程序升温碳化法一步合成Cu/β-Mo<sub>2</sub>C催化剂及其RWGS反应性能研究

张译文; 戴咏川; 么志伟; 丁巍; 刘芷君; 宋官龙

doi:10.12434/j.issn.2097-2547.20230071

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程序升温碳化法一步合成Cu/β-Mo₂C催化剂及其RWGS反应性能研究

C1化学与催化转化

- 程序升温碳化法一步合成Cu/β-Mo₂C催化剂及其RWGS反应性能研究
- One step synthesis of Cu/β-Mo₂C catalyst by temperature programmed carbonization method and its performance in RWGS reaction
- 低碳化学与化工
- 作者机构：
  
  1. 辽宁石油化工大学石油化工学院,辽宁,抚顺,113001
  2. 辽宁宝来生物能源有限公司,辽宁,盘锦,124119
- 作者简介：
- 基金信息：
  
  国家自然科学基金（21802061,21978125）;中央引导地方科技发展专项基金（2021JH6/10500154）;辽宁省教育厅重点攻关科研项目（L2020001）;抚顺英才计划（FSYC202101001）
- DOI：10.12434/j.issn.2097-2547.20230071
  中图分类号：
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张译文, 戴咏川, 么志伟, 等. 程序升温碳化法一步合成Cu/β-Mo₂C催化剂及其RWGS反应性能研究[J]. 低碳化学与化工.

ZHANG Yiwen, DAI Yongchuan, YAO Zhiwei, et al. One step synthesis of Cu/β-Mo₂C catalyst by temperature programmed carbonization method and its performance in RWGS reaction[J]. Low-Carbon Chemistry and Chemical Engineering.
张译文, 戴咏川, 么志伟, 等. 程序升温碳化法一步合成Cu/β-Mo₂C催化剂及其RWGS反应性能研究[J]. 低碳化学与化工. DOI： 10.12434/j.issn.2097-2547.20230071.

ZHANG Yiwen, DAI Yongchuan, YAO Zhiwei, et al. One step synthesis of Cu/β-Mo₂C catalyst by temperature programmed carbonization method and its performance in RWGS reaction[J]. Low-Carbon Chemistry and Chemical Engineering. DOI： 10.12434/j.issn.2097-2547.20230071.

摘要

在逆水煤气变换(RWGS)反应中，Cu氧化物催化剂在高温下极易发生失活，而过渡金属碳化物具有分散和稳定Cu颗粒的作用。以七钼酸铵(AMT)、六次甲基四胺(HMT)和硝酸铜为原料，通过程序升温碳化法一步合成了Cu负载量(质量分数，下同)为1%、3%的Cu/β-Mo,2,C催化剂，采用XRD、H,2,-TPR、SEM和HRTEM进行了表征。结果表明，Cu的加入直接使β-Mo,2,C的特征衍射峰变弱，说明金属与载体发生了强相互作用。低负载量的Cu在β-Mo,2,C载体上以5 nm大小的纳米粒子均匀地分散，具有更多的活性中心。其中1%Cu/β-Mo,2,C催化剂在600℃下的CO,2,转化率和CO选择性分别为51.00%和100%；表观活化能为24.69 kJ/mol，低于3%Cu/β-Mo,2,C，具有良好的活性和稳定性。研究证实1%Cu/β-Mo,2,C具有良好的催化性能，是RWGS潜在的高效催化剂。

Abstract

In the reverse water-gas shift（RWGS） reaction,the Cu oxide catalyst is easily deactivated at high temperature,but the transition metal carbide has the function of dispersing and stabilizing Cu particles.Cu/β-Mo,2,C catalysts with 1% and 3% Cu loads（mass fraction,the same as below） were synthesized using ammonium heptadolybdate（AMT）,hexamethyltetramine（HMT） and copper nitrate as materials by one-step temperature programmed carbonization method.The catalysts were characterized by XRD,H,2,-TPR,SEM and HRTEM.The results show that the addition of Cu directly weakens the characteristic diffraction peak of β-Mo,2,C,indicating strong interaction between the metal and the carrier.The low Cu loads was uniformly dispersed as 5 nm nanoparticles on β-Mo,2,C carrier with more active centers.The CO,2, conversion rate and CO selectivity of 1%Cu/β-Mo,2,C catalyst at 600℃ are 51.00% and100%,respectively.The apparent activation energy is 24.69 kJ/mol,lower than 3%Cu/β-Mo,2,C,showing good activity and stability.It has been confirmed that 1%Cu/β-Mo,2,C has good catalytic performance and is a potential high efficiency catalyst for RWGS reaction.

关键词

程序升温碳化法碳化钼Cu纳米粒子逆水煤气变换反应

Keywords

temperature-programmed carbonizationmolybdenum carbideCu nanoparticlereverse water-gas shift reaction

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程序升温碳化法一步合成Cu/β-Mo2C催化剂及其RWGS反应性能研究

One step synthesis of Cu/β-Mo2C catalyst by temperature programmed carbonization method and its performance in RWGS reaction

DOI：10.12434/j.issn.2097-2547.20230071

摘要

Abstract

关键词

Keywords

references

程序升温碳化法一步合成Cu/β-Mo₂C催化剂及其RWGS反应性能研究

One step synthesis of Cu/β-Mo₂C catalyst by temperature programmed carbonization method and its performance in RWGS reaction