I know they add a thiol (sulfur compound that smells like rotten eggs) to the city mains for cooking/heating gas. Would be interesting to know if its commonly

I know they add a thiol (sulfur compound that smells like rotten eggs) to the city mains for cooking/heating gas. Would be interesting to know if its commonly added to industrial LNG. Because we burn a lot of that - even if you only add a few ppm thiol to natural gas, that's a whole lot of sulfur being burnt...