負(fù)載型金屬氧化物催化劑對甲苯甲烷交叉氧化偶聯(lián)反應(yīng)的研究.pdf

1、湖南大學(xué)碩士學(xué)位論文負(fù)載型金屬氧化物催化劑對甲苯甲烷交叉氧化偶聯(lián)反應(yīng)的研究姓名：陳麗娟申請學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：蔡炳新2001.3.1塑墮盔堂些蘭些三蘭墮堡主蘭堡堡奎一——一ABSTRACTYThecatalystsusedforoxidativecouplingofmethane，MgO、A1203、CaO、Ti02forexample，wereemployedforoxidativecrosscouplingofme

2、thanewithtoluene，thecomparativeperformancewereobservedinthispaper，Li／MgOwereusedasatypicalcatalysttoanalysistheeffectofLicontent，reactiontemperature，compositionoffeedgases，andgas—stateoxygenonoxidativecrosscouplingofmeth

3、anewithtolueneTheresultsdicatedthattheactivesitesofthisreactiononLi／MgOcatalystwereLi0一，similartothatofoxidativecouplingofmethaneonthecatalyst，onLi／MgOwithlowLiloading，theselectivityandyieldofC8werelowLi0一siteandsuitable

4、LacidpointswerethesitesofadsorptionofreactantTheactivityofMgO、A120，、CaO、Ti02withhigherLiloadingwerecomparedwithoneanotherOnpureMgOandA1203catalyst，noperformanceandproductionofC8weredetectedWhileonpureCaOandTi02catalysts，

5、C8wereproducedbuttheselectivityofC8wereverylowwhenpromotedbyalkalimetal(Li、Na)compounds，theselectivityofC8increaseddrasticallyonallthedopedcatalystsOnthecatalystswithsarfleLiloadingtheactivityincreasedaccordingtOtheorder

6、asfollows：CaOTi02MgOA1203IntheviewofcrystallicstructuretheradiusofMgionismoreneartoLiion，fascilatingLiincorporationintoMg—OcrystallatticeWhilefromtheconsiderationofvalueballanceMgionof2valuematchLiionbetterthanAIionof3va