表面改性的活性炭在合成乙二醇反应中的应用研究
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摘要
本论文首次在环氧乙烷水合反应中,引入表面改性的活性
    炭作为多相催化剂,并对经磺化改性的石油焦活性炭在反应中
    的催化性能进行了系统的研究。
     结果表明,磺化石油焦活性炭对环氧乙烷水合反应有很高
    的活性和乙二醇选择性。其活性大小依次为:25℃磺化的石油
    焦活性炭≈50℃磺化的石油焦活性炭>100℃磺化的石油焦活性
    炭>150℃磺化的石油焦活性炭>200℃磺化的石油焦活性炭>
    230℃磺化的石油焦活性炭,因此磺化温度对石油焦活性炭的活
    性有一定的影响,低温磺化比高温磺化的效果好;并且随着磺
    化温度的上升,石油焦活性炭的酸中心数逐渐增多,而活性却
    逐渐减弱,说明环氧乙烷水合反应只适于弱酸催化;反应温度
    对石油焦活性炭的性能影响最大,随着反应温度的升高,催化
    剂活性是快速增强的,但超过一定温度范围后,活性还有所减
    弱;石油焦活性炭的活性还随反应压力的增大而加强,压力超
    过一定值时,乙二醇的选择性会降低;空速的增加也会引起石
    油焦活性炭的活性减弱。
     实验中也对木质活性炭进行了考查,发现其对环氧乙烷水
    合反应也有很好的活性,有待进一步的研究。
Applied Study on the Superficial Transformation of Active
    
     Carbon in the Hydration of Ethylene Oxide to Ethylene Glycol
    
    
     ABSTRACT
    
     In this paper , the superficial transformation of active
     carbon , the sulfonated petroleum coke is firstly used to synthesize
     ethylene glycol (EG) by hydration of ethylene oxide (EO) , and the
     catalysis of sulfonated petroleum coke (SPC) is studied.
    
     The results indicate that SPE has high activity and good
     selectivity of EG in hydration reaction of EO . And sulfonation
     temperature has a certain effect on the activity of SPC , the higher
     the temperature , the feebler the activity , thus when petroleum
     coke is sulfonated in low temperature , its activity will be better
     than in high temperature ; Moreover, alone with the sulfonation
     temperature ascending , the number of acid-site of SPC gradually
     increase , but the activity wears off, it also shows that weak acid
     catalyst is more sutible for hydration reaction of EO ; In addition,
     the effect of reactive temperature on the activity of SPC is greatest,
     when reactive temperature going up , the activity of SPC is
     speedily enhanced , but when temperature exceeds a certain range,
     the activity of SPC will reduce ; And the activity of SPC will
     become stronger alone with reactive pressure rising , but when
     pressure exceeds a certain value , selectivity of EG will decrease
     Also , increasing airspeed will weaken the activity of SPC.
    
    
    
    
    
    
    
    
    
     Abstract
    
    
     At the same time , through investigating the catalysis of
     woodiness active carbon , the results show that it also has good
     activity in the hydration reaction of EO to EG , but that awaits for
     further studying.
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