SnO2-Pt/γ-Al2O3催化葡萄糖制备乳酸甲酯的研究

doi:10.3969/j.issn.0253-2417.2019.03.007

林产化学与工业 ›› 2019, Vol. 39 ›› Issue (3): 49-56.doi: 10.3969/j.issn.0253-2417.2019.03.007

SnO₂-Pt/γ-Al₂O₃催化葡萄糖制备乳酸甲酯的研究

王珍^1,²(),黄元波^1,²,郑云武^1,²,王继大^1,²,郑志锋^1,^3,*()

1. 林业生物质资源高效利用技术国家地方联合工程研究中心; 西南地区林业生物质资源高效利用国家林业和草原局重点实验室; 云南省生物质能源国际联合研究中心; 西南林业大学, 云南昆明 650224
2. 西南林业大学材料科学与工程学院, 云南昆明 650224
3. 厦门市农业生物质高值化技术重点实验室; 福建省生物质清洁高价值技术工程研究中心; 厦门大学能源学院, 福建厦门 361102

收稿日期:2019-02-01 出版日期:2019-06-28 发布日期:2019-06-26
通讯作者: 郑志锋 E-mail:wangzhen92517@163.com;zhifeng.zheng@xmu.edu.cn
作者简介:王珍(1992-),女,山西忻州人,硕士生,主要从事生物质催化热解制备化学品的研究工作; E-mail:wangzhen92517@163.com
基金资助:
国家自然科学基金资助项目(31670599);云南省可再生能源发展专项资金项目(云财产业[2015]86号);云南省教育厅研究生科技创新项目(2018Y130)

Preparation of Methyl Lactate from Glucose Using SnO₂-Pt/γ-Al₂O₃ Catalyst

Zhen WANG^1,²(),Yuanbo HUANG^1,²,Yunwu ZHENG^1,²,Jida WANG^1,²,Zhifeng ZHENG^1,^3,*()

1. National-Local Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forest Biomass Resources; Key Laboratory for Highly-Efficient Utilization of Forest Biomass Resources in the Southwest China, National Forestry and Grassland Administration; Yunnan Provincial International Joint Research Center for Bioenergy, Southwest Forestry University, Kunming 650224, China
2. School of Materials Science & Engineering, Southwest Forestry University, Kunming 650224, China
3. Xiamen Key Laboratory of High-valued Conversion Technology of Agricultural Biomass; Fujian Engineering and Research Center of Clean and High-valued Technologies for Biomass; College of Energy, Xiamen University, Xiamen 361102, China

Received:2019-02-01 Online:2019-06-28 Published:2019-06-26
Contact: Zhifeng ZHENG E-mail:wangzhen92517@163.com;zhifeng.zheng@xmu.edu.cn
Supported by:
国家自然科学基金资助项目(31670599);云南省可再生能源发展专项资金项目(云财产业[2015]86号);云南省教育厅研究生科技创新项目(2018Y130)

摘要/Abstract

摘要：

以γ-Al₂O₃为载体，采用浸渍法制备了SnO₂-Pt/γ-Al₂O₃催化剂，探讨工艺参数（反应温度、反应时间、催化剂用量）对葡萄糖催化转化制备乳酸甲酯的影响，并对催化剂的重复使用性能以及放大实验进行探索。同时采用扫描电子显微镜（SEM）、X光射线电子能谱（XPS）、X射线衍射（XRD）、氮气吸附-脱附、NH₃程序升温脱附（NH₃-TPD）等对SnO₂-Pt/γ-Al₂O₃催化剂进行了表征。结果表明：金属Pt和SnO₂均匀地分散到γ-Al₂O₃载体上，催化剂体系同时具有B酸和L酸的分布，比表面积为117.08 m²/g，孔容为0.23 cm³/g，平均孔径为6.54 nm，催化活性明显。当葡萄糖为1 g、催化剂用量（以葡萄糖质量计）为10%、葡萄糖与甲醇料液比为1:10（g:mL）、反应温度220℃、反应10 h的条件下，SnO₂-Pt/γ-Al₂O₃表现出较高催化活性，葡萄糖转化率为92.63%，乳酸甲酯选择性高达20.08%，且催化剂表现出良好的重复使用性能和放大稳定性，重复使用3次时，葡萄糖转化率仍达88.43%，乳酸甲酯选择性达19.27%；物料投加量放大10倍时，葡萄糖转化率仍达86.27%，乳酸甲酯选择性达18.71%。

关键词: 乳酸甲酯, SnO₂-Pt/γ-Al₂O₃, 载体, 葡萄糖, 甲醇

Abstract:

SnO₂-Pt/γ-Al₂O₃ catalysts were prepared by impregnation method using γ-Al₂O₃ as supporter. The effects of reaction parameters, including reaction temperature, reaction time and amount of catalyst, on the catalytic conversion of glucose to methyl lactate(MLA) were investigated. The reusability of the catalysts and the scale-up experiments were also explored. SnO₂-Pt/γ-Al₂O₃ catalysts were characterized by scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), X-ray diffraction(XRD), nitrogen adsorption-desorption, temperature programmed desorption(NH₃-TPD). The results showed that the metal Pt and SnO₂ were uniformly dispersed on the γ-Al₂O₃ supporter. The catalyst system had the distribution of B and L acid sites at the same time. The surface area was 117.08 m²/g, the pore volume was 0.23 cm³/g, and the average pore diameter was 6.54 nm. SnO₂-Pt/γ-Al₂O₃ exhibited high catalytic activity with the conversion of 92.63% for glucose and the selectivity of 20.08% for glucose 1 g, methyl lactate when the catalyst dosage 10%, the ratio of glucose to methanol 1:10(g:mL), the reaction temperature 220℃ and the reaction time 10 h. The catalyst exhibited good reusability and amplification stability. The conversion of glucose and selectivity of methyl lactate were 88.43% and 19.27% after reusing for three times, 86.27% and 18.71% respectively when the dosage of materials increased 10 times.

Key words: methyl lactate, SnO₂-Pt/γ-Al₂O₃, support, glucose, methanol

中图分类号:

TQ35

王珍,黄元波,郑云武,王继大,郑志锋. SnO₂-Pt/γ-Al₂O₃催化葡萄糖制备乳酸甲酯的研究[J]. 林产化学与工业, 2019, 39(3): 49-56.

Zhen WANG,Yuanbo HUANG,Yunwu ZHENG,Jida WANG,Zhifeng ZHENG. Preparation of Methyl Lactate from Glucose Using SnO₂-Pt/γ-Al₂O₃ Catalyst[J]. Chemistry and Industry of Forest Products, 2019, 39(3): 49-56.

图/表 7

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使用次数/次 using time	葡萄糖转化率/% conversion of glucose	乳酸甲酯选择性/% selectivity of MLA
1	92.63	20.08
2	89.71	19.64
3	88.43	19.27

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SnO₂-Pt/γ-Al₂O₃催化葡萄糖制备乳酸甲酯的研究

Preparation of Methyl Lactate from Glucose Using SnO₂-Pt/γ-Al₂O₃ Catalyst

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