al.  Resonance ionization detection limits for hazardous emissions , 1992 .