萘及蒽的气体可在氮气或氢气(略含水份以免碳沉积出来)中,经一个大气压和三个小时的反应生成乙炔和乙烯。萘在氮气中的热解作用于900℃开始,全部碳元素中有4～5%生成乙烷,但它在1000℃时几乎全部破坏;在1300℃时甲烷增至1%,同时乙炔及乙烯各为2.5%,且增加很快。在氢气中,碳的沉积可减慢,但在 The naphthalene and anthracene gases can be converted to acetylene and ethylene by one atmosphere and three hours of reaction in nitrogen or hydrogen (slightly hydrated to avoid carbon deposition). The pyrolysis of naphthalene in nitrogen started at 900 ° C and 4 to 5% of all carbon produced ethane, but almost completely destroyed at 1000 ° C. The methane was increased to 1% at 1300 ° C while acetylene and ethylene Each 2.5%, and increase quickly. In hydrogen, the deposition of carbon can slow, but at