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1.太原理工大学 化学工程与技术学院,山西 太原 030024
2.太原理工大学 省部共建煤基能源清洁高效利用国家重点实验室,山西 太原 030024
吴志鹏(1997—),硕士研究生,研究方向为钙基催化剂,E-mail:2657099471@qq.com。
闫晓亮(1985—),博士,教授,研究方向为多相催化剂,E-mail:yanxiaoliang@tyut.edu.cn。
收稿日期:2024-05-21,
修回日期:2024-06-03,
纸质出版日期:2025-04-25
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吴志鹏,李宇斌,刘相洋等.xZnO-CaO催化乙酸甲酯和丙二醇甲醚合成丙二醇甲醚醋酸酯[J].低碳化学与化工,2025,50(04):55-63.
WU Zhipeng,LI Yubin,LIU Xiangyang,et al.Synthesis of propylene glycol methyl ether acetate from methyl acetate and propylene glycol methyl ether catalyzed by xZnO-CaO[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):55-63.
吴志鹏,李宇斌,刘相洋等.xZnO-CaO催化乙酸甲酯和丙二醇甲醚合成丙二醇甲醚醋酸酯[J].低碳化学与化工,2025,50(04):55-63. DOI: 10.12434/j.issn.2097-2547.20240222.
WU Zhipeng,LI Yubin,LIU Xiangyang,et al.Synthesis of propylene glycol methyl ether acetate from methyl acetate and propylene glycol methyl ether catalyzed by xZnO-CaO[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(04):55-63. DOI: 10.12434/j.issn.2097-2547.20240222.
调控碱性强度是提高CaO基催化剂酯交换反应催化性能的重要方法之一。采用等体积浸渍法制备了不同ZnO质量分数的ZnO-CaO催化剂(
x
ZnO-CaO),并应用于乙酸甲酯与丙二醇甲醚酯交换反应。通过XRD和SEM等表征了
x
ZnO-CaO的物相组成和微观形貌等,利用CO
2
-TPD研究了ZnO质量分数对
x
ZnO-CaO碱性强度的影响,采用单因素分析法优化了酯交换反应条件。结果表明,ZnO质量分数为5%的ZnO-CaO催化剂(5ZnO-CaO)具有适宜的碱性强度并表现出较好的催化性能,在
V
(乙酸甲酯)/
V
(丙二醇甲醚)为10、反应温度为160 ℃和催化剂用量为0.100 g的条件下反应2 h,其丙二醇甲醚转化率和丙二醇甲醚醋酸酯选择性分别为70.0%和大于98.0%。活性相CaO转化为非活性相Ca(AC)
2
或Ca(AC)
2
·0.5H
2
O是导致催化剂失活的主要原因。失活5ZnO-CaO可通过焙烧获得再生,再生5ZnO-CaO在前述反应条件下的丙二醇甲醚转化率为69.5%。
Adjusting alkaline strength is one
of the important methods to improve the transesterification catalytic performances of CaO-based catalysts. ZnO-CaO catalysts with different ZnO mass fractions (
x
ZnO-CaO) were prepared by equal volume impregnation method and applied to transesterification of methyl acetate and propylene glycol methyl ether. The phase compositions and micro-morphologies of
x
ZnO-CaO were characterized by XRD and SEM
etc
. The effects of ZnO mass fractions on
x
ZnO-CaO’s alkaline strengths were studied by CO
2
-TPD. The transesterification conditions were optimized by single factor analysis method. The results show that the ZnO-CaO catalyst with ZnO mass fraction of 5% (5ZnO-CaO) has suitable alkaline strength and good catalytic performance. Under the conditions of
V
(methyl acetate)/
V
(propylene glycol methyl ether) of 10
reaction temperature of 160 °C
catalyst dosage of 0.100 g and reaction time of 2 h
the propylene glycol methyl ether conversion rate and propylene glycol methyl ether acetate selectivity of 5ZnO-CaO are 70.0% and greater than 98.0%
respectively. The conversion of active phase CaO to inactive phase Ca(AC)
2
or Ca(AC)
2
·0.5H
2
O is the main cause of catalyst deactivation. The deactivated 5ZnO-CaO can be regenerated by roasting
and propylene glycol methyl ether conversion rate of the regenerated 5ZnO-CaO is 69.5% under the above-mentioned reaction conditions.
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