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noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study of active

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1986-2000 doi: 10.1007/s11705-023-2337-5

Abstract: On the active metal nanoparticle scale, the role of catalyst size in C–N bond cleavage has not been clearlycatalysts with variable nanoparticle sizes were obtained by modulating the reduction temperature, and the catalyticThe relationship between catalytic site variation and C–N bond cleavage activity was further investigatedby calculating the turnover frequency values for each site.the intrinsic factor of the size dependence of C–N bond cleavage activity, and the step atoms are the active

Keywords： sp3/sp2-hybridized C–N bond     noble metal nanoparticle     catalytic active site     turnover    

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Solid-state NMR for metal-containing zeolites: From active sites to reaction mechanism

Xingling Zhao, Jun Xu, Feng Deng

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 159-187 doi: 10.1007/s11705-019-1885-1

Abstract: To understand the nature of metal active sites and the reaction mechanism over such catalysts is of greatsummarize recent developments and applications of SSNMR for exploring the structure and property of activeFinally, we highlight the mechanistic understanding of catalytic reactions on metal-containing zeolitesbased on the observation of key surface species and active intermediates.

Keywords： metal-containing zeolites     solid-state NMR     active site     host-guest interaction     reaction mechanism    

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Insights into carbon-based materials for catalytic dehydrogenation of low-carbon alkanes and ethylbenzene

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1623-1648 doi: 10.1007/s11705-023-2328-6

Abstract: A general introduction to the dehydrogenation mechanism and active sites of carbon catalysts is brieflyThe approaches for promoting the catalytic activity of carbon catalysts are elaborated with respect toThe regeneration mechanism of carbon-based catalysts is discussed for providing guidance on catalyticaddition, carbon materials as the support of metal-based catalysts contribute to exploiting the excellent catalytic

Keywords： carbon materials     dehydrogenation     active sites     mechanism     catalytic performance     support    

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Catalytic combustion of methane over a highly active and stable NiO/CeO

Xiuhui Huang, Junfeng Li, Jun Wang, Zeqiu Li, Jiayin Xu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 4,   Pages 534-545 doi: 10.1007/s11705-019-1821-4

Abstract: In the last decades, many reports dealing with technology for the catalytic combustion of methane (CHRecently, attention has increasingly focused on the synthesis and catalytic activity of nickel oxidesIn this paper, a NiO/CeO catalyst with high catalytic performance in methane combustion was synthesizedvia a facile impregnation method, and its catalytic activity, stability, and water-resistance duringelectron microscope characterization of the catalyst were conducted to determine the origin of its high catalytic

Keywords： methane combustion     NiO/CeO2 catalyst     interaction     oxygen vacancy     kinetic study    

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Influence of site conditions on seismic design parameters for foundations as determined via nonlinearsite response analysis

Muhammad Tariq A. CHAUDHARY

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 275-303 doi: 10.1007/s11709-021-0685-0

Abstract: Site conditions, including geotechnical properties and the geological setting, influence the near-surfaceparameters ( , , and ) was investigated for National Earthquake Hazards Reduction Program (NEHRP) siteclasses C and D, through 1D nonlinear seismic site response analysis.Predictive relationships for , , and were derived based on the 1D seismic site response analysis

Keywords： site effects     1D seismic site response analysis     sensitivity analysis     foundations     shear wave velocity     soil    

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Tuning of the active phase structure and hydrofining performance of alumina-supported tri-metallic WMoNi

Shufeng Shan, Haiyan Liu, Gang Shi, Xiaojun Bao

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 59-69 doi: 10.1007/s11705-017-1686-3

Abstract: Catalytic tests using a fluid catalytic cracking diesel fuel showed that the changes in the MSIs andthe morphology of the active phases had a more positive effect on the hydrodenitrogenation activity thanshow that incorporating phosphorus into a WMoNi/Al O catalyst can finely tune the structure of the active

Keywords： fluid catalytic cracking diesel     hydrofining performance     WMoNiP/Al2O3     synergetic    

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Microemulsion-mediated hydrothermal synthesis of flower-like MoS

Yuxia Jiang, Donge Wang, Zhendong Pan, Huaijun Ma, Min Li, Jiahe Li, Anda Zheng, Guang Lv, Zhijian Tian

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 32-42 doi: 10.1007/s11705-017-1677-4

Abstract: Their catalytic performance for anthracene hydrogenation was evaluated using a slurry-bed batch reactorThe MoS nanoflowers have high catalytic activities for anthracene hydrogenation.The enhanced hydrogenation activities of MoS nanoflowers can be ascribed to the high exposure of catalyticactive sites, resulting from the smaller particle size, fewer stacking layer, shorter slab length and

Keywords： microemulsion     intercalated MoS2     catalytic hydrogenation     active sites    

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Development and application of an off-site maintenance system in the petrochemical industry

Ruisheng YONG, Yanbing YE, Hanbin LUO, Lieyun DING

Frontiers of Engineering Management 2017, Volume 4, Issue 2,   Pages 111-126 doi: 10.15302/J-FEM-2017027

Abstract: On-site maintenance (ONSM) is critical to ensuring the safety of equipment in the petrochemical industryTo reduce congestion and exposure to hazards during on-site operations and thereby reduce the probabilityof accidents, off-site maintenance (OFSM) is proposed based on Energy Release Theory (ERT).

Keywords： on-site maintenance     petrochemical industry     safety     off-site maintenance system    

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behavior of Co3O4 on HZSM-5 support: designing applicable catalysts for selective catalytic

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1741-1754 doi: 10.1007/s11705-023-2332-x

Abstract: Co3O4/ZSM-5 catalysts with different loadings have been prepared for selective catalyticIt has been revealed that the quantities of surface active oxygen (O2–) and acidsub-monolayers or monolayers and in an amorphous state, which is favorable to generate the two kinds of activesites, hence promoting the performance of ammonia selective catalytic reduction of nitrogen oxide.4/ZSM-5, the catalyst close to the monolayer dispersion capacity, possesses the most abundant active

Keywords： /i>-SCR by NH3     monolayer dispersion threshold effect     surface acid sites     surface active    

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Discussion on the Origin of Deep-fissure Zones at theSite of Pusiluo Dam，Yalongjiang River

Li Ping,Li Yuanjun,Yang Meie,Zhao Dongzhi

Strategic Study of CAE 2007, Volume 9, Issue 3,   Pages 11-20

Abstract: justify;">The deep fissure zones have been discovered during the engineering investigation at Pusiluo dam-site

Keywords： Pusiluo dam-site     Yalongjiang River     deep fissure zone     gravity unloading and gravitygliding     active fault    

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An integrated approach to site-specific management zone delineation

Yuxin MIAO, David J. MULLA, Pierre C. ROBERT

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 4,   Pages 432-441 doi: 10.15302/J-FASE-2018230

Abstract: The objective of this study is to propose an integrated approach to delineating site-specific MZ usingyears of nitrogen (N) rate experiments were conducted in Field B to evaluate the delineated MZs for site-specificIt also has the potential for site-specific N management for improved economic returns.

Keywords： economically optimum nitrogen rate     fuzzy cluster analysis     precision nitrogen management     site-specific    

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Site-directed mutagenesis of long QT syndrome KCNQ1 gene

LI Wei, WANG Bin, XU Qiumei, KE Qinmei, YANG Junguo, DU Rong, TIAN Li, WANG Qing

Frontiers of Medicine 2008, Volume 2, Issue 1,   Pages 100-104 doi: 10.1007/s11684-008-0018-x

Abstract: To construct a polymerase chain reaction (PCR) site-directed mutagenesis of the long QT syndrome KCNQ1The amplified fragments from the third PCR which contained the mutation site were sub-cloned into theand inserted into the same restriction site of pIRES-EGFP-KCNQ1.The sequencing analysis shows that the mutation site was correct.Mutation from A to G in site 983 of KCNQ1 cDNA was found.

Keywords： restriction     digestion     syndrome     sequence     site-directed mutagenesis    

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Construction Technology of Off-Site Precast Concrete Buildings

Ting Gong,Jian Yang,Hao Hu,Feng Xu

Frontiers of Engineering Management 2015, Volume 2, Issue 2,   Pages 122-124 doi: 10.15302/J-FEM-2015039

Abstract: A comparison between traditional on-site and modern off-site construction methods has been conducted.

Keywords： off-site construction     precast concrete     modular construction     construction management     building information    

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Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 1,   Pages 69-82 doi: 10.1007/s11709-014-0231-4

Abstract: In this the present study, an attempt has been made to evaluate the seismic hazard considering local siteeffects by carrying out detailed geotechnical site characterization in Babol, Iran.the Babol’s subsurface database have enabled authors to determine the geotechnical properties of each siteA series of analysis in the study area showed the site period, ranging from 0.4 to 0.8 s.Finally the obtained response spectra from fully nonlinear method were compared with site response spectra

Keywords： fully nonlinear method     site effect     dynamic analysis     response spectra    

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A review on catalytic & non-catalytic bio-oil upgrading in supercritical fluids

Sainab Omar, Yang Yang, Jiawei Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1,   Pages 4-17 doi: 10.1007/s11705-020-1933-x

Abstract: This review article summarizes the key published research on the topic of bio-oil upgrading using catalyticand non-catalytic supercritical fluid (SCF) conditions.The precious metal catalysts Pd, Ru and Pt on various supports are frequently chosen for catalytic bio-oilThis is reportedly due to their favourable catalytic activity during the process including hydrotreating

Keywords： bio-oil     upgrading     supercritical     review    

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Title Author Date Type Operation

noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study of active

Journal Article

Solid-state NMR for metal-containing zeolites: From active sites to reaction mechanism

Xingling Zhao, Jun Xu, Feng Deng

Journal Article

Insights into carbon-based materials for catalytic dehydrogenation of low-carbon alkanes and ethylbenzene

Journal Article

Catalytic combustion of methane over a highly active and stable NiO/CeO

Xiuhui Huang, Junfeng Li, Jun Wang, Zeqiu Li, Jiayin Xu

Journal Article

Influence of site conditions on seismic design parameters for foundations as determined via nonlinearsite response analysis

Muhammad Tariq A. CHAUDHARY

Journal Article

Tuning of the active phase structure and hydrofining performance of alumina-supported tri-metallic WMoNi

Shufeng Shan, Haiyan Liu, Gang Shi, Xiaojun Bao

Journal Article

Microemulsion-mediated hydrothermal synthesis of flower-like MoS

Yuxia Jiang, Donge Wang, Zhendong Pan, Huaijun Ma, Min Li, Jiahe Li, Anda Zheng, Guang Lv, Zhijian Tian

Journal Article

Development and application of an off-site maintenance system in the petrochemical industry

Ruisheng YONG, Yanbing YE, Hanbin LUO, Lieyun DING

Journal Article

behavior of Co3O4 on HZSM-5 support: designing applicable catalysts for selective catalytic

Journal Article

Discussion on the Origin of Deep-fissure Zones at theSite of Pusiluo Dam，Yalongjiang River

Li Ping,Li Yuanjun,Yang Meie,Zhao Dongzhi

Journal Article

An integrated approach to site-specific management zone delineation

Yuxin MIAO, David J. MULLA, Pierre C. ROBERT

Journal Article

Site-directed mutagenesis of long QT syndrome KCNQ1 gene

LI Wei, WANG Bin, XU Qiumei, KE Qinmei, YANG Junguo, DU Rong, TIAN Li, WANG Qing

Journal Article

Construction Technology of Off-Site Precast Concrete Buildings

Ting Gong,Jian Yang,Hao Hu,Feng Xu

Journal Article

Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD, Pedram Haidarzaeh AZAR

Journal Article

A review on catalytic & non-catalytic bio-oil upgrading in supercritical fluids

Sainab Omar, Yang Yang, Jiawei Wang

Journal Article