论文总字数：20402字

摘 要

在化学合成、聚合、石油化工和环境保护等化学工业领域，铂以及其元素周期表中相邻元素作为最理想的催化剂而被广泛应用。但是铂族金属或其他VIII族过渡金属，特别是铂、钯、铑、铱、钌等稀有贵金属，需求量逐年增加，其储量却逐年减少，工业上供不应求。由于碳化钼有着与铂金属类似的电子结构和优异的催化性能引起了广泛的关注。近年来对于碳化钼催化剂的研究日见增多。

碳化钼制备方法有热分解法、气相法及程序升温还原法等。目前实验室使用的多为程序升温还原法，通过严格控制反应条件以制得比表面积高的碳化钼催化剂。

本实验通过程序升温还原法（TPR）制备碳化钼，使用再通过浸渍法制备负载型碳化钼催化剂。将制得的负载型碳化钼催化剂用于催化甲酸制氢气以此来测试催化性能，实验过程中将选用不同进样速率、反应温度及甲酸浓度，分别测其对催化性能的影响。

关键词：碳化钼 催化 甲酸 制氢

Research on Mo₂C catalyst for hydrogen production from formic acid

Abstract

In the field of chemical synthesis, chemical industry, polymerization, petrochemical and environmental protection, platinum and its adjacent elements in the periodic table is widely used as a catalyst. But platinum and other VIII group transition element metals, especially platinum, palladium, rhodium, iridium, ruthenium and other rare and precious metals, can not afford the demand of industrial production. Since molybdenum carbide and platinum metals with similar electronic structure and excellent catalytic performance has attracted wide attention. Research on molybdenum carbide catalyst has increased in recent years.

Preparation of molybdenum carbide can use thermal decomposition, fumed and temperature-programmed reduction (TPR) method. The laboratory used mostly for temperature-programmed reduction, by strictly controlling the reaction conditions to produce a high surface area than the molybdenum carbide catalyst. TPR method is wildly used in laboratory today. By strictly controlling the reaction conditions, using TPR method can produce a high surface area molybdenum carbide catalyst.

In this research, we use temperature-programmed reduction (TPR) to prepare molybdenum carbide. And then, molybdenum carbide longer supported catalysts prepared by impregnation method. The prepared supported molybdenum carbide catalyst for the catalytic hydrogen-formic acid system, in order to test the catalytic properties. In the experiment using different injection rates, reaction temperature and acid concentration were measured its effect on catalytic performance.

Key Words: Molybdenum carbide; Catalysis; Formic acid; Hydrogen production

目录

1. 绪论……………………………………………………………… 1

1.1背景………………………………………………………………1

1.2甲酸制氢技术……………………………………………………1

1.2.1甲酸概述………………………………………………… 1

1.2.2甲酸制氢优势…………………………………………… 1

1.2.3甲酸催化制氢发展……………………………………… 2

1.3碳化钼催化剂……………………………………………………3

1.3.1碳化钼催化剂概述……………………………………… 3

1.3.2碳化钼的催化机理……………………………………… 4

1.3.3碳化钼催化剂的应用…………………………………… 4

1.加氢及氢解反应…………………………………………… 4

2.氢脱硫及加氢脱氮反应…………………………………… 5

3.异构化反应………………………………………………… 7

4.烃类转化与合成…………………………………………… 8

1.3.4碳化钼催化剂的制备…………………………………… 9

1.程序升温还原法…………………………………………… 9

2.气相法……………………………………………………… 9

3.热分解法……………………………………………………10

1. 实验部分…………………………………………………………11

2.1材料与仪器…………………………………………………… 11

2.2催化剂制备…………………………………………………… 11

2.3催化剂表征…………………………………………………… 12

2.4催化剂催化性能测试………………………………………… 12

2.4.1评价装置………………………………………………… 12

2.4.2实验步骤………………………………………………… 13

1. 实验结果与讨论…………………………………………………15
2. 结束语……………………………………………………………18
3. 参考文献…………………………………………………………19
4. 致谢………………………………………………………………21

一、绪论

1.1背景

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