Rate Constant Measurement of the Recombination Reaction C3H3 + C3H3

TRRP Training: 2022 Program

presented by: GSI Environmetal Inc.

Texas Risk Reduction Program regulations (TRRP; 30 TAC 350) establish consistent risk-based protocols for assessment and response to soil, groundwater, or surface water impacts associated with environmental releases of regulated wastes or substances.

Presented by GSI Environmental Inc., this popular and informative training series is a must for professionals who need a working understanding of TRRP and those needing to stay up-to-date with the latest TCEQ TRRP guidance and policies.

TRRP Training Course (2 Days): Provides an overview of the TRRP framework and step-by-step training on property assessment and response action procedures established under the TRRP rule

Attendees will become acquainted with rules, key guidance and policies covering affected property assessments, protective concentration levels, and response actions. The course material presents strategies for efficient project management in compliance with TRRP and explains the various report forms adopted by TCEQ.

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Dates and Location

Dates

June 14th and 15th, 2022

Location

Crowne Plaza River Oaks 2712 SW Freeway Houston, Texas 77098 713.523.8448 http://www.crowneplaza.com/

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Authors:C. L. Morter, Shahla K. Farhat, J. D. Adamson, G. P. Glass, R. F. Curl

Published: July 2020 in Groundwater Monitoring and Remediation.
Abstract
Using the technique of infrared kinetic absorption spectroscopy, the second-order rate constant for the recombination reaction of the propargyl radical (C3H3 + C3H3) has been measured and found to have the value (1.2 ± 0.2) X 10-10 cm3 molecule-1 s-1 at 295 K. The radical was produced in a flow cell by excimer laser flash photolysis (λ = 193 nm) of the precursors C3H3 or C3H3Br and detected using time-resolved IR absorption. Absolute concentrations of C3H3 were determined by comparing the C3H3 absorption intensity with that of the Br atom. This calibration scheme was checked by producing methyl radicals by photolysis of methyl bromide and comparing the rate constant for methyl recombination thus obtained with literature values. The quantum yield for HCI production from the photodissociation of C3H3Cl at 193 nm was determined to be 0.07 ± 0.01.