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OALib Journal期刊
ISSN: 2333-9721
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y分子筛催化2,3-丁二醇脱水响应面优化
DOI: 10.3969/j.issn.1671-7627.2014.01.008, PP. 39-46
Keywords: 2,3-丁二醇,脱水,丁酮,响应面,y分子筛
Abstract:
利用y分子筛催化生物2,3-丁二醇(bdo)脱水制丁酮(mek),为丁酮的绿色生产提供了替代工艺。利用designexpert软件优化了nay分子筛上脱水反应参数如bdo质量分数、温度、n2及液体流速等,并考察了优化条件下hy、nay的反应性能。结合热力学分析及nh3-tpd表征揭示了温度、酸特性对反应性能的影响。结果显示:温度对活性影响最为显著,473.15k下,hy上bdo转化率为97.4%,mek选择性可达73.6%,但nay则无活性。hy同等条件下亦呈现高于nay的异丁醛选择性。酸分析表明该差异归结于hy表面较多强酸及中强酸量。
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