Chinese︱Feedback︱Save this page

Login︱Register

• Elaborating Academic Views 　　　　 • Exchanging Innovative Ideas
• Protecting Intellectual Properties 　　• Fast Sharing Science Papers

Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China

Home > Papers > Chemical-Reaction-Engineering

There are 21 papers published in subject: > since this site started.

Results per page:

21 Total, 3 Pages | 1 2 3 Next > Last >>

Select Subject

All (8830)

Agronomy (158)

Animal Husbandry,... (64)

Aquatic Science (16)

Astronomy (36)

Aviation (22)

Basic Medicine (184)

Biology (504)

Chemical Engineering (103)

Chemistry (635)

Civil and Archite... (105)

Clinical Medicine (236)

Computer Science ... (924)

Dynamic and Elect... (121)

Earth Science (119)

Economics (67)

Education (31)

Electrics, Commun... (927)

Energy Science an... (67)

Engineering and T... (15)

Environmental Sci... (140)

Food Science and ... (63)

Forestry (36)

Hydraulic Enginee... (40)

Mechanics (240)

Metallurgical Eng... (32)

Mine Engineering ... (38)

Nuclear Science a... (21)

Pharmacy (98)

Physics (920)

Preventive Medici... (37)

Psychology (20)

Security Science ... (17)

Sports Science (6)

Surveying and Map... (15)

Textile Science a... (16)

Traditional Chine... (56)

Transportation En... (57)

Third-level Subject

Biochemical Reaction Engi...(0)
Catalyst Project(6)
Catalytic Reaction Engine...(2)
Chemical Polymerization R...(0)
Electrochemical reaction ...(0)
Fixed Bed Reaction Engine...(0)
Multiphase Flow Reaction ...(2)
Other Subjects of Chemica...(1)

Rank

Results per page:

21 Total, 3 Pages | 1 2 3 Next > Last >>

Alert Name:
Alerting to:
Authentication email will be sent to your email address in 24 hours
Frequency:
Email Message Format:	Plain text Graphical(HTML)

Complete the form below and we will recommend the selected titles to your friends on your behalf. * Indicates a required field.
Your name*:
Your email address*:
Recipient's name*:
Recipient's email address*:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find the page(s) useful.

Your name:
Your email address:
Recipient's name:
Recipient's email address:
(multiple recipient's names and email addresses should be separated with semicolons)
Your comments:	I thought you would find this page useful.

Disclaimer: This message was sent to your friend using the "Send it to a friend" facility on the Sciencepaper Online’ WWW site, http://www.paper.edu.cn/en. The Sciencepaper Online is not responsible for the content of this email, and anything said in this email does not necessarily reflect the Sciencepaper Online's views.


	1. Catalyzed synthesis of 2-(4'-ethylbenzoyl)-benzoic acid by supporting Cs2.5H0.5PW12O40 on silica gel
	Guo Dong,Wan Yazhen,Zhang Wenhui,Zhang Yanwu
	Chemical Engineering 03 November 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Supported Cs2.5H0.5PW12O40 were used as the catalyst for Friede-Crafts acylation of phthalic anhydride with ethyl benzene to 2-(4′-ethylbenzoyl)benzoic acid (BEA). The catalysis of silica gel (SG） loaded with different amounts of Cs2.5H0.5PW12O40 (varying 5 wt%-30 wt%) were prepared through a simple and effective impregnation method. The samples were characterized by XRD, FT-IR, BET, Hammett indicator and ammonia adsorption-desorption, and revealed that Cs2.5H0.5PW12O40 dispersed highly on the surface of SG. The catalytic performance of the samples in the synthesis of BEA was also studied. The results indicate that the sample with 10 wt% Cs2.5H0.5PW12O40/SG shows the highest catalytic activity, and the best yield of BEA reached 62.6% when the reaction parameters such as effect of reaction temperature, effect of reaction time, molar ratio of phthalic anhydride to ethyl benzene were under optimized conditions. The reusability tests of the catalysts show that the catalysts can be used several times without significant loss in activity.
	TO cite this article:Guo Dong,Wan Yazhen,Zhang Wenhui, et al. Catalyzed synthesis of 2-(4'-ethylbenzoyl)-benzoic acid by supporting Cs2.5H0.5PW12O40 on silica gel[OL].[ 3 November 2016] http://en.paper.edu.cn/en_releasepaper/content/4706802


	2. Selective Ethylene Oligomerization with Chromium-based Metal-Organic Framework MIL-100 Evacuated under Different Temperatures
	HAN Yang,ZHANG Ying,LIU Suyan,FENG Guangliang,GAO Fei,WANG Hui
	Chemical Engineering 08 October 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:MIL-100(Cr) was synthesized and evacuated under different temperatures to generate a series of Cr-based heterogeneous catalysts for ethylene slurry oligomerization. Their crystal structures, pore properties and metal oxidation states were characterized by XRD, N-adsorption/desorption and XPS techniques. These catalysts showed moderate catalytic activities for ethylene oligomerization but high selectivities to low carbon olefins C6, C8 and C10. Moreover, the oligomer distributions were different depending on the evacuation temperatures. The XPS results showed that the increase of evacuation temperature below 350 oC caused the reduction of some CrIII active sites in the MIL-100(Cr) structure to CrII active sites, which made the catalytic behavior switch from oligomerization to oligomerization plus polymerization activities. The MIL-100(Cr)-250 catalyst evacuated at 250 oC exhibited the largest BET surface area of 2348 m2og-1 and the highest oligomerization and polymerization activities up to 9.27×105 g/(molCroh) and 0.99×105 g/(molCroh) respectively. The main oligomerization products were low carbon olefins C6, C8 and C10. The by-product polymer from MIL-100(Cr)-250 was also characterized in detail by various techniques. It was found that the polymer belonged to linear polyethylene with ultrahigh molecular weight and broad molecular weight distributions. This work demonstrated that MOFs containing coordinatively unsaturated metal sites might be a promising selective catalyst for ethylene slurry oligomerization.
	TO cite this article:HAN Yang,ZHANG Ying,LIU Suyan, et al. Selective Ethylene Oligomerization with Chromium-based Metal-Organic Framework MIL-100 Evacuated under Different Temperatures[OL].[ 8 October 2016] http://en.paper.edu.cn/en_releasepaper/content/4706439

Saved Papers

Saved Papers


	3. Modeling of Liquid Phase Polymerization of Propylene in Loop Reactors
	Yaru Guo,Zhigang Lei,Chengna Dai,Zhanwei Liu,Jianwei Li
	Chemical Engineering 06 May 2016
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:In this paper, a rigorous mathematical model was developed to describe a new-type loop reactor for liquid phase polymerization of propylene since the loop reactor has more economic and technological advantages than conventional stirred tanks. The operation performance of the loop reactor was investigated in this work. The calculated results showed that at a high recycle ratio the distributions of concentrations of propylene, hydrogen and solid, as well as reaction temperature, are uniform along the axial direction of the loop reactor. This means that the loop reactor retains some characteristics of CSTR reactor. Analysis of multiple steady-state was made at different recycle ratio. At a high recycle ratio, three steady-state points were found. But when the heat transfer area decreased to 136 m2 or the cooling water temperature increases to 347 K, only one stable steady-state point would be found. However, at a low recycle ratio, the situation became a little complicated because the number of steady-state points was not always same along the axial direction of loop reactor.
	TO cite this article:Yaru Guo,Zhigang Lei,Chengna Dai, et al. Modeling of Liquid Phase Polymerization of Propylene in Loop Reactors[OL].[ 6 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4686610


	4. Preparation of Ceramic Foams and the Application in Hydrogenation of Commercial Polystyrene
	HAN Kaiyue,ZUO Haoran,ZHU Zhenwei,MENG Chen,GUO Wenze,CAO Guiping
	Chemical Engineering 14 February 2015
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Polystyrene hydrogenation is an important post-polymerization process with good market prospects. However, the traditional powder catalysts are not suitable for industrialized process. In this paper, the macroporous ceramic foams (CFs) were prepared using synthetic template replica method. In order to obtain the ceramic foams with three-dimensional networks and good mechanical properties, a uniform design was carried out to optimize the composition of the slurry and calcining conditions, including the contents of H2O, binder, calcining temperature, heating rate, and calcining time. Effects of the rheological behavior of the slurry on the strength, porosity, and microstructure of the CFs were investigated in details. The obtained ceramic foam catalysts facilitated the separation of catalyst from solution and exhibited good catalytic activity.
	TO cite this article:HAN Kaiyue,ZUO Haoran,ZHU Zhenwei, et al. Preparation of Ceramic Foams and the Application in Hydrogenation of Commercial Polystyrene[OL].[14 February 2015] http://en.paper.edu.cn/en_releasepaper/content/4632382


	5. Confined Synthesis of Silicalite-1 Hollow Spheres with a Lamellar Shell
	CHEN Huiyong
	Chemical Engineering 09 August 2014
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A novel synthesis strategy with integrated using soft/hard templates was proposed for the confined synthesis of silicalite-1 hollow spheres with a lamellar shell. Replicated from macroporous carbon templates and directed by multi-quaternary ammonium surfactants, the silicalite-1 spheres demonstrated unique hollow nanoshell morphology, high crystallinity, and novel hierarchical porosity consisted of hollow macropores, interlamellar mesopores and ordered micropores in zeolites.
	TO cite this article:CHEN Huiyong. Confined Synthesis of Silicalite-1 Hollow Spheres with a Lamellar Shell[J].


	6. Study on the Cu species over chlorine-free CuY catalyst for oxidative carbonylation of methanol to dimethyl carbonate
	Zheng Huayan,Wang Jiazhen,Li Zhong
	Chemical Engineering 17 December 2013
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Three different preparation methods: liquid-phase ion exchange, incipient-wetness- impregnation and the novel method adopted by firstly ion exchange together with Cu(NO3)2- impregnated, are employed to prepare the CuHY catalysts, which are applied in oxidative carbonylation of methanol to dimethyl carbonate (DMC). Characterization of samples by XRD, H2-TPR, DIRFTS of CO adsorption, XPS, AAS and TEM, reveal that the catalyst prepared by liquid-phase ion exchange exhibits low catalytic activity because of the low content of copper and most of Cu species located in the sodalite units or hexagonal prisms, which are difficult to contact with reagent CO and O2. Dispersion of crystalline CuO is the main Cu species of the catalyst prepared by incipient-wetness-impregnation, while 30 percent of Cu2+ of the total amount of Cu is located in the sodalite units or hexagonal prisms, which is not helpful for catalytic activity. However, the catalyst, which is prepared by the novel method, exhibits the remarkable advantages that covers both preparation methods of liquid-phase ion exchange and incipient-wetness-impregnation. This novel method not only obtains CuO species that is beneficial to oxidative carbonylation of methanol to DMC, but also adjusts the location of Cu ions, which makes more Cu2+ locate in the supercages, as a result, Cu2+ can contact with CO and O2. Moreover, Cu2+ located in the supercages have shown the better catalytic performance for oxidative carbonylation compared with CuO species on the surface of the Y zeolites.
	TO cite this article:Zheng Huayan,Wang Jiazhen,Li Zhong. Study on the Cu species over chlorine-free CuY catalyst for oxidative carbonylation of methanol to dimethyl carbonate[OL].[17 December 2013] http://en.paper.edu.cn/en_releasepaper/content/4576209


	7. Determination of Flooding/Loading Transition Using Acoustic Emission Method
	REN Congjing,ZHOU Yefeng,WANG Jingdai,YANG Yongrong
	Chemical Engineering 09 January 2013
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:We obtained the characteristic scale (G1) of the acoustic emission (AE) signals representing the correlations between bubbles and liquid phase in a gas-liquid stirred tank by using multi-scale wavelet transform and R/S analysis. According to the observation that the energy fraction of AE signals in G1 scale changed regularly with the increasing impeller speeds, a method to determine the flooding/loading transition was presented. The critical speed that represents the regime transition, Nf, was associated with the emergence of steady state in AE energy fractions in G1 scale. Through experiments taken out under different conditions (flow rate, static liquid height and impeller fixed height), AE method based on multi-scale analysis was proved to show adequate sensibility and feasibility in the range of experimental conditions analyzed. By comparing experimental results from AE measurement with that from visual and power draw methods, we found that the average relative errors of AE method were no more than 2.62 % and 1.38%, respectively. It is concluded that multi-scale analysis of AE signals is a feasible means for determining the flooding/loading transition and have the merit of being sensitive, non-intrusive and accurate.
	TO cite this article:REN Congjing,ZHOU Yefeng,WANG Jingdai, et al. Determination of Flooding/Loading Transition Using Acoustic Emission Method[OL].[ 9 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4512864


	8. BaF2: NaxAlyFx+3y/TiO2 composite as a novel visible-light-driven photocatalyst based on upconversion emission
	LIU Enzhou,FAN Jun,HU Xiaoyun,HOU Wenqian,DAI Hongzhe
	Chemical Engineering 18 June 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A rare-earth free upconversion luminescence agent, BaF2: NaxAlyFx+3y (0.3＜x＜0.5, 0＜y＜0.1), was synthesized by a hydrothermal method. The fluorescence spectrum studies indicated that it could transform visible light (550-610 nm) into ultraviolet light (290-350 nm), and two emission peaks at 304 and 324 nm were observed under the excitation of 583 nm at the room temperature. Subsequently, BaF2: NaxAlyFx+3y/TiO2 composite photocatalyst was prepared and its catalytic activity was evaluated by the photocatalytic reduction of CO2 under visible light irradiation (λ＞515 nm). The results showed that BaF2: NaxAlyFx+3y/TiO2 was an effective photocatalyst for CO2 reduction than pure TiO2, the corresponding methanol yields were 179 and 0 μmol/g-cat under the same conditions. Additionally, the mechanism of photocatalytic reduction of CO2 on BaF2: NaxAlyFx+3y/TiO2 was proposed.
	TO cite this article:LIU Enzhou,FAN Jun,HU Xiaoyun, et al. BaF2: NaxAlyFx+3y/TiO2 composite as a novel visible-light-driven photocatalyst based on upconversion emission[OL].[18 June 2012] http://en.paper.edu.cn/en_releasepaper/content/4482567


	9. Fabrication of Alumina/Graphene Composite and its Catalytic Application property in the Selective Hydrodesulfurization of FCC Gasoline oil
	TIAN Jiwei,LIU Yunqi,TIAN Shuang,LIU Dandan,LIU Chenguang
	Chemical Engineering 27 February 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:A novel Al2O3/graphene oxide composite(Al2O3/GOs) was prepared by sol-gel technology. The as-synthesized materials were characterized by XRD, SEM／TEM, BET and FT-IR etc. The synthesis of graphite oxide (GO) was accomplished by the Hummers method. Before Sol-Gel process, exfoliated graphite oxide was dispersed into uniform suspension in water/alcohol solution. To investigate the modification effect from graphene in catalytic alumina materials, we investigated respectively the CoMoS catalysts supported in composite and γ-Al2O3 for selective HDS of FCC gasoline oil, the result showed the CoMoS catalyst loaded on Al2O3/graphene composite possess a higher selective hydrodesulfurization performance than γ-Al2O3.
	TO cite this article:TIAN Jiwei,LIU Yunqi,TIAN Shuang, et al. Fabrication of Alumina/Graphene Composite and its Catalytic Application property in the Selective Hydrodesulfurization of FCC Gasoline oil[OL].[27 February 2012] http://en.paper.edu.cn/en_releasepaper/content/4468840


	10. Biosynthesis of Metal Nanostructures and Their Potential Applications
	LU Fenfen,DU Mingming,HUANG Jiale,SUN Daohua,LI Qingbiao
	Chemical Engineering 27 October 2011
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Nanoscience and nanotechnology has attracted a great interest in resent years due to its growing impact on many areas such as materials structures, biotechnology, optoelectronics, data storage, microelectronics, micromechanics etc. A variety of chemical and physical procedures have been used to synthesize metal nanostructures. Although these methods could be used successfully to produce metal nanostructures, they involve expensive input, toxic solvents and hazardous chemicals. Therefore, there is increasing need to develop a reliable, nontoxic, cost-effective and eco-friendly approach. Biological approach is timely a promising approach to synthesize metal nanostructures. However, the research on biosynthesis of metal nanostructures still remains to simple conditional experiments and the characterization of the metal nanostructures hitherto, and the mechanism of reduction of metal nanoparticles is still not well understood. Therefore, this review provides an overview on the biosynthesis of metal nanostructures by plants, bacteria and fungi. The current application and prospects of biological synthesis of metal nanostructures are also presented.
	TO cite this article:LU Fenfen,DU Mingming,HUANG Jiale, et al. Biosynthesis of Metal Nanostructures and Their Potential Applications[OL].[27 October 2011] http://en.paper.edu.cn/en_releasepaper/content/4447574

	Check out RSS, or use RSS reader to subscribe this item