文章摘要
谭旭,陈晓蓉,朱明,於德伟,许岩,梅华.Mn含量对Cu-Mn-Al催化丙二醇单甲醚脱氢的影响[J].精细化工,2018,35(12):
Mn含量对Cu-Mn-Al催化丙二醇单甲醚脱氢的影响
Effect of Mn Content on 1-Methoxy-2-propanol Dehydrogenation over Cu-Mn-Al Catalysts
投稿时间:2018-03-07  修订日期:2018-05-28
DOI:
中文关键词: 丙二醇单甲醚  脱氢  甲氧基丙酮  Cu-Mn-Al  酸性
英文关键词: 1-Methoxy-2-propanol  dehydrogenation  methoxyacetone  Cu-Mn-Al  acidity
基金项目:
作者单位E-mail
谭旭 南京工业大学 419026934@qq.com 
陈晓蓉 南京工业大学  
朱明 南京工业大学  
於德伟 南京(诺盟化工)催化氢化工程技术研究中心  
许岩 南京工业大学  
梅华 南京工业大学 meihua@njtech.edu.cn 
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中文摘要:
      以硝酸铜、硝酸锰、硝酸铝和碳酸钠为原料,通过共沉淀法制备了不同Mn含量的Cu-Mn-Al催化剂,采用BET,XRD,SEM,TEM,H2-TPR和NH3-TPD等对催化剂进行了表征,在固定床反应器上考察了催化剂对丙二醇单甲醚直接脱氢制备甲氧基丙酮反应活性的影响。结果表明:Mn含量对Cu-Mn-Al催化剂理化性质有较大影响。适量添加Mn能够促进Cu的分散,改变催化剂还原性能,降低催化剂表面酸性。当n(Cu):n(Mn):n(Al)=2.0:3.5:1.0时,Cu-Mn-Al催化剂表面酸量低,具有较低还原温度。在反应温度260 ℃,常压,进料组成为含5%(质量分数)水的丙二醇单甲醚溶液,液时空速为2.5 h-1的条件下,该催化剂上丙二醇单甲醚转化率可达61.57%,甲氧基丙酮选择性可达96.83%,且副产物丙酮选择性低,为1.20%。
英文摘要:
      A series of Cu-Mn-Al catalysts with different Mn content were synthesized by co-precipitation method using Cu(NO3)2, Mn(NO3)2, Al(NO3)3 and Na2CO3 as raw material. The samples were characterized by BET, XRD, SEM, TEM, H2-TPR and NH3-TPD. The catalytic activity was tested by 1-methoxy-2-propanol dehydrogenation to methoxyacetone in a fixed bed reactor. The results showed that Mn content had great effect on the pyhsico-chemical properties of Cu-Mn-Al catalysts. The addition of appropriate Mn promoted the dispersion of Cu, changed the reducibility and reduced surface acidity. When n(Cu):n(Mn):n(Al)=2.0:3.5:1.0, the surface acidity of Cu-Mn-Al catalyst was the lowest and Cu-Mn-Al catalyst had lower reduction temperature. Under the reaction conditions of reaction temperature 260 ℃, reaction pressure 1atm, 1-methoxy-2-propanol feed with 5% mass fractions of water and liquid hourly space velocity 2.5 h-1, the conversion of 1-methoxy-2-propanol was 61.57%, the selectivity of methoxyacetone was 96.83%, and the selectivity of main byproduct acetone was 1.20%.
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