The first thing that comes to mind is the decomposition and hydrolysis reactions because it is typically endothermic. Thermal decomposition of an ethylmercaptan occurs at temperature of 230-530 ºC. More accurate information can be found.
I am developing a product that requires the detection of LPG at room temperature. As this reactions are at high temperature it might not work. If you can help it would be very helpful.
Aditya, there are a decomposition way of ethylmercaptan at 40 degrees in presence a catalyst, for example, cobalt sulfid on silicagel. You can look patents.