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学者姓名:何洪
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Abstract :
Microwave-assisted selective catalytic reduction of nitrogen oxides (NOx) was investigated over Ni-based metal oxides. The NiMn2O4 and NiCo2O4 catalysts were synthesized by the co-precipitation method and their activities were evaluated as potential candidate catalysts for low-temperature NH3-SCR in a microwave field. The physicochemical properties and structures of the catalysts were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), N-2-physisorption, NO adsorption-desorption in the microwave field, H-2-temperature programmed reduction (H-2-TPR) and NH3-temperature programmed desorption (NH3-TPD). The results verified that microwave radiation reduced the reaction temperature required for NH3-SCR compared to conventional heating, which needed less energy. For the NiMn2O4 catalyst, the catalytic efficiency exceeded 90% at 70 C and reached 96.8% at 110 C in the microwave field. Meanwhile, the NiMn2O4 also exhibited excellent low-temperature NH3-SCR reaction performance under conventional heating conditions, which is due to the high BET specific surface area, more suitable redox property, good NO adsorption-desorption in the microwave field and rich acidic sites.
Keyword :
Selective catalytic reduction Selective catalytic reduction NOx NOx Microwave field Microwave field Spinel oxides Spinel oxides
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GB/T 7714 | Song, Liyun , Deng, Shilin , Bian, Chunyi et al. NiB2O4 (B = Mn or Co) catalysts for NH3-SCR of NOx at low-temperature in microwave field [J]. | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING , 2023 , 17 (8) . |
MLA | Song, Liyun et al. "NiB2O4 (B = Mn or Co) catalysts for NH3-SCR of NOx at low-temperature in microwave field" . | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 17 . 8 (2023) . |
APA | Song, Liyun , Deng, Shilin , Bian, Chunyi , Liu, Cui , Zhan, Zongcheng , Li, Shuangye et al. NiB2O4 (B = Mn or Co) catalysts for NH3-SCR of NOx at low-temperature in microwave field . | FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING , 2023 , 17 (8) . |
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Abstract :
负载型金属纳米粒子催化剂被广泛应用于化工工业生产中,但由于金属在高温环境中容易烧结而导致催化剂失活,因此提高催化剂的高温热稳定性是多相催化领域的重大挑战.本文概述了金属纳米颗粒的高温烧结机制:纳米粒子迁移-聚集过程(PMC)和Ostwald熟化(OR),讨论了近年来通过增强金属-载体相互作用、调节金属纳米粒子与包裹层之间的界面效应、构建多功能结构等方法在制备抗烧结型金属纳米催化剂方面的研究进展并对其进行总结.
Keyword :
高温热稳定性 高温热稳定性 烧结 烧结 催化剂工程 催化剂工程 金属纳米粒子 金属纳米粒子
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GB/T 7714 | 李淑贞 , 张桂臻 , 杨晓栋 et al. 抗烧结型金属纳米催化剂的制备策略 [J]. | 工业催化 , 2023 , 31 (7) : 1-14 . |
MLA | 李淑贞 et al. "抗烧结型金属纳米催化剂的制备策略" . | 工业催化 31 . 7 (2023) : 1-14 . |
APA | 李淑贞 , 张桂臻 , 杨晓栋 , 张龙 , 陈戈 , 邱文革 et al. 抗烧结型金属纳米催化剂的制备策略 . | 工业催化 , 2023 , 31 (7) , 1-14 . |
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Abstract :
In recent years, low-temperature SCR (Selective Catalytic Reduction) denitrification technology has been popularized in non-power industries and has played an important role in the control of industrial flue gas NOx emissions in China. Currently, the most commonly used catalysts in industry are V2O5-WO3(MoO3)/TiO2, MnO2-based catalysts, CeO2-based catalysts, MnO2-CeO2 catalysts and zeolite SCR catalysts. The flue gas emitted during industrial combustion usually contains SO2, moisture and alkali metals, which can affect the service life of SCR catalysts. This paper summarizes the mechanism of catalyst poisoning and aims to reduce the negative effect of NH4HSO4 on the activity of the SCR catalyst at low temperatures in industrial applications. It also presents the outstanding achievements of domestic companies in denitrification in the non-power industry in recent years. Much progress has been made in the research and application of low-temperature NH3-SCR, and with the renewed demand for deeper NOx treatments, new technologies with lower energy consumption and more functions need to be developed.
Keyword :
selective catalytic reduction selective catalytic reduction low temperature low temperature nitrogen oxides nitrogen oxides non-power non-power catalyst poisoning catalyst poisoning
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GB/T 7714 | Zhu, Hongtai , Song, Liyun , Li, Kai et al. Low-Temperature SCR Catalyst Development and Industrial Applications in China [J]. | CATALYSTS , 2022 , 12 (3) . |
MLA | Zhu, Hongtai et al. "Low-Temperature SCR Catalyst Development and Industrial Applications in China" . | CATALYSTS 12 . 3 (2022) . |
APA | Zhu, Hongtai , Song, Liyun , Li, Kai , Wu, Rui , Qiu, Wenge , He, Hong . Low-Temperature SCR Catalyst Development and Industrial Applications in China . | CATALYSTS , 2022 , 12 (3) . |
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GB/T 7714 | Zhang, Ningqiang , Li, Lingcong , Chu, Ya et al. High Pt utilization efficiency of electrocatalysts for oxygen reduction reaction in alkaline media (vol 332, pg 101, 2019) [J]. | CATALYSIS TODAY , 2022 , 388-389 : 424-425 . |
MLA | Zhang, Ningqiang et al. "High Pt utilization efficiency of electrocatalysts for oxygen reduction reaction in alkaline media (vol 332, pg 101, 2019)" . | CATALYSIS TODAY 388-389 (2022) : 424-425 . |
APA | Zhang, Ningqiang , Li, Lingcong , Chu, Ya , Zheng, Lirong , Sun, Shaorui , Zhang, Guizhen et al. High Pt utilization efficiency of electrocatalysts for oxygen reduction reaction in alkaline media (vol 332, pg 101, 2019) . | CATALYSIS TODAY , 2022 , 388-389 , 424-425 . |
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Abstract :
Developing a catalyst with high SO2 and H2O resistance to achieve high-performance CO oxidation for specific industrial applications is highly desirable. Here, three catalysts were prepared using cerium titanium composite oxide (CeTi), molybdophosphate with Keggin structure-modified CeTi (Keg-CeTi), and molybdophosphate without Keggin structure-modified CeTi (MoP-CeTi) as supports, and their sulfur and water resistance in CO oxidation were tested. The characterization of XRD, BET, SO2/H2O-DRIFTS, XPS, TEM, SEM, NH3/SO2-TPD, H-2-TPR, and ICP techniques revealed that the high SO2 and H2O resistance of Pt/Keg-CeTi in CO oxidation was related to its stronger surface acidity, better reduction of surface cerium and molybdenum species, and lower SO2 adsorption and transformation compared to Pt/CeTi and Pt/MoP-CeTi.
Keyword :
platinum-based catalyst platinum-based catalyst Keggin structure Keggin structure sulfur and water resistance sulfur and water resistance CO oxidation CO oxidation
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GB/T 7714 | Zhang, Tong , Qiu, Wenge , Zhu, Hongtai et al. Promotion Effect of the Keggin Structure on the Sulfur and Water Resistance of Pt/CeTi Catalysts for CO Oxidation [J]. | CATALYSTS , 2022 , 12 (1) . |
MLA | Zhang, Tong et al. "Promotion Effect of the Keggin Structure on the Sulfur and Water Resistance of Pt/CeTi Catalysts for CO Oxidation" . | CATALYSTS 12 . 1 (2022) . |
APA | Zhang, Tong , Qiu, Wenge , Zhu, Hongtai , Ding, Xinlei , Wu, Rui , He, Hong . Promotion Effect of the Keggin Structure on the Sulfur and Water Resistance of Pt/CeTi Catalysts for CO Oxidation . | CATALYSTS , 2022 , 12 (1) . |
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Abstract :
高温热稳定性的提高是车用三效催化剂目前面临的主要挑战之一。利用原子层沉积技术(ALD)在新鲜Pt/Al_2O_3催化剂上分别沉积了CeO_2、TiO_2和La_2O_3薄层,采用X射线衍射、透射电子显微镜、氮气低温吸附-脱附和氢气程序升温还原等对催化剂的物理化学性质进行表征,研究沉积氧化物薄层对Pt/Al_2O_3催化剂三效催化反应活性和热稳定性的影响。结果表明,沉积CeO_2、TiO_2和La_2O_3薄层可以提高催化剂性能,还能抑制Pt纳米粒子在800℃和10 h老化过程中聚集长大。在CeO_2、TiO_2和La_2O_3修饰的催化剂中,Pt/Al_2O_3@TiO_2催化剂具有最好的三效...
Keyword :
催化化学 催化化学 Pt/Al_2O_3催化剂 Pt/Al_2O_3催化剂 三效催化活性 三效催化活性 原子层沉积 原子层沉积 金属氧化物层 金属氧化物层 热稳定性 热稳定性
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GB/T 7714 | 何泽源 , 朱雨菲 , 张桂臻 et al. 原子层沉积金属氧化物层对Pt/Al_2O_3催化剂三效催化活性和热稳定性的影响 [J]. | 工业催化 , 2022 , 30 (06) : 46-52 . |
MLA | 何泽源 et al. "原子层沉积金属氧化物层对Pt/Al_2O_3催化剂三效催化活性和热稳定性的影响" . | 工业催化 30 . 06 (2022) : 46-52 . |
APA | 何泽源 , 朱雨菲 , 张桂臻 , 李淑贞 , 杨晓栋 , 邱文革 et al. 原子层沉积金属氧化物层对Pt/Al_2O_3催化剂三效催化活性和热稳定性的影响 . | 工业催化 , 2022 , 30 (06) , 46-52 . |
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Abstract :
本发明属于大气污染治理技术和环保催化材料技术领域,公开了一种同时去除烟气中氮氧化物和一氧化碳的催化剂及制备方法和应用。本发明中所述催化剂以可溶性锰盐分别与可溶性钴盐、可溶性镍盐混合,采用共沉淀法、水热法制备得到锰钴复合氧化物、镍锰复合氧化物。采用微波加热方法对锰钴复合氧化物、镍锰复合氧化物进行活性评价,所述锰钴复合氧化物、镍锰复合氧化物催化剂能够在低温条件下对氮氧化物和一氧化碳都起到很好的去除作用。
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GB/T 7714 | 宋丽云 , 刘翠 , 邓世林 et al. 一种同时去除烟气中氮氧化物和一氧化碳的催化剂及制备方法和应用 : CN202210903968.X[P]. | 2022-07-28 . |
MLA | 宋丽云 et al. "一种同时去除烟气中氮氧化物和一氧化碳的催化剂及制备方法和应用" : CN202210903968.X. | 2022-07-28 . |
APA | 宋丽云 , 刘翠 , 邓世林 , 李坚 , 边春艺 , 何洪 . 一种同时去除烟气中氮氧化物和一氧化碳的催化剂及制备方法和应用 : CN202210903968.X. | 2022-07-28 . |
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Abstract :
一种针对不同靶点蛋白进行药物设计的通用性方法属于计算机人工智能与新药设计领域,包括训练分子生成模型、训练药物靶标亲和力预测模型,以亲和力模型输出作为奖励函数,通过强化学习使分子生成神经网络生成的分子与蛋白质有更好的亲和力。将某个靶点蛋白的氨基酸序列输入到已经训练好的药物设计机器学习模型中,得到针对这个靶点蛋白的小分子抑制剂化合物。
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GB/T 7714 | 孙少瑞 , 张云江 , 何洪 . 一种针对不同靶点蛋白进行药物设计的通用性方法 : CN202210051113.9[P]. | 2022-01-17 . |
MLA | 孙少瑞 et al. "一种针对不同靶点蛋白进行药物设计的通用性方法" : CN202210051113.9. | 2022-01-17 . |
APA | 孙少瑞 , 张云江 , 何洪 . 一种针对不同靶点蛋白进行药物设计的通用性方法 : CN202210051113.9. | 2022-01-17 . |
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Abstract :
Rare earth metals are strategic resources with potential applications in optics, metallurgy and catalysis. In recent years, single-atom site catalysts (SASCs) have attracted increasing attention owing to their 100% atom efficiency and unique catalytic performances. Over the past decade, rare earth elements, including rare earth metals and their oxides, have shown great potential in SASCs. However, systematic analyses of data are still handful. In this mini-review, the use of rare earth metals and their oxides in SASCs was summarized and the results are discussed. A particular focus was paid to the synthetic strategies, characterization of rare earth-containing SASCs, and applications as catalysis supports, promoters and active sites. Current issues faced by rare-earth metals and their oxides in SASCs, as well as future prospects were also provided. (C) 2020 Chinese Society of Rare Earths. Published by Elsevier B.V. All rights reserved.
Keyword :
Characterization Characterization Applications Applications Single-atom site catalysis Single-atom site catalysis Rare earth catalysis Rare earth catalysis Synthetic strategies Synthetic strategies
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GB/T 7714 | Zhang, Ningqiang , Yan, Han , Li, Lingcong et al. Use of rare earth elements in single-atom site catalysis: A critical review - Commemorating the 100th anniversary of the birth of Academician Guangxian Xu [J]. | JOURNAL OF RARE EARTHS , 2021 , 39 (3) : 233-242 . |
MLA | Zhang, Ningqiang et al. "Use of rare earth elements in single-atom site catalysis: A critical review - Commemorating the 100th anniversary of the birth of Academician Guangxian Xu" . | JOURNAL OF RARE EARTHS 39 . 3 (2021) : 233-242 . |
APA | Zhang, Ningqiang , Yan, Han , Li, Lingcong , Wu, Rui , Song, Liyun , Zhang, Guizhen et al. Use of rare earth elements in single-atom site catalysis: A critical review - Commemorating the 100th anniversary of the birth of Academician Guangxian Xu . | JOURNAL OF RARE EARTHS , 2021 , 39 (3) , 233-242 . |
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Abstract :
Fe-based catalysts have a great potential to be used for selective catalytic reduction (SCR) of NOx with NH3 reaction due to their low cost, nontoxicity and excellent catalytic activity. The aim of this paper is to investigate Ce doping effect on activity of NH3-SCR over the FeOx/TiO2 catalyst. In-situ diffuse reflectance infrared fourier transform (DRIFT) technology was utilized to verify the adsorbed species on the surface of FeOx/TiO2 and FeOx-CeO2/TiO2 catalysts. With respect to the obtained results, among the four catalysts studied, the FeOx-CeO2/TiO2 with the FeOx/CeO2 ratio of 3/8 shows the best NO conversion more than 98% in the temperature range of 230-350 degrees C. The active centers for NH3 adsorption and activation are assigned to Lewis acid sites over the FeOx-CeO2/TiO2 and monodentate nitrates can act as the key intermediate in the NH3-SCR. Moreover, both of Langmuir-Hinshelwood and Eley-Rideal mechanisms are observed over the FeOx-CeO2/TiO2 catalysts in the SCR. (C) 2020 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.
Keyword :
Ce doping Ce doping Rare earths Rare earths Selective catalytic reduction Selective catalytic reduction In-situ DRIFT In-situ DRIFT Fe-based catalysts Fe-based catalysts
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GB/T 7714 | Chitsazi, Hossein , Zhang, Ningqiang , Li, Lingcong et al. In-situ DRIFT assessment on strengthening effect of cerium over FeOx/TiO2 catalyst for selective catalytic reduction of NOx with NH3 [J]. | JOURNAL OF RARE EARTHS , 2021 , 39 (5) : 526-531 . |
MLA | Chitsazi, Hossein et al. "In-situ DRIFT assessment on strengthening effect of cerium over FeOx/TiO2 catalyst for selective catalytic reduction of NOx with NH3" . | JOURNAL OF RARE EARTHS 39 . 5 (2021) : 526-531 . |
APA | Chitsazi, Hossein , Zhang, Ningqiang , Li, Lingcong , Liu, Xiaojun , Wu, Rui , He, Junda et al. In-situ DRIFT assessment on strengthening effect of cerium over FeOx/TiO2 catalyst for selective catalytic reduction of NOx with NH3 . | JOURNAL OF RARE EARTHS , 2021 , 39 (5) , 526-531 . |
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