Synergetic effect of Ru and Cu on catalytic wet oxidation of ammonia-wastewater

GENG Lili; YANG Kaixu; ZHANG Nuowei; CHEN Binghui

doi:10.11949/j.issn.0438-1157.20180186

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Synergetic effect of Ru and Cu on catalytic wet oxidation of ammonia-wastewater

更新时间：2025-12-10

- Synergetic effect of Ru and Cu on catalytic wet oxidation of ammonia-wastewater
- CIESC Journal Issue 9, Pages: 3869-3878(2018)
- 作者机构：
  
  1. 昌吉学院化学与应用化学系,新疆,昌吉,831100
  2. 厦门大学化学化工学院, 醇醚酯化工清洁生产国家工程实验室,福建,厦门,361005
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180186
  CLC： Q032
- Online First：05 September 2018，
  
  Published：05 September 2018
- 稿件说明：
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GENG Lili, YANG Kaixu, ZHANG Nuowei, et al. Synergetic effect of Ru and Cu on catalytic wet oxidation of ammonia-wastewater[J]. CIESC Journal, 2018, (9): 3869-3878.
DOI：

GENG Lili, YANG Kaixu, ZHANG Nuowei, et al. Synergetic effect of Ru and Cu on catalytic wet oxidation of ammonia-wastewater[J]. CIESC Journal, 2018, (9): 3869-3878. DOI： 10.11949/j.issn.0438-1157.20180186.

摘要

采用化学还原法制备了RuCu/TiO2双金属催化剂，并探究了Ru和Cu的协同作用对催化湿式氧化（CWAO）无害化处理氨氮废水催化性能的影响。研究结果表明，Cu的添加可有效改善Ru/TiO2催化剂的N2选择性，而Ru的存在可有效提高Cu/TiO2催化剂的催化活性。反应条件为0.5 MPa、150℃、[NH3]0=1000 mg·L-1、pH=12、模拟废水处理量为33 L·（kg cat）-1·h-1时，1Ru2Cu/TiO2能使废水的氨氮转化率和N2选择性分别高达87.7%和85.9%。表征结果表明：Ru和Cu的协同在催化氧化氨氮废水过程中起了关键作用，主要体现在：Ru和Cu的强相互作用导致1Ru2Cu/TiO2催化剂具有良好的抗流失性能，进而使得催化剂具有良好的稳定性；Ru和Cu的电子转移使得1Ru2Cu/TiO2具有适中的亲氧性能，有效提高了催化剂的催化活性。

Abstract

RuCu/TiO2 bimetallic catalysts which were prepared via chemical reduction methods and the synergetic effect between Ru and Cu in the detoxification of ammonia-wastewater to nitrogen via catalytic wet air oxidation (CWAO) were investigated. The results showed that the addition of Cu in Ru/TiO2 can effectively improve the selectivity of N2

while the presence of Ru in Cu/TiO2can greatly enhance the catalytic activity of the catalyst. The catalyst (1Ru2Cu/TiO2) with 1% and 2% loading of Ru and Cu has the best catalytic performance among the prepared catalysts. With the reaction conditions of 0.5 MPa

150℃

[NH3]0=1000 mg·L-1

pH=12 and the application to the simulated wastewater was about 33 L·(kg cat)-1·h-1

1Ru2Cu/TiO2 achieved 87.7% ammonia conversion and 85.9% N2 selectivity. The characterization results demonstrated that the synergetic effect of Ru and Cu played a key role in the catalytic of the ammonia to nitrogen

mainly reflects in the following:the strong interaction between Ru and Cu results in good anti-leaching of 1Ru2Cu/TiO2 catalyst

leading to excellent stability for the catalyst. The electron transfer between Ru and Cu makes 1Ru2Cu/TiO2 has a moderate oxygen affinity

which has effectively enhanced the catalytic activity of the catalyst.

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