資源描述：
《催化裂化干氣與苯烷基化催化蒸餾制乙苯反應(yīng)網(wǎng)絡(luò)熱力學(xué)研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、維普資訊http://www.cqvip.com第24卷第1期催化學(xué)報(bào)2003年1月Vo1．24No．1ChineseJournalofCatalysisJanuary2003文章編號(hào)：0253—9837(2003)01—0073—06研究論文：73～78催化裂化干氣與苯烷基化催化蒸餾制乙苯反應(yīng)網(wǎng)絡(luò)熱力學(xué)研究徐龍伢，王清遐，劉偉成。，謝素娟，孫新德，白杰，張淑蓉，王昌東(1中國(guó)科學(xué)院大連化學(xué)物理研究所，遼寧大連116023；2中國(guó)石油天然氣股份有限公司撫順石化公司，遼寧撫順113004)摘要：高溫氣相反應(yīng)條件下的催化裂化干氣制乙苯過程中，容易生成甲苯和二甲苯等
2、副產(chǎn)物；在該過程中采用催化蒸餾技術(shù)，使苯與乙烯在低溫條件下進(jìn)行反應(yīng)，可大幅度降低產(chǎn)品中二甲苯的含量．通過對(duì)催化裂化干氣與苯烷基化催化精餾過程中的各反應(yīng)步驟進(jìn)行分析與熱力學(xué)計(jì)算，結(jié)合反應(yīng)的實(shí)際產(chǎn)物組成，提出了苯與乙烯烷基化的反應(yīng)網(wǎng)絡(luò)，探討了苯與乙烯烷基化反應(yīng)過程中甲苯和二甲苯的形成機(jī)理及影響因素．結(jié)果表明，增大苯／乙烯比對(duì)提高乙烯平衡轉(zhuǎn)化率及乙苯收率有利；在較低溫度下進(jìn)行烷基化反應(yīng)，可大大減緩C-C鍵裂解速度，抑制甲苯和二甲苯生成，提高乙苯產(chǎn)品質(zhì)量．關(guān)鍵詞：苯，乙烯，烷基化，蒸餾，乙苯，甲苯，二甲苯，熱力學(xué)中圖分類號(hào)：0643文獻(xiàn)標(biāo)識(shí)碼：AThermodynam
3、icsofEthylbenzeneSynthesisthroughAlkylationofFCCOff-GaswithBenzenebyCatalyticDistillationxuLongya，WANGQingxia，LIUWeicheng，XIESujuan，SUNXinde，BAIJie，ZHANGShurong，WANGChangdong(1DalinIn5tit“ofChPmicalPhysics，ThPChieseAcademyofSciences，Dalin116023，Lonig，Chin；2FushunPetrochemicalCorpora
4、tionofPetroChinaCompanyLtd，F(xiàn)ushun113004，Liaoning，China)Abstract：AcatalyticdistillationtechniqueforsynthesisofPhEtthroughalkylationofFCCoff—gaswithC6H6wasdeveloped．C6I-I6couldreactwithC2H4atamuchlowertemperature，beingfavorabletoPhEtselectivityandprohibitingC6H4Me2production．Theresult
5、softhecalculatedequilibriumconstantsshowthatitismorefavor—abletoproducePhMeandC6H4Me2thanPhEtandC6H4Et2，comparedwiththealkylationofC6H6withC2H4underliquid—phasecondition，andtheequilibriumconstantforPhMeorC6H4Me2is100timesashighasthatforPhEtorC6H4Et2inthereactionofC6H6withC2H4．Inorde
6、rtoprohibittheformationofPhMeandC6．H4Me2fromthepointofdynamics，itisveryimportanttodevelopcatalystswithhighselectivityforPhEtandC6H4Et2．Byanalyzingthecomplicatedreactionprocess，anewdynamicsnetworkforalkylationofC6H6withC2H4，aswellasthatfortransalkylationofC6H6withdiethylbenzene，hasbe
7、enproposedaccordingtothedetailedthermo—dynamicscalculationandthefactualproductdistribution．Theeffectsofdifferentreactionconditionsonproductdistributionarealsodiscussed．Lowtemperature，highC686／C2H4molarratioandappropriatepressurearesuit—ablefortheincreaseofC2H4conversionandPhEtselect
8、ivity．Theformationm
