Chemical Processes & Instrument Development: Instruments

Relative Rate Reactor (RR)

RR instrument
Relative Rate Reactor setup

Schematic of a relative rate apparatus using a 351 nm excimer photolysis laser

Principle of the Measurement

The loss of the compound of interest is measured relative to that of a compound with a well established reaction rate coefficient.


Temperature and pressure dependent reaction rate coefficients (OH, Cl, O3, and NO3), reaction mechanisms, reaction product yields


Jim Burkholder

Key Publications

Baasandorj, M., V.C. Papadimitriou, and J.B. Burkholder, Rate coefficients for the gas-phase reaction of (E)– and (Z)–CF3CF=CFCF3 with the OH radical and Cl-atom, Journal of Physical Chemistry A, doi:10.1021/acs.jpca.9b03095, 2019.

Papadimitriou, V.C., and J.B. Burkholder, OH radical reaction rate coefficients, infrared spectrum, and global warming potential of (E)-(CF3)2CFCH=CHF (HFO-1438ezy(E)), Journal of Physical Chemistry, doi:10.1021/acs.jpca.6b06096, 2016.

Baasandorj, M., B.D. Hall, and J.B. Burkholder, Rate coefficients for the reaction of O(1D) with the atmospherically long-lived greenhouse gases NF3, SF5CF3, CHF3, C2F6, c-C4F8, n-C5F12, and n-C6F14, Atmospheric Chemistry and Physics, doi:10.5194/acp-12-11753-2012, 2012.