Article
Environmental Sciences
Yu Qin, Wentao Cai, Zeyan Li, Genan Li, Pengfei Liu, Baodeng An, Kan Wu, Jun Gu
Summary: This article presents a pilot study on the removal of NOx from cement kiln flue gas using Ce doped V-W/Ti catalyst in selective catalytic reduction with ammonia (NH3-SCR). The study found that cement kiln dust decreased the denitration efficiency of the catalyst, but the introduction of SO2 and H2O restored and improved the efficiency. Analysis revealed that the Ce and W ratios in the catalyst played a significant role in the denitrification activity. The study also verified and predicted the catalyst's lifespan.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Chemistry, Physical
Xi Qian, Weihua Ao, Hao Ding, Xuan Wang, Sijia Sun
Summary: This article summarizes the processes of regeneration and elemental extraction of spent SCR catalysts, and provides directions for converting them into photocatalysts, highlighting the significance of reducing photocatalyst production costs.
Article
Materials Science, Multidisciplinary
Zhanchao Li, Yun Lei, Wenhui Ma, Yakun Zhang, Shiding Wang
Summary: Ti, W, and V were recovered from waste V2O5-WO3/TiO2 catalyst via silicothermic reduction to prepare W- and V-containing Si-Ti alloys. An optimal reduction slag system and temperature were determined, and the effects of holding time and basicity of the initial slag on the separation of the alloy and reduction of Ti, W, and V oxides were investigated. The study provides a green and efficient method for recycling Ti, W, and V from waste catalysts and for preparing W- and V-containing Si-Ti alloys.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Chemistry, Physical
Xiaoyi Xue, Chuanming Ma, Yanrong Liu, Hao Wang, Qingjun Chen
Summary: Vanadium-based alloys are promising materials for hydrogen storage due to their high capacity at ambient conditions. However, the challenges of complex activation and poor stability at high temperatures limit their large-scale applications. In this study, TiCr3V16Cex (x = 0, 0.1, 0.2, 0.4, 1) hydrogen storage alloys with different Ce contents were developed and investigated for their hydrogen storage performance, activation mechanism, and absorption mechanism. The results showed that Ce doping increased the plateau pressure while slightly decreasing the hydrogen storage capacity. Ce doping also affected the kinetics and thermodynamics of the alloy. The TiCr3V16Cex (x = 0.2, 0.4, 1) alloys exhibited hydrogen absorption and desorption at room temperature without activation. The optimum alloy, TiCr3V16Ce0.2, showed a high hydrogen absorption rate and effective hydrogen desorption capacity. After cycling, the alloy maintained its original capacity. The Ce-doped BCC alloy developed in this study offers a new route for achieving high hydrogen storage performance under mild conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jingjing Song, Shaomian Liu, Yongjun Ji, Wenqing Xu, Jian Yu, Bing Liu, Wenxing Chen, Jianling Zhang, Lihua Jia, Tingyu Zhu, Ziyi Zhong, Guangwen Xu, Fabing Su
Summary: The dual single-atom Ce-Ti/MnO2 catalyst prepared via ball-milling and calcination processes exhibited better catalytic performance at low temperatures, with higher NO conversion and enhanced resistance to H2O and SO2.
Article
Engineering, Environmental
Haishuang Wang, Nan Chen, Chuanping Feng, Yang Deng, Jibo Qin
Summary: The co-contamination of NO3 and V(V) is a serious environmental issue, for which the understanding of degradation pathways and electron competition sequence is limited. This study found that vanadium leads to the accumulation of NO and N2O, while NO3 and NO2 promote vanadium activation. The carbon metabolism analysis revealed that glycolysis, pentose phosphate, and TCA cycle pathways provide sufficient energy for pollutants reduction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Xingjie Wang, Zoha H. Syed, Zhihengyu Chen, J. David Bazak, Xinyi Gong, Megan C. Wasson, Nancy M. Washton, Karena W. Chapman, Justin M. Notestein, Omar K. Farha
Summary: In order to increase catalytic efficiency, researchers have successfully introduced a redox-active heterometallic Ce12V6-oxo cluster into mesoporous silica material SBA-15, demonstrating improved structural integrity and higher reactivity, which provides new insights for catalyst design and applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Environmental Sciences
Haishuang Wang, Nan Chen, Chuanping Feng, Yang Deng
Summary: The coexistence of nitrate and V(V) in groundwater poses potential threats to the environment and public health. For the first time, it has been shown that denitrification and V(V) bio-reduction can occur simultaneously using corn straw as the carbon and energy source. Corn straw has been proven to be efficient in denitrification and V(V) bio-reduction in various environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Tieyao Xu, Xiaolong Liu, Tingyu Zhu, Chenglin Feng, Yutao Hu, Mengkui Tian
Summary: A series of TiO2 catalysts loaded with 0.1 wt% Pt and n% WO3 were prepared and tested for CO oxidation activity and stability. Among them, 0.1Pt-5W/Ti-A showed the best performance in the presence of H2O and SO2. H2O greatly improved the catalytic oxidation efficiency, while WO3 doping enhanced the sulfur tolerance of the catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Xingjie Wang, Kieran Brunson, Haomiao Xie, Ian Colliard, Megan C. Wasson, Xinyi Gong, Kaikai Ma, Yufang Wu, Florencia A. Son, Karam B. Idrees, Xuan Zhang, Justin M. Notestein, May Nyman, Omar K. Farha
Summary: New Ce12V6 oxo clusters with different capping ligands were designed and synthesized, showing enhanced solubility and catalytic activity compared to the nonporous Ce12V6-SO4. The introduction of organic ligands improved the accessibility of catalytic sites and influenced the electronic environment, affecting the reactivity of the cluster. This study provides a strategy to fully utilize the catalytic sites within inorganic sulfate capped clusters through the introduction of organic ligands.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Haishuang Wang, Nan Chen, Chuanping Feng, Yang Deng, Wang Lu
Summary: In this study, it was found that microorganisms may be the driving force to distinguish vanadium release and reduction processes in a complex contaminated system with a liquid carbon source. Experiments were conducted to observe the variation of nitrate and V(v) under anaerobic conditions with different liquid carbon sources. The results showed that certain microbial genera were associated with the release and reduction of V(v), providing a potential bioremediation strategy for nitrate and V(v) co-contaminated environments.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Huidong Xie, Cheng Chen, Peiwen He, Ge Mu, Kangkang Wang, Chang Yang, Shouning Chai, Na Wang, Chengmin Ge
Summary: A series of xSb-4Ce-10Mn/TiO2 catalysts with different Sb5+/Sb3+ loadings were prepared and their performances were investigated. The catalyst with a loading of 4 showed the best catalytic activity, selectivity, and resistance. The addition of Sb5+/Sb3+ slightly decreased the activity but improved the resistance, and also altered the chemical composition of the catalyst.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Xueke Shi, Jiaxiu Guo, Ting Shen, Aidong Fan, Shandong Yuan, Jianjun Li
Summary: Cerium modified La-Mn oxides show high NOx conversion rates and N2 selectivity in NH3-SCR reaction, with good resistance to SO2 and H2O. Ce doping optimizes the structure of La-Mn oxides, allowing them to maintain their perovskite structure while some CeOx and Mn3O4 leak out.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Ley Boon Sim, Kek Seong Kim, Jile Fu, Binghui Chen
Summary: The study found that Ti modification can effectively improve the distribution of vanadium species, enhancing the overall redox properties and catalytic performance of V-HMS catalysts. The catalytic activity of V-Ti-HMS catalysts is approximately two times higher than that of V-HMS catalysts, attributed to the improved dispersion and reducibility of vanadium oxides.
Article
Engineering, Environmental
Lijun Jiang, Ya Liang, Weizao Liu, Hongli Wu, Tahani Aldahri, Dennise Sosa Carrero, Qingcai Liu
Summary: This study achieved excellent performance of Mn-Fe(0.4)-Ce(0.4)/ACN catalyst by co-doping FeOx and CeOx, including improved catalytic activity, N-2 selectivity, and SO2 tolerance. Co-doping FeOx and CeOx promoted NH3-SCR performance and effectively inhibited the adsorption and reaction of SO2.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
