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Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor

Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 461-471 doi: 10.1007/s11705-010-0517-6

Abstract: The recent studies of direct alcohol/ether synthesis process in slurry reactors were reviewed, and theresearch work in our laboratory was carried out in this paper. a global kinetics model for direct dimethylether (DME) synthesis from syngas over a novel Cu-Zn-Al-Zr slurry catalyst was established accordingThe optimal operating conditions for DME synthesis process were obtained: reaction temperature at 240

Keywords： syngas     alcohol/ether fuel     slurry catalyst     bubble column slurry reactor     global kinetics     mathematical model    

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Direct synthesis of dimethyl carbonate over rare earth oxide supported catalyst

JIANG Qi, CHENG Jiye, GAO Zhiqin

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 300-303 doi: 10.1007/s11705-007-0055-z

Abstract: Solid base catalysts for the direct synthesis of dimethyl carbonate (DMC) from carbon dioxide, methanol

Keywords： thermogravimetric analysis     increase     KCl-KCO/NdO     catalytic     KCl-KCO/YO    

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Direct synthesis of carbon nanotubes on fly ash particles to produce carbon nanotubes/fly ash composites

Fangxian LI, Cheng ZHOU, Pengfei YANG, Beihan WANG, Jie HU, Jiangxiong WEI, Qijun YU

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1405-1414 doi: 10.1007/s11709-019-0564-0

Abstract: Fly ash was used as catalytic support for carbon nanotubes (CNTs) growth by chemical vapor deposition (CVD) due to having ideal compositions (SiO , Al O , and Fe O ). In this paper, CNTs were synthesized on Ni catalyst/fly ash substrate using CVD method. The influence of parameters (e.g., reaction temperature and gas flow rate) on the carbon yield and structure of the resulting CNTs was on the carbon yield and structure of the resulting CNTs was investigated by thermo-gravimetric analyses, Scanning electron microscopy, and Raman spectroscopy analysis. The results indicated that the growth temperature controlling had a significant effect on the diameter of CNTs. And the proper acetylene and hydrogen flow rate would decrease in defect density and increase in yield of as-grown CNTs on fly ash. Finally, the amorphous carbon on the surface of as-grown CNTs were removed by heating in air. Experimental results showed that the hydrophobic of the annealed CNTs was weak due to introducing functional groups to the surface of CNTs.

Keywords： carbon nanotubes     fly ash     chemical vapor deposition     parameters     purification    

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Direct synthesis of diphenyl carbonate over heterogeneous catalyst: effects of structure of substituted

WU Guangwen, JIN Fang, WU Yuxin, ZHANG Guangxu, LI Dinghuo, WANG Cunwen, MA Peisheng

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 59-64 doi: 10.1007/s11705-007-0012-x

Abstract: Active component Pd was loaded on various perovskite supports for synthesis of diphenyl carbonate.

Keywords： photoelectron spectroscopy     diphenyl carbonate     proportion     diffraction     perovskite    

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Synthesis and characterization of magnesium hydroxide by batch reaction crystallization

Xingfu SONG, Shuying SUN, Dengke ZHANG, Jin WANG, Jianguo YU

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 416-421 doi: 10.1007/s11705-011-1125-9

Abstract: Magnesium hydroxide with high purity and uniform particle size distribution was synthesized by the directThe effects of synthesis conditions on the particle size distribution and water content (filtration cakeThis simple and mild synthesis method was promising to be scaled up for the industrial production of

Keywords： magnesium hydroxide     direct precipitation method     industrial crystallization     particle size distribution    

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A study on the catalytic performance of Pd/γ-Al

Ruizhi CHU, Xianyong WEI, Zhimin ZONG, Wenjia ZHAO

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 452-456 doi: 10.1007/s11705-010-0522-9

Abstract: The catalysts were used for direct synthesis of dimethylether (DME) from syngas.calcination under microwave irradiation improved both the activity and selectivity of the catalysts for DME synthesis

Keywords： Pd/γ-Al2O3     direct synthesis     dimethyl ether     calcination under microwave irradiation    

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Additive direct-write microfabrication for MEMS: A review

Kwok Siong TEH

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 4,   Pages 490-509 doi: 10.1007/s11465-017-0484-4

Abstract:

Direct-write additive manufacturing refers to a rich and growing repertoire of well-established fabricationAt the macroscale, direct-write techniques such as stereolithography, selective laser sintering, fusedThe technological premises of all direct-write additive manufacturing are identical—convertingWhile still at its infancy, direct-write additive manufacturing techniques at the microscale have theWith current direct-write additive manufacturing technologies, it is possible to fabricate unsophisticated

Keywords： direct-write     additive manufacturing     microfabrication     MEMS    

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Regulation of radicals by hydrogen-donor solvent in direct coal liquefaction

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1689-1699 doi: 10.1007/s11705-022-2186-7

Abstract: Radicals are important intermediates in direct coal liquefaction.

Keywords： direct coal liquefaction     hydrogen-donor solvent     induced pyrolysis     radical mechanism     density functional    

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Direct acting antiviral-induced dynamic reduction of serum

Tung Huynh, Ke-Qin Hu

Frontiers of Medicine 2019, Volume 13, Issue 6,   Pages 658-666 doi: 10.1007/s11684-019-0707-7

Abstract: Direct acting antiviral (DAA) treatments may reduce the elevated α fetoprotein (AFP), but data on how

Keywords： chronic hepatitis C     α fetoprotein     direct acting antiviral treatment     cirrhosis    

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract:

Researchers have investigated direct drive valve for many years to solve problems, such as fluid forceThis paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novel

Keywords： direct drive rotary valve     computational fluid dynamics (CFD)     flow regulation    

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Direct energy rebound effect for road transportation in China

Frontiers of Engineering Management   Pages 597-611 doi: 10.1007/s42524-023-0276-y

Abstract: The enhancement of energy efficiency stands as the principal avenue for attaining energy conservation and emissions reduction objectives within the realm of road transportation. Nevertheless, it is imperative to acknowledge that these objectives may, in part or in entirety, be offset by the phenomenon known as the energy rebound effect (ERE). To quantify the long-term EREs and short-term EREs specific to China’s road transportation, this study employed panel cointegration and panel error correction models, accounting for asymmetric price effects. The findings reveal the following: The long-term EREs observed in road passenger transportation and road freight transportation range from 13% to 25% and 14% to 48%, respectively; in contrast, the short-term EREs in road passenger transportation and road freight transportation span from 36% to 41% and 3.9% to 32%, respectively. It is noteworthy that the EREs associated with road passenger transportation and road freight transportation represent a partial rebound effect, falling short of reaching the magnitude of a counterproductive backfire effect. This leads to the inference that the upsurge in energy consumption within the road transportation sector cannot be solely attributed to advancements in energy efficiency. Instead, various factors, including income levels, the scale of commodity trade, and industrial structure, exert more substantial facilitating influences. Furthermore, the escalation of fuel prices fails to dampen the demand for energy services, whether in the domain of road passenger transportation or road freight transportation. In light of these conclusions, recommendations are proffered for the formulation of energy efficiency policies pertinent to road transportation.

Keywords： road transportation     direct energy rebound effect     asymmetric price effects     panel data model    

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Effect of light scattering on the performance of a direct absorption solar collector

Kwang Hyun WON, Bong Jae LEE

Frontiers in Energy 2018, Volume 12, Issue 1,   Pages 169-177 doi: 10.1007/s11708-018-0527-5

Abstract: The collector efficiency of a direct absorption solar collector (DASC) is very sensitive to optical properties

Keywords： direct absorption solar collector     plasmonic nanofluid     light scattering    

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An Effective Method for Improving Silicon Micro-resonator System Performance

Xia Dunzhu,Wang Shourong,Zhou Bailing

Strategic Study of CAE 2006, Volume 8, Issue 10,   Pages 71-74

Abstract:

The working principle of silicon micro-resonator system was firstly introduced. An intelligence silicon micro-resonator system design and realization was presented in focus. Its two step working flows for roughness and fineness searching and digital interface technology were analyzed in detail. Combined with experimental data and sweeping curve, two different searching results came out under different vacuum circumstance and its working performance was well evaluated.

Keywords： direct digital synthesis (DDS)     silicon micro-resonator     AD9954     digital signal processing    

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Comparative study of various artificial intelligence approaches applied to direct torque control of induction

Moulay Rachid DOUIRI, Mohamed CHERKAOUI

Frontiers in Energy 2013, Volume 7, Issue 4,   Pages 456-467 doi: 10.1007/s11708-013-0264-8

Abstract: In this paper, three intelligent approaches were proposed, applied to direct torque control (DTC) ofresults obtained demonstrate the feasibility of the adaptive network-based fuzzy inference system based directCompared with the classical direct torque control, fuzzy logic based direct torque control (FL-DTC),and neural networks based direct torque control (NN-DTC), the proposed ANFIS-based scheme optimizes the

Keywords： adaptive neuro-fuzzy inference system (ANFIS)     artificial neural network     direct torque control (DTC)     fuzzy    

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Biosorption of Direct Black 38 by dried anaerobic granular sludge

WANG Xuejiang, XIA Siqing, ZHAO Jianfu

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 198-202 doi: 10.1007/s11783-008-0031-y

Abstract: The biosorption of Direct Black 38 by dried anaerobic granular sludge in a batch system under specificequilibrium data fit very well with both Langmuir and Freundlich models in the concentration range of DirectThe adsorption parameters show that the adsorption of Direct Black 38 is an endothermic and more effectiveThis suggests that the adsorption of Direct Black 38 by dried anaerobic granular sludge is chemically

Keywords： Langmuir     kJ/mol     temperature     removal     Freundlich    

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Title Author Date Type Operation

Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor

Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG

Journal Article

Direct synthesis of dimethyl carbonate over rare earth oxide supported catalyst

JIANG Qi, CHENG Jiye, GAO Zhiqin

Journal Article

Direct synthesis of carbon nanotubes on fly ash particles to produce carbon nanotubes/fly ash composites

Fangxian LI, Cheng ZHOU, Pengfei YANG, Beihan WANG, Jie HU, Jiangxiong WEI, Qijun YU

Journal Article

Direct synthesis of diphenyl carbonate over heterogeneous catalyst: effects of structure of substituted

WU Guangwen, JIN Fang, WU Yuxin, ZHANG Guangxu, LI Dinghuo, WANG Cunwen, MA Peisheng

Journal Article

Synthesis and characterization of magnesium hydroxide by batch reaction crystallization

Xingfu SONG, Shuying SUN, Dengke ZHANG, Jin WANG, Jianguo YU

Journal Article

A study on the catalytic performance of Pd/γ-Al

Ruizhi CHU, Xianyong WEI, Zhimin ZONG, Wenjia ZHAO

Journal Article

Additive direct-write microfabrication for MEMS: A review

Kwok Siong TEH

Journal Article

Regulation of radicals by hydrogen-donor solvent in direct coal liquefaction

Journal Article

Direct acting antiviral-induced dynamic reduction of serum

Tung Huynh, Ke-Qin Hu

Journal Article

Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Journal Article

Direct energy rebound effect for road transportation in China

Journal Article

Effect of light scattering on the performance of a direct absorption solar collector

Kwang Hyun WON, Bong Jae LEE

Journal Article

An Effective Method for Improving Silicon Micro-resonator System Performance

Xia Dunzhu,Wang Shourong,Zhou Bailing

Journal Article

Comparative study of various artificial intelligence approaches applied to direct torque control of induction

Moulay Rachid DOUIRI, Mohamed CHERKAOUI

Journal Article

Biosorption of Direct Black 38 by dried anaerobic granular sludge

WANG Xuejiang, XIA Siqing, ZHAO Jianfu

Journal Article