Ethane was cracked in a copper-lined, alloy steel tube at temperatures in the range 1700°to 1900°F. Hydrogen and ethylene were the principal products, under the experimental conditions, but acetylene and butadiene were also formed in appreciable amounts.The concentration of ethylene in the cracked gas increased with increased ethane cracking to a maximum value of 37% at 1800 ^F. and 83% destruction of ethane. INDUSTRIAL AND ENGINEERING CHEMISTRY Vol. 41, No. 11Table I. Ethane Pyrolysis" Run No.