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Promotional effect of ion-exchanged K on the low-temperature hydrothermal stability of Cu/SAPO-34 and

Chen Wang, Jun Wang, Jianqiang Wang, Meiqing Shen

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1322-1

Abstract: Abstract • K+ hinder the structural degradation of Cu/SAPO-34 under humid condition<100°C. • K+ on Cuthe low activity of Cu/SAPO-34 at high temperature. • The hybrid catalysts with KCu/SAPO-34 and Fe/BetaK ions were introduced onto Cu/SAPO-34 catalysts via the ion-exchange process in order to improve theirFor the fresh Cu/SAPO-34 catalysts, K ions had little influence on the chabazite framework but effectedwere co-employed with K-loaded Cu/SAPO-34, and a wide active temperature window of SCR activity was

Keywords： Selective catalytic reduction     Cu/SAPO-34 catalyst     Ion-exchanged K     Low-temperature hydrothermal stability     Fe/Beta catalyst    

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Kinetic study of the methanol to olefin process on a SAPO-34 catalyst

Mehdi SEDIGHI,Kamyar KEYVANLOO

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 306-311 doi: 10.1007/s11705-014-1440-z

Abstract: In this paper, a new kinetic model for methanol to olefin process over SAPO-34 catalyst was developed

Keywords： methanol to olefin     SAPO-34     kinetic modeling     elementary step    

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Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 226-238 doi: 10.1007/s11705-018-1709-8

Abstract: methanol-to-olefin (MTO) reaction was investigated in a bench-scale, fixed-bed reactor using an extruded catalystcomposed of a commercial SAPO-34 (65 weight percentage, wt-%) embedded in an amorphous SiO matrix (The texture properties, acidity and crystal structure of the pure SAPO-34 and its extruded form (E-SAPOcatalyst.Subsequently, E-SAPO-34 was tested in a temperature range between 300 and 500 °C, using an aqueous methanol

Keywords： MTO     SAPO-34     temperature     extrusion     coke     light alkanes    

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High-precision diffusion measurement of ethane and propane over SAPO-34 zeolites for methanol-to-olefin

Dali Cai, Yu Cui, Zhao Jia, Yao Wang, Fei Wei

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 77-82 doi: 10.1007/s11705-017-1684-5

Abstract: However, a quantitative study of diffusion problems in SAPO-34 zeolites is lacking.-34.The diffusions of ethane and propane over fresh and coked SAPO-34 zeolites with different crystal sizesEthane and propane show different diffusion behavior in SAPO-34.We believe that this work would be helpful for understanding the diffusion of different molecules in SAPO-34

Keywords： diffusion measurement     methanol-to-olefin process    

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Effect of SiO

Qian WANG, Lei WANG, Hui WANG, Zengxi LI, Xiangping ZHANG, Suojiang ZHANG, Kebin ZHOU

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 79-88 doi: 10.1007/s11705-010-0550-5

Abstract: A series of SAPO-34 molecular sieves with different SiO /Al O ratios have been synthesized for the methanol-to-olefincompared with those of the commercial HZSM-5, which show that the crystallinity and particle diameter of SAPO-34The variation of BET surface area of SAPO-34 is different from that of HZSM-5 and the sample with SiOnsted acid sites are stronger, whereas SAPO-34 samples are dominated only by Lewis acid sites.In contrast, the main products of this reaction catalyzed by SAPO-34 are ethylene and propylene.

Keywords： HZSM-5     SAPO-34     methanol-to-olefin (MTO)     SiO2/Al2O3 ratio    

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Reconstruction of Cu–ZnO catalyst by organic acid and deactivation mechanism in liquid-phase hydrogenation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 9,   Pages 1311-1319 doi: 10.1007/s11705-022-2281-9

Abstract: A reconstructed Cu–ZnO catalyst with improved stability was fabricated by organic acid treatment methodAccording to the characterization results of the fresh Cu–ZnO and reconstructed Cu–ZnO, three differentspecies, ZnO that weakly interacted with Cu species and isolated ZnO.The reconstruction of the Cu–ZnO catalyst by the organic acid treatment method resulted in a new Cu–ZnOcatalyst with more Cu+ and less ZnO species that leads to deactivation.

Keywords： liquid phase     hydrogenation     Cu–ZnO     deactivation mechanism     1     4-butanediol     diester    

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Study on the hydrorefining of heavy oil from biomass alcoholysis in the presence of V-W-Mo-Cu catalyst

Zou Xianwu,Qin Tefu,Li Gaiyun and Huang Luohua

Strategic Study of CAE 2014, Volume 16, Issue 4,   Pages 69-73

Abstract: Therefore，the hydrorefining of heavy oil was studied in the presence of V-W-Mo-Cu catalyst in this paper.Theresults showed that the catalyst revealed its reactivity only at above 330 ℃，and achieved the highestHowever，the Fourier transform infrared spectrometer (FTIR) analysis on catalyst after hydrogenation showedAfter being baked at 550 ℃，the catalyst could be reused more than 5 times，and the yield of light oil

Keywords： biomass     alcoholysis     heavy oil     hydrogenation     V-W-Mo-Cu catalyst     image processing    

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Efficient and selective electro-reduction of nitrobenzene by the nano-structured Cu catalyst prepared

Yali CHEN,Lu XIONG,Weikang WANG,Xing ZHANG,Hanqing YU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 897-904 doi: 10.1007/s11783-015-0782-1

Abstract: Electrochemical reduction is a promising method and Cu-based catalysts have been found to be an efficientIn this work, Cu catalysts with different morphologies were fabricated on Ti plate using a facile electrodepositonThe dendritic nano-structured Cu catalysts obtained at high applied voltages exhibited an excellent efficiencyinitial nitrobenzene concentration on the selective reduction of nitrobenzene to aniline using the CuThe fabricated nano-structured Cu catalysts also exhibited good stability.

Keywords： nitrobenzene     nano-structured Cu     electro-reduction     voltage-dependent electrodeposition     high selectivity    

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Preparation of Cu/ZnO/Al

Hui FAN, Huayan ZHENG, Zhong LI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 445-451 doi: 10.1007/s11705-010-0521-x

Abstract: Cu/ZnO/Al O catalysts with Cu/Zn/Al ratios of 6/3/1 were precipitated and aged by conventional and microwavemicrowave irradiation on the catalytic performance was investigated to optimize the preparing condition of Cu/ZnO/Al O catalyst., the catalyst aged at 80°C for 1 h under microwave irradiation possessed higher methanol space timeThe activity and stability of the catalyst was further enhanced when microwave irradiation was used in

Keywords： microwave irradiation     precipitation temperature     aging temperature     methanol synthesis     Cu/ZnO/Al2O3 catalyst    

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NO hydrogenation to NH over FeCu/TiO catalyst with improved activity

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1973-1985 doi: 10.1007/s11705-023-2364-2

Abstract: Hence, developing an efficient and environmentally friendly catalyst is imperative.In this study, we employed a straightforward and efficient impregnation technique to create various Cu-dopedNotably, the optimized 10Fe-8Cu/TiO2 catalyst exhibited exceptional catalytic performanceOur findings unequivocally demonstrate that Cu doping enhances the rate-limiting hydrogenation step and

Keywords： NO hydrogenation     synthetic ammonia     10Fe-xCu/TiO2     high selectivity    

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Mechanistic understanding of Cu-based bimetallic catalysts

You Han, Yulian Wang, Tengzhou Ma, Wei Li, Jinli Zhang, Minhua Zhang

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 689-748 doi: 10.1007/s11705-019-1902-4

Abstract: Herein, we reviewed two modification mechanisms of co-catalyst on the coordination environment changeof Cu-based catalysts: (1) change the electronic orbitals and geometric structure of Cu without anyinfluencing mechanisms of different types of auxiliary metals on the structure-activity relationship of Cu-basedmechanistic understanding can provide significant guidance for the design and controllable synthesis of novel Cu-based

Keywords： copper     bimetallic catalyst     coordination     modification mechanism     catalytic application    

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Effects of the SAPO-11 synthetic process on dehydration of ethanol to ethylene

Lina WU, Xiaoxing SHI, Qun CUI, Haiyan WANG, He HUANG

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 60-66 doi: 10.1007/s11705-010-0540-7

Abstract: The effects of the synthetic condition of SAPO-11 molecular sieves on ethanol dehydration to ethyleneProduct-compositions, ethanol conversion, and selectivity to ethylene of synthesized and commercial SAPOFrom the patterns of NH -TPD, the amount of acid synthesized by SAPO-11 molecular sieves is less thanthat by commercial SAPO-11 molecular sieves, and has a stronger weak acid.by 20°C compared to commercial SAPO-11.

Keywords： SAPO-11 molecular sieves     synthesis     ethanol     ethylene     dehydration    

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Correlative investigation of copper/low-density polyethylene nanocomposite on the endometrial angiogenesis in rats

LI Jianxiong, LIU Zilong, DUAN Yonggang, YU Jing, ZHU Changhong, LI Shuang, XIE Changsheng

Frontiers of Medicine 2007, Volume 1, Issue 4,   Pages 401-404 doi: 10.1007/s11684-007-0078-3

Abstract: of this study was to investigate the effects of copper/low-density polyethylene nanocomposite (nano-Cuwere randomly divided into five groups: sham-operation groups (SO group, = 20), bulk copper groups (Cugroup, = 20), LDPE groups ( = 20), nano-Cu/LDPE groups I ( = 20) and II ( = 20).The levels of angiopoietin-2 (Ang-2), its receptor (Tie-2) and CD34 of the rats endometria in each groupwith those in Cu group (<0.05).

Keywords： significant difference     female     endometrial angiogenesis     nano-Cu/LDPE     CD34    

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Clinical significance of CD34+CD117dim/CD34+CD117bri myeloblast-associated

Xueping Li, Yuting Dai, Bing Chen, Jinyan Huang, Saijuan Chen, Lu Jiang

Frontiers of Medicine 2021, Volume 15, Issue 4,   Pages 608-620 doi: 10.1007/s11684-021-0836-7

Abstract: Two leukemic myeloblast populations (CD34 CD117 and CD34 CD117 ) were previously identified in t(8;21) AML, and CD34 CD117 cell proportion was determined as an independent factor for this disease outcomeHere, we examined the impact of CD34 CD117 /CD34 CD117 myeloblast-associated gene expression on t(8;The mRNA expression levels of CD34 CD117 -associated genes ( , , and ) and CD34 CD117 -associated genesIdentifying the clinical relevance of CD34 CD117 /CD34 CD117 myeloblast-associated gene expression may

Keywords： t(8     21)(q22     q22) AML     CD34+CD117dim/ CD34+CD117bri cell population    

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Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation

Xinxiang Cao,Arash Mirjalili,James Wheeler,Wentao Xie,Ben W.-L. Jang

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4,   Pages 442-449 doi: 10.1007/s11705-015-1547-x

Abstract: Galvanic replacement, co-impregnation and sequential impregnation have been employed to prepare Pd-Cubimetallic catalysts with less than 1 wt-% Cu and ca. 0.03 wt-% Pd for selective hydrogenation of acetylenefield-scanning transmission electron microscopy (HAADF-STEM) and H chemisorption results confirmed that Pd-CuFurthermore, the single atom alloy catalyst prepared by sequential incipient wetness impregnation was

Keywords： H2 pulse chemisorption     palladium-copper bimetallic catalyst     single atom alloy     acetylene hydrogenation    

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Title Author Date Type Operation

Promotional effect of ion-exchanged K on the low-temperature hydrothermal stability of Cu/SAPO-34 and

Chen Wang, Jun Wang, Jianqiang Wang, Meiqing Shen

Journal Article

Kinetic study of the methanol to olefin process on a SAPO-34 catalyst

Mehdi SEDIGHI,Kamyar KEYVANLOO

Journal Article

Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Journal Article

High-precision diffusion measurement of ethane and propane over SAPO-34 zeolites for methanol-to-olefin

Dali Cai, Yu Cui, Zhao Jia, Yao Wang, Fei Wei

Journal Article

Effect of SiO

Qian WANG, Lei WANG, Hui WANG, Zengxi LI, Xiangping ZHANG, Suojiang ZHANG, Kebin ZHOU

Journal Article

Reconstruction of Cu–ZnO catalyst by organic acid and deactivation mechanism in liquid-phase hydrogenation

Journal Article

Study on the hydrorefining of heavy oil from biomass alcoholysis in the presence of V-W-Mo-Cu catalyst

Zou Xianwu,Qin Tefu,Li Gaiyun and Huang Luohua

Journal Article

Efficient and selective electro-reduction of nitrobenzene by the nano-structured Cu catalyst prepared

Yali CHEN,Lu XIONG,Weikang WANG,Xing ZHANG,Hanqing YU

Journal Article

Preparation of Cu/ZnO/Al

Hui FAN, Huayan ZHENG, Zhong LI

Journal Article

NO hydrogenation to NH over FeCu/TiO catalyst with improved activity

Journal Article

Mechanistic understanding of Cu-based bimetallic catalysts

You Han, Yulian Wang, Tengzhou Ma, Wei Li, Jinli Zhang, Minhua Zhang

Journal Article

Effects of the SAPO-11 synthetic process on dehydration of ethanol to ethylene

Lina WU, Xiaoxing SHI, Qun CUI, Haiyan WANG, He HUANG

Journal Article

Correlative investigation of copper/low-density polyethylene nanocomposite on the endometrial angiogenesis in rats

LI Jianxiong, LIU Zilong, DUAN Yonggang, YU Jing, ZHU Changhong, LI Shuang, XIE Changsheng

Journal Article

Clinical significance of CD34+CD117dim/CD34+CD117bri myeloblast-associated

Xueping Li, Yuting Dai, Bing Chen, Jinyan Huang, Saijuan Chen, Lu Jiang

Journal Article

Investigation of the preparation methodologies of Pd-Cu single atom alloy catalysts for selective hydrogenation

Xinxiang Cao,Arash Mirjalili,James Wheeler,Wentao Xie,Ben W.-L. Jang

Journal Article