文章摘要
活性焦基固体酸的制备及其催化酯化性能
Preparation of Active Semi-Coke Solid Acid and its Catalytic Esterification Properties
投稿时间:2019-05-06  修订日期:2019-06-10
DOI:
中文关键词: 共热解半焦  活化  固体酸  酯化  催化性能
英文关键词: co-pyrolysis semi-coke  activation  solid acid  esterification  catalytic performances
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
李昊 武汉科技大学 lh462964801@163.com 
何选明 武汉科技大学 xmingh999@126.com 
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中文摘要:
      以新疆淖毛湖提质长焰煤与废旧橡胶粉共热解半焦为炭源,经过磷酸-水热耦合活化、磺化两步处理后,制备了固体酸催化剂。以乙醇乙酸酯化反应中乙酸的转化率为催化性能指标,探究了活化条件、磺化条件对所制固体酸催化性能的影响。试验结果表明,对经过磷酸质量分数48.73%、活化温度448K、活化时间3h条件下活化得到的活性焦,在磺化温度423K、磺化时间 1小时条件磺化处理得到固体酸催化剂,其酸量达7.2mmol/g,其中—SO3H为1.30mmol/g;在固体酸催化剂质量分数为9.5%,乙醇乙酸体积比2:1,反应时间30min,乙酸转化率达81.98%,反复使用5次,仍能保持较高催化活性。
英文摘要:
      The solid acid catalyst was prepared by co-pyrolysis semi-coke with waste rubber powder and long-flame coal in Naomaohu , Xinjiang after two steps of phosphoric acid-hydrothermal coupling activation and sulfonation treatment. The conversion rate of acetic acid in the ethanol acetate esterification reaction was used as the catalytic performance index, and the effects of activation conditions and sulfonation conditions on the catalytic performance of the solid acid prepared were investigated. The results showed that the activated semi-coke obtained by activation of phosphoric acid mass fraction of 48.73%, activation temperature of 448K and activation time of 3h was sulfonated at sulfonation temperature of 423K and sulfonation time of 1 hour to obtain a solid acid catalyst. The acid amount of the solid acid catalyst is 7.2 mmol/g, wherein —SO3H is 1.30 mmol/g;The solid acid catalyst mass fraction was 9.5%, the volume ratio of ethanol to glacial acetic acid was 2:1, the reaction time was 30min, the conversion rate of glacial acetic acid was up to 81.98%.
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