Catalytic pyrolysis characteristics of simulated seawater in lean coal

Intheunderground catalytic gasification processof lean coal,the solid catalyst cannot be usedandrecovered,soitisnecessarytodevelopaninexpensiveliquidcatalyst.Inordertoexplorethe feasibilityofseawaterasacheapgasificationagentforundergroundcoalgasification,andtounderstand thecatalyticeffectofNaClcomponentoncoalpyrolysisandgasification,thispaperselectstheblocksize with3%NaClsolution(simulatedseawater)ascatalyst.TheleancoalofWangxieCoalMineofabout 6cmwassubjectedtopyrolysistest.Theheatingrateinsideandoutsideofthecoalblockandthecompositionofthepyrolysisproducttarweremeasured.Theinfluenceofthecatalystonthesemi-cokestructurewasstudied.Theresultsshowthatthetemperaturetransferintheprocessofpyrolysisofmassive leancoalhashysteresis.Theactivationenergyoflarge-scalecoalwithadditionofNaClcatalystinthetemperaturerangeof350℃~650℃isreducedby39%and45%,respectively,comparedwiththeraw coal;catalyticpyrolysisThebenzenecontentintarincreasedby7.8%,thehydrocarboncontentofcoal sampleⅠdecreasedby14.9%,coalsampleⅡdecreasedby32.4%;thespecificsurfaceareaofcatalyticpyrolysiscoalcharwassignificantlylargerthanthatofnon-catalyzedpyrolysis;Thecontentof—OH bondand* *C* *OhealthcoalⅡcoke