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Temperature effect on carbothermal reduction and nitridation synthesis of silicon nitride

Wan Xiaohan,Zhang Guangqing,Oleg Ostrovski and Hal Aral

Strategic Study of CAE 2015, Volume 17, Issue 1,   Pages 62-66

Abstract:

Carbothermal reduction and nitridation synthesis of silicon nitride was conducted at 1 300～1 600 ℃The reduction rate increased with increasing temperature， but slowed down when temperature was higherDue to the small difference of the equilibrium CO partial pressure between Si3N4 and SiC formation， theboundary temperature was not obvious.The mechanism of carbothermal reduction/nitridation synthesis of silicon nitride needs further investigation

Keywords： carbothermal reduction and nitridation； boundary temperature； selectivity of products； equilibrium COpartial pressure    

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“Partial pressures” of humid air in wide pressure and temperature ranges

Zidong WANG, Hanping CHEN, Shilie WENG

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 511-517 doi: 10.1007/s11708-013-0281-7

Abstract: “Partial pressure” in humid air is a question very much concerned by scientists and no satisfactory answerpressure law.The fundamental behaviors of water vapor and dry air are studied in depth in wide pressure and temperatureOne discovery is that the “partial pressure” of the water vapor in saturated humid air equals , rather“cutting-off temperature” for unsaturated humid air.

Keywords： partial pressure     Dalton’s partial pressure law     humid air     saturated     unsaturated    

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Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 209-225 doi: 10.1007/s11705-017-1688-1

Abstract: ., CO ) in the stream to be treated, traditional purification processes may be too energy intensive andIn this work, a new process for the purification of natural gas based on a low temperature distillation

Keywords： CO2 capture     innovative process     cryogenic distillation     dynamic simulation     solid-liquid-vaporequilibrium    

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Electrochemical CO reduction to C products over CuZn intermetallic catalysts synthesized by electrodeposition

Frontiers in Energy doi: 10.1007/s11708-023-0898-0

Abstract: Electrocatalytic CO2 reduction (ECR) offers an attractive approach to realizing carbon neutralityand producing valuable chemicals and fuels using CO2 as the feedstock.Herein, a one-step co-electrodeposition method was used to introduce Zn, a metal with weak *CO bindingMoreover, the *CO formed on Zn sites can move to Cu sites due to its weak binding with *CO, and thusenhance the C–C coupling on the Cu surface to form C2+ products.

Keywords： carbon dioxide electroreduction     electrochemistry     co-electrodeposition     intermetallic catalysts     value-added    

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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: Electrochemical conversion of CO to hydrocarbons can relieve both environmental and energy stresses.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 nanomaterialswork provides a facile synthetic strategy for preparing Cu-based nanomaterials to achieve selective COreduction.

Keywords： electrochemical CO2 reduction     Cu oxide     nanostructure     selectivity     hydrocarbon formation    

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Effects of pressure and temperature on fixed-site carrier membrane for CO 2 separation from natural gas

Meng WANG, Dongxiao YANG, Zhi WANG, Jixiao WANG, Shichang WANG,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 2,   Pages 127-132 doi: 10.1007/s11705-009-0231-4

Abstract: In this paper, the effect of testing temperature on the performance of fixed carrier membrane for COThe results showed that both the permeances of CO and CH decreased with the increase of temperature,and the permeances decreased more quickly under low pressure than those under high pressure.At the feed pressure of 0.11MPa, the CO/ CH selectivity of PEI-PVA/PS blend composite membraneUnder the feed pressure of 0.21MPa, as well as 1.11MPa, the selectivity decreased with

Keywords： temperature increment     high pressure     permselectivity     separation performance     temperature    

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Reduction kinetics of SrFeO/CaO∙MnO nanocomposite as effective oxygen carrier for chemical looping partial

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1726-1734 doi: 10.1007/s11705-022-2188-5

Abstract: In this work, the kinetics of SrFeO3−δ–CaO∙MnO nanocomposite reduction by methane wasDuring the methane reduction, combustion occurs before the partial oxidation and there exists a transitiontemperature increased.the A3 model and a methane pressure-dependent term represented by a power law.The partial oxidation is half order with respect to methane pressure.

Keywords： chemical looping reforming     SrFeO3−δ/CaO·MnO nanocomposite     reduction kinetics     Avrami–Erofeyevmodel     pressure-dependent term    

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Selective oxidation of o -nitrotoluene to o -nitrobenzaldehyde with metalloporphyrins as biomimetic catalysts

Xinling WANG, Yuanbin SHE,

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 4,   Pages 453-456 doi: 10.1007/s11705-009-0167-8

Abstract: peripheral substituent around porphyrin rings and various process parameters of NaOH concentration, reaction temperature, reaction time and oxygen pressure all affect the selectivity of -nitrobenzaldehyde.Further, 82.0% selectivity of -nitrobenzaldehyde was achieved under the optimum conditions: 1.0×

Keywords： -nitrobenzaldehyde     temperature     biomimetic     selectivity     pressure    

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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: 2 to CO/CH3OH products.The Cu–Ce–Zr catalyst with 2 wt% Ce loading shows higher CO selectivity (SCO = 0.0%mml:mn> = 5.4%–15.6%) and CH3OH selectivityHence, the Cu–Ce–Zr catalyst with 8 wt% Ce loading favors CH3OH selectivity and CO2pressure in situ diffuse reflectance infrared Fourier transform spectroscopy shows

Keywords： CO2 hydrogenation     Cu–Ce–Zr     hydroxyls     CO/CH3OH selectivity    

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Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1480-1493 doi: 10.1007/s11709-021-0776-y

Abstract: This paper proposes a general analytical method to evaluate the seismic active earth pressure on a retainingwall with backfill subjected to partial steady seepage flow under seismic conditions.total head, ii) upper bound solution of seismic active earth thrust, and iii) deduction for the earth pressurerelies on the Fourier series expansions, and the expressions of the seismic active earth thrust and pressurereveal that insufficient drainage and earthquakes are crucial factors that cause unfavorable earth pressure

Keywords： seismic active earth pressure     partial seepage flow     pore pressure     anisotropy     upper bound theorem    

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Chemically reactive solute transfer in a boundary layer slip flow along a stretching cylinder

Swati Mukhopadhyay

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 385-391 doi: 10.1007/s11705-011-1101-4

Abstract: the distribution of a solute undergoing a first order chemical reaction in an axisymmetric laminar boundaryVelocity slip condition at the boundary is used instead of no-slip condition.Similarity transformations are used to convert the partial differential equations corresponding to momentum

Keywords： boundary layer     stretching cylinder     partial slip     mass transfer     similarity solution    

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NiBO (B = Mn or Co) catalysts for NH-SCR of NO at low-temperature in microwave field

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1696-y

Abstract:

● Microwave-assisted catalytic NH3-SCR reaction over spinel oxides is carried out.

Keywords： Microwave field     Spinel oxides     NOx     Selective catalytic reduction    

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Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

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

Abstract: Herein, CO2 is introduced into the cyclohexane conversion process on the HZSM-5 zeolite, whichcan improve the aromatic selectivity.of 48.2% can be obtained at the conditions of 2.7 MPa (CO2), 450 °C, and 1.7 h−1, which is better than that without CO2 (aromatic selectivity = 43.2%).13C isotope labeling experimental results demonstrate that CO2 can enter into the

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

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Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 8-14 doi: 10.1007/s11783-008-0030-z

Abstract: Temperature is the determining factor of pyrolysis, which is one of the alternative technologies forThe effects of final operating temperature ranging from 350 to 550°C on pyrolysis products of oil sludgeWith an increase of temperature, the mass fraction of solid residues, liquids, and gases in the finalfrom solid to liquid and gas phase (especially to liquid phase) during the process, and the optimum temperature

Keywords： sludge treatment     corresponding     Temperature     liquid     process    

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Effects of MgO promoter on properties of Ni/Al2O3 catalysts for partial oxidation of methane to syngas

QIU Yejun, CHEN Jixiang, ZHANG Jiyan

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 167-171 doi: 10.1007/s11705-007-0031-7

Abstract: MgO promoter on the physico-chemical properties and catalytic performance of Ni/AlO catalysts for the partialpromoter, the nickel dispersiveness was enhanced, therefore making their catalytic performance in methane partialMeanwhile, the basicity of MgO promoted the reversed water gas shift reaction, which led to an increase in COselectivity and a decrease in H2 selectivity.

Keywords： excessive     selectivity     decrease     dispersiveness     physico-chemical    

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Title Author Date Type Operation

Temperature effect on carbothermal reduction and nitridation synthesis of silicon nitride

Wan Xiaohan,Zhang Guangqing,Oleg Ostrovski and Hal Aral

Journal Article

“Partial pressures” of humid air in wide pressure and temperature ranges

Zidong WANG, Hanping CHEN, Shilie WENG

Journal Article

Study of the robustness of a low-temperature dual-pressure process for removal of CO

Stefania Moioli, Laura A. Pellegrini, Paolo Vergani, Fabio Brignoli

Journal Article

Electrochemical CO reduction to C products over CuZn intermetallic catalysts synthesized by electrodeposition

Journal Article

Tuning the catalytic selectivity in electrochemical CO

Jiafang XIE,Yuxi HUANG,Hanqing YU

Journal Article

Effects of pressure and temperature on fixed-site carrier membrane for CO 2 separation from natural gas

Meng WANG, Dongxiao YANG, Zhi WANG, Jixiao WANG, Shichang WANG,

Journal Article

Reduction kinetics of SrFeO/CaO∙MnO nanocomposite as effective oxygen carrier for chemical looping partial

Journal Article

Selective oxidation of o -nitrotoluene to o -nitrobenzaldehyde with metalloporphyrins as biomimetic catalysts

Xinling WANG, Yuanbin SHE,

Journal Article

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

Journal Article

Upper bound solution to seismic active earth pressure of submerged backfill subjected to partial drainage

Journal Article

Chemically reactive solute transfer in a boundary layer slip flow along a stretching cylinder

Swati Mukhopadhyay

Journal Article

NiBO (B = Mn or Co) catalysts for NH-SCR of NO at low-temperature in microwave field

Journal Article

Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Journal Article

Effects of temperature on pyrolysis products of oil sludge

LIU Jianguo, SONG Wei, NIE Yongfeng

Journal Article

Effects of MgO promoter on properties of Ni/Al2O3 catalysts for partial oxidation of methane to syngas

QIU Yejun, CHEN Jixiang, ZHANG Jiyan

Journal Article