Au、Pt改性HZSM-5纳米沸石催化剂上的甲醇羰基化反应性能研究

艾沙·努拉洪; 赵艳慧; 毕坤豪; 马亚亚; 莫文龙; 马凤云

doi:10.13568/j.cnki.651094.2019.02.006

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Au、Pt改性HZSM-5纳米沸石催化剂上的甲醇羰基化反应性能研究

更新时间：2026-01-21

- Au、Pt改性HZSM-5纳米沸石催化剂上的甲醇羰基化反应性能研究
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 36, Issue 2, Pages: 160-168(2019)
- 作者机构：
  
  新疆大学化学化工学院煤炭洁净转化与化工过程新疆维吾尔自治区重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.2019.02.006
  CLC： O621.251
- Published：2019
- 稿件说明：
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[1]艾沙·努拉洪,赵艳慧,毕坤豪,等.Au、Pt改性HZSM-5纳米沸石催化剂上的甲醇羰基化反应性能研究[J],2019,36(02):160-168+173.
[1]艾沙·努拉洪,赵艳慧,毕坤豪,等.Au、Pt改性HZSM-5纳米沸石催化剂上的甲醇羰基化反应性能研究[J],2019,36(02):160-168+173. DOI： 10.13568/j.cnki.651094.2019.02.006.

DOI：10.13568/j.cnki.651094.2019.02.006.

摘要

采用固定床-微反装置

在临氢和非临氢状态下

评价了金、铂改性的纳米HZSM-5催化剂上甲醇的反应活性和羰基化选择性.结果表明:在300℃时

载体HZSM-5、0.3%Pt/HZSM-5、2.0%Pt/HZSM-5、3.0%Pt/HZSM-5催化剂甲醇临氢转化率分别为43.89%、95.05%、87.24%、62.49%;甲酸甲酯选择性分别为39.29%、80.07%、84.49%、64.37%;乙酸甲酯选择性分别为32.35%、22.79%、13.46%、11.29%.相比之下

在纳米HZSM-5载体上负载0.3%Au、2.0%Au和3.0%Au时

甲醇的临氢转化率分别为71.72%、82.90%和55.13%.甲酸甲酯选择性分别为60.97、81.85%和42.19%.乙酸甲酯选择性分别为20.48%、20.70%和19.16%.不难看出

随着金负载量的增加

甲醇转化率、乙酸甲酯选择性和甲酸甲酯选择性均有所增加.另外

在临氢和不临氢情况下

催化剂的性能有明显的区别.不临氢时

随着Au和Pt负载量的增加

甲醇转化率降低明显

产物甲酸甲酯选择性也是降低的

而乙酸甲酯的选择性有所增加.当引入氢时

甲酸甲酯的选择性随氢增加

并且乙酸甲酯的选择性显著降低.以上结果可能与催化剂的表面酸性、结构特征、晶体尺寸等密切相关.

Abstract

The activity and carbonylation selectivity of methanol on gold and platinum modified nanoHZSM-5 catalysts were systematically studied over micro reactors under both hydrogen and non-hydrogen conditions.The results show that

at 300℃

the parent HZSM-5

0.3%Pt-modified HZSM-5

2.0%Pt-modified HZSM-5 and the 3.0%Pt-modified HZSM-5

with a Pt-modified HZSM-5 a hydrogen conversion of 43.89%、95.05%、87.24%、62.49%

methyl formate selectivity was 39.29%、80.07%、84.49%、64.37%

and methyl acetate selectivity was 32.35%、22.79%、13.46%、11.29%respectively.In contrast

when 0.3%Au、2.0%Au and 3.0%Au were loaded on the parent nano-HZSM-5

the hydrogen conversion was 71.72%、82.09%and55.13%

and the methyl formate selectivity was 60.97%、81.85%and 42.19%

respectively.The methyl acetate selectivity was 20.48%、20.70%and 19.16%

respectively.the methanol conversion

methyl formate and methyl acetate selectivity increase as the gold loading.In addition

hydrogen plays crucial role on the catalyst performance.When hydrogen is absent

the selectivity of the products decreases with the increasing loading of Au and Pt.When hydrogen is introduced

the selectivity of methyl formate increases with hydrogen

and the selectivity of methyl acetate decreases significantly.The above mentioned results are closely related to the surface acidity

structural characteristics

crystal size and the like of the catalyst.

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