We have studied the unimolecular decomposition of the petroleum relevant molecules; diethyl sulfide, dimethyl disulfide and thiophene We have established direct evidence rather than indirect evidence of radical intermediates formed during thermal decomposition. The initial steps of decomposition are crucial in interpreting the subsequent reaction steps that follow. All experiments involved using a 1 mm × 3 cm pulsed silicon carbide microtubular reactor configured to matrix isolation infrared absorption and vacuum ultraviolet photoionization mass spectroscopies These techniques both allow for thermal tuneablity (298 K - 1700 K) and sensitive detection of intermediate species such as radicals. The sulfur species were also investigated theoretically using density function and ab initio quantum chemical techniques.

Thermal decomposition of sulfur species

2019 Spring National Meeting

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