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Enhancing the aromatic selectivity of cyclohexane aromatization by CO2sub> coupling

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11, Pages 1801-1808 doi: 10.1007/s11705-023-2325-9

Abstract: Herein, CO2sub> is introduced into the cyclohexane conversion process on the HZSM-5 zeolite, whichcan improve the aromatic selectivity.sub>) selectivity of 48.2% can be obtained at the conditions of 2.7 MPa (CO2sub>), 450 °C, and1.7 h⁻¹, which is better than that without CO2sub> (aromatic selectivity = 43.2%).>2sub>.

Keywords： aromatics carbon dioxide aromatization coupling reaction ZSM-5 zeolite

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The modification of titanium in mesoporous silica for Co-based Fischer–Tropsch catalysts

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 8, Pages 1224-1236 doi: 10.1007/s11705-022-2139-1

Abstract: However, the increased titanium content inevitably resulted in the formation of anatase TiO 2subThe enhanced metal-support interactions were beneficial for the CO/H2sub> ratio at the activecobalt sites, which facilitated the formation of more C5+sub> hydrocarbons.

Keywords： Fischer–Tropsch synthesis titanium incorporation mesoporous silica metal-support interactions C5+sub> selectivity

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An investigation of the CHOH and CO selectivity of CO hydrogenation over Cu–Ce–Zr catalysts

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6, Pages 950-962 doi: 10.1007/s11705-022-2162-2

Abstract: 2sub> to CO/CH3sub>OH products.The Cu–Ce–Zr catalyst with 2 wt% Ce loading shows higher CO selectivity (SCOsub> = 0.0%>3sub>OH selectivity (

Keywords： CO2sub> hydrogenation Cu–Ce–Zr hydroxyls CO/CH3sub>OH selectivity

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Tuning the catalytic selectivity in electrochemical CO

Jiafang XIE,Yuxi HUANG,Hanqing YU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5, Pages 861-866 doi: 10.1007/s11783-014-0742-1

Abstract: However, electrocatalysts for this reaction usually suffer from a poor product selectivity and a largeHere we report that tunable catalytic selectivity for hydrocarbon formation could be achieved on Cu nanomaterials

Keywords： electrochemical CO2sub> reduction Cu oxide nanostructure selectivity hydrocarbon formation

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Adsorption selectivity of salicylic acid and 5-sulfosalicylic acid onto hypercrosslinked polymeric adsorbents

LIU Fuqiang, CHEN Jinlong, LI Aimin, XIA Mingfang, FEI Zhenghao

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1, Pages 73-78 doi: 10.1007/s11783-007-0014-4

Abstract: experiments involving different solutes and sorbents were carried out to investigate the adsorption selectivityand separation performance of salicylic acid and 5-sulfosalicylic acid.Comparatively, the adsorption capacity of 5-sulfosalicylic acid decreased on both resins with salicylicIn conclusion, the adsorption selectivity of salicylic acid onto NDA-100 was obviously larger than thatonto NDA-99 with the existence of 5-sulfosalicylic acid in the adsorptive environment.

Keywords： 5-sulfosalicylic bottle-point hypercrosslinked polymeric satisfactory separation NDA-100

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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: Notably, the optimized 10Fe-8Cu/TiO2sub> catalyst exhibited exceptional catalytic performancein converting NO to NH3sub>, achieving an NO conversion rate exceeding 80% and an NH3sub> selectivity exceeding 98% at atmospheric pressure and 350 °C.demonstrate that Cu doping enhances the rate-limiting hydrogenation step and lowers the energy barrier for NH3sub> desorption, thereby resulting in improved NO conversion and enhanced selectivity toward ammonia

Keywords： NO hydrogenation synthetic ammonia 10Fe-xCu/TiO2sub> high selectivity

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On the monolayer dispersion behavior of Co3sub>O4sub> on HZSM-5 support: designing applicable

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

Abstract: Based on monolayer dispersion theory, Co3sub>O4sub>/ZSM-5 catalysts with different loadingsCo3sub>O4sub> can spontaneously disperse on HZSM-5 support with a monolayer dispersionreaction performance. 4% Co3sub>O4sub>/ZSM-5, the catalyst close to the monolayer dispersionIt is proposed the optimal Co3sub>O4sub>/ZSM-5 catalyst can be prepared by loading thecapacity amount of Co3sub>O4sub> onto HZSM-5 support.

Keywords： Co3sub>O4sub>/ZSM-5 NOxsub>-SCR by NH3sub> monolayer dispersionthreshold effect surface acid sites surface active O2sub>^– anions

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The effect of doping and steam treatment on the catalytic activities of nano-scale H-ZSM-5 in the methanol

Baodong Song, Yongqiang Li, Gang Cao, Zhenhai Sun, Xu Han

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4, Pages 564-574 doi: 10.1007/s11705-017-1654-y

Abstract: In the transformation of methanol to gasoline (MTG), the selectivity to gasoline and the aromatic contentThe catalytic activities of steam-treated and non-steam-treated nano-scale H-ZSM-5 (NHZ5) catalysts impregnatedThe NH -TPD results showed that after impregnation, the Ag/NHZ5, Zn/NHZ5 and P/NHZ5 catalysts containedAfter 6 h of MTG reaction, the selectivity to gasoline for the steam-treated catalysts, , and were

Keywords： MTG nano-scale H-ZSM-5 steam treatment gasoline selectivity to gasoline

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Effects of ancillary ligands in acceptorless benzyl alcohol dehydrogenation mediated by phosphine-free cobalt complexes

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3, Pages 314-325 doi: 10.1007/s11705-022-2219-2

Abstract: Herein, we synthesized a phosphine-free η⁵-C5sub>Me5sub>-Co complex by usingThe improved performance among the class of η⁵-C5sub>Me5sub>-Co complexes could/sup>-C5sub>Me5sub>-Co complexes by a set of characterizations.>5sub>Me5sub>-Co moiety.The electron population demonstrated that the η⁵-C5sub>Me5sub> ligand played

Keywords： acceptorless alcohol dehydrogenation η⁵-C5sub>Me5sub>-Co metal–ligand cooperation

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Facile controlled synthesis of hierarchically structured mesoporous Li4Ti5O12/C/rGO composites as high-performance

Cehuang FU, Shuiyun SHEN, Ruofei WU, Xiaohui YAN, Guofeng XIA, Junliang ZHANG

Frontiers in Energy 2022, Volume 16, Issue 4, Pages 607-612 doi: 10.1007/s11708-021-0798-0

Abstract: In this paper, a facile strategy is proposed to controllably synthesize mesoporous Li4sub>Ti5sub>O12sub>/C nanocomposite embedded in graphene matrix as lithium-ion battery anode via theco-assembly of Li4sub>Ti5sub>O12sub> (LTO) precursor, GO, and phenolic resin.

Keywords： Li4sub>Ti5sub>O12sub> phenolic-resin-based carbon mesoporous composite graphene

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Physical and chemical processes of wintertime secondary nitrate aerosol formation

Qi YING

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3, Pages 348-361 doi: 10.1007/s11783-011-0343-1

Abstract: The UCD/CIT model was modified to include a process analysis (PA) scheme for gas and particulate matter (PM) to study the formation of secondary nitrate aerosol during a stagnant wintertime air pollution episode during the California Regional PM /PM Air Quality Study (CRPAQS) where detailed measurements of PM components are available at a few sites. Secondary nitrate is formed in the urban areas from near the ground to a few hundred meters above the surface during the day with a maximum modeled net increase rate of 4 μg·m ·d during the study episode. The secondary nitrate formation rate in rural areas is lower due to lower NO . In the afternoon hours, near-surface temperature can be high enough to evaporate the particulate nitrate. In the nighttime hours, both the gas phase N O reactions with water vapor and the N O heterogeneous reactions with particle-bound water are important for secondary nitrate formation. The N O reactions are most import near the surface to a few hundred meters above surface with a maximum modeled net secondary nitrate increase rate of 1 μg·m ·d and are more significant in the rural areas where the O concentrations are high at night. In general, vertical transport during the day moves the nitrate formed near the surface to higher elevations. During the stagnant days, process analysis indicates that the nitrate concentration in the upper air builds up and leads to a net downward flux of nitrate through vertical diffusion and a rapid increase of surface nitrate concentration.

Keywords： secondary nitrate aerosol N2sub>O5sub> heterogeneous reaction process analysis

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CuAlCl

Yixiu WANG,Chao LI,Fanchao MENG,Shuling LV,Jintao GUO,Xiaoqin LIU,Chongqing WANG,Zhengfei MA

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3, Pages 340-345 doi: 10.1007/s11705-014-1438-6

Abstract: The selectivity for CO over N improved from 4.64 to 31.5 at 298 K and 1 bar.

Keywords： metal organic framework CO adsorbent high stability high selectivity CuAlCl4sub>

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Characterization and performance of V

Caiting LI, Qun LI, Pei LU, Huafei CUI, Guangming ZENG

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 2, Pages 156-161 doi: 10.1007/s11783-010-0295-x

Abstract: A series of CeO supported V O catalysts with various loadings were prepared with different calcination temperatures by the incipient impregnation. The catalysts were evaluated for low temperature selective catalytic reduction (SCR) of NO with ammonia (NH ). The effects of O and SO on catalytic activity were also studied. The catalysts were characterized by specific surface areas (S ) and X–ray diffraction (XRD) methods. The experimental results showed that NO conversion changed significantly with the different V O loading and calcination temperature. With the V O loading increasing from 0 to 10 wt%, NO conversion increased significantly, but decreased at higher loading. The optimum calcination temperature was 400°C. The best catalyst yielded above 80% NO conversion in the reaction temperature range of 160°C–300°C. The formation of CeVO on the surface of catalysts caused the decrease of redox ability.

Keywords： V2sub>O5sub>/CeO2sub> catalysts NH3sub>-SCR (selective catalytic reduction

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Chemical deactivation of V

Xiaodong WU, Wenchao YU, Zhichun SI, Duan WENG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3, Pages 420-427 doi: 10.1007/s11783-013-0489-0

Abstract: V O -WO /TiO catalyst was poisoned by impregnation with NH Cl, KOH and KCl solution, respectively. The catalysts were characterized by X-ray diffraction (XRD), inductively coupled plasma (ICP), N physisorption, Raman, UV-vis, NH adsorption, temperature-programmed reduction of hydrogen (H -TPR), temperature-programmed oxidation of ammonia (NH -TPO) and selective catalytic reduction of NO with ammonia (NH -SCR). The deactivation effects of poisoning agents follow the sequence of KCl>KOH>>NH Cl. The addition of ammonia chloride enlarges the pore size of the titania support, and promotes the formation of highly dispersed V=O vanadyl which improves the oxidation of ammonia and the high-temperature SCR activity. K ions are suggested to interact with vanadium and tungsten species chemically, resulting in a poor redox property of catalyst. More importantly, potassium can reduce the Br?nsted acidity of catalysts and decrease the stability of Br?nsted acid sites significantly. The more severe deactivation of the KCl-treated catalyst can be mainly ascribed to the higher amount of potassium resided on catalyst.

Keywords： V2sub>O5sub>-WO3sub>/TiO2sub> potassium chloride poisoning reducibility acid

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High purity Mn

Xiaoqiang SHAN, Fenghua GUO, Wenqian XU, Xiaowei TENG

Frontiers in Energy 2017, Volume 11, Issue 3, Pages 383-400 doi: 10.1007/s11708-017-0485-3

Abstract: Developing electrodes with high specific energy by using inexpensive manganese oxides is of great importance for aqueous electrochemical energy storage (EES) using non-Li charge carriers such as Na-or K-ions. However, the energy density of aqueous EES devices is generally limited by their narrow thermodynamic potential window (~1.23 V). In this paper, the synthesis of high purity layered Mn O nanoparticles through solid state thermal treatment of Mn O spinel nanoparticles, resulting in a chemical formula of [Mn ][Mn O ], evidenced by Rietveld refinement of synchrotron-based X-ray diffraction, has been reported. The electro-kinetic analyses obtained from cyclic voltammetry measurements in half-cells have demonstrated that Mn O electrode has a large overpotential (~ 0.6 V) towards gas evolution reactions, resulting in a stable potential window of 2.5 V in an aqueous electrolyte in half-cell measurements. Symmetric full-cells fabricated using Mn O electrodes can be operated within a stable 3.0 V potential window for 5000 galvanostatic cycles, exhibiting a stable electrode capacity of about 103 mAh/g at a C-rate of 95 with nearly 100% coulombic efficiency and 96% energy efficiency.

Keywords： manganese oxides Mn5sub>O8sub> high voltage aqueous Na-ion storage

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Title Author Date Type Operation

Enhancing the aromatic selectivity of cyclohexane aromatization by CO2sub> coupling

Journal Article

The modification of titanium in mesoporous silica for Co-based Fischer–Tropsch catalysts

Journal Article

An investigation of the CHOH and CO selectivity of CO hydrogenation over Cu–Ce–Zr catalysts

Journal Article

Tuning the catalytic selectivity in electrochemical CO

Jiafang XIE,Yuxi HUANG,Hanqing YU

Journal Article

Adsorption selectivity of salicylic acid and 5-sulfosalicylic acid onto hypercrosslinked polymeric adsorbents

LIU Fuqiang, CHEN Jinlong, LI Aimin, XIA Mingfang, FEI Zhenghao

Journal Article

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

Journal Article

On the monolayer dispersion behavior of Co3sub>O4sub> on HZSM-5 support: designing applicable

Journal Article

The effect of doping and steam treatment on the catalytic activities of nano-scale H-ZSM-5 in the methanol

Baodong Song, Yongqiang Li, Gang Cao, Zhenhai Sun, Xu Han

Journal Article

Effects of ancillary ligands in acceptorless benzyl alcohol dehydrogenation mediated by phosphine-free cobalt complexes

Journal Article

Facile controlled synthesis of hierarchically structured mesoporous Li4Ti5O12/C/rGO composites as high-performance

Cehuang FU, Shuiyun SHEN, Ruofei WU, Xiaohui YAN, Guofeng XIA, Junliang ZHANG

Journal Article

Physical and chemical processes of wintertime secondary nitrate aerosol formation

Qi YING

Journal Article

CuAlCl

Yixiu WANG,Chao LI,Fanchao MENG,Shuling LV,Jintao GUO,Xiaoqin LIU,Chongqing WANG,Zhengfei MA

Journal Article

Characterization and performance of V

Caiting LI, Qun LI, Pei LU, Huafei CUI, Guangming ZENG

Journal Article

Chemical deactivation of V

Xiaodong WU, Wenchao YU, Zhichun SI, Duan WENG

Journal Article

High purity Mn

Xiaoqiang SHAN, Fenghua GUO, Wenqian XU, Xiaowei TENG

Journal Article

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