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Effects of the SAPO-11 synthetic process on dehydration of ethanol to ethylene

Lina WU, Xiaoxing SHI, Qun CUI, Haiyan WANG, He HUANG

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 60-66 doi: 10.1007/s11705-010-0540-7

Abstract: The effects of the synthetic condition of SAPO-11 molecular sieves on ethanol dehydration to ethyleneResults are as follows: the optimal synthetic conditions for SAPO-11 molecular sieves are adding pseudoboehmiteFrom the patterns of NH -TPD, the amount of acid synthesized by SAPO-11 molecular sieves is less thanthat by commercial SAPO-11 molecular sieves, and has a stronger weak acid.For two SAPO-11 molecular sieves, the by-products in the gas phase are mainly ethane, propane, propene

Keywords： SAPO-11 molecular sieves     synthesis     ethanol     ethylene     dehydration    

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Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

Shengping WANG, Changqing MA, Yun SHI, Xinbin MA

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 1,   Pages 95-103 doi: 10.1007/s11705-014-1405-2

Abstract: Titanium-containing mesoporous materials (Ti-MCM-41) were obtained by hydrothermal synthesis. Such materials are active catalysts for the transesterification of dimethyl oxalate and phenol to produce diphenyl oxalate. To understand the role of the Ti in the catalytic process, Ti-MCM-41 samples with different Si/Ti ratios (from 5 to 100) were prepared and the samples were analyzed by Fourier transform infrared spectroscopy, UV-visible spectroscopy, and ammonia temperature programmed desorption. It was concluded that the Ti is incorporated into the framework of the MCM-41 and formed weak Lewis acid sites. In addition, the number of Ti(IV) sites increased as the amount of titanium increased. X-ray powder diffraction, N adsorption-desorption and transmission electron microscopy results showed that the Ti-MCM-41 samples have a hexagonal arrangement of mono-dimensional pores. A large number of Ti(IV) sites coupled with the mesoporous structure and large pore diameters are favorable for the transesterification catalytic properties of Ti-MCM-41.

Keywords： Ti-MCM-41     mesoporous molecular sieve     acid sites     transesterification     hydrothermal synthesis    

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The synergic effects of highly selective bimetallic Pt-Pd/SAPO-41 catalysts for the

Guozhi Jia, Chunmu Guo, Wei Wang, Xuefeng Bai, Xiaomeng Wei, Xiaofang Su, Tong Li, Linfei Xiao, Wei Wu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1111-1124 doi: 10.1007/s11705-020-2031-9

Abstract: maximum -hexadecane yield over different catalysts increases as follows: Pt/silicoaluminophosphate SAPO-41SAPO-41SAPO-41 (prepared by sequential impregnation)SAPO-41 (prepared by co-impregnationOwing to the synergic effects between Pt and Pd, the Pt-Pd/SAPO-41 catalyst prepared by the co-impregnationAdditionally, the Pt-Pd/SAPO-41 catalyst also presents the highest catalytic activity and best stability

Keywords： SAPO-41 molecular sieve     Pt-Pd bimetallic site     bifunctional catalysts     n-hexadecane     hydroisomerization    

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Kinetic study of the methanol to olefin process on a SAPO-34 catalyst

Mehdi SEDIGHI,Kamyar KEYVANLOO

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 306-311 doi: 10.1007/s11705-014-1440-z

Abstract: In this paper, a new kinetic model for methanol to olefin process over SAPO-34 catalyst was developed

Keywords： methanol to olefin     SAPO-34     kinetic modeling     elementary step    

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Palmitoylation of GNAQ/11 is critical for tumor cell proliferation and survival in GNAQ/11-mutant uveal

Frontiers of Medicine 2022, Volume 16, Issue 5,   Pages 784-798 doi: 10.1007/s11684-021-0911-0

Abstract: More than 85% of patients with uveal melanoma (UM) carry a GNAQ or GNA11αq/11).GNAQ/11 relies on palmitoylation for membrane association and signal transduction.cells without GNAQ/11 mutations.therapeutic target for GNAQ/11-driven UM.

Keywords： uveal melanoma     mutant GNAQ/11     palmitoylation     BCL2     combination target therapy    

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Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 2,   Pages 226-238 doi: 10.1007/s11705-018-1709-8

Abstract: investigated in a bench-scale, fixed-bed reactor using an extruded catalyst composed of a commercial SAPOThe texture properties, acidity and crystal structure of the pure SAPO-34 and its extruded form (E-SAPOSubsequently, E-SAPO-34 was tested in a temperature range between 300 and 500 °C, using an aqueous methanol

Keywords： MTO     SAPO-34     temperature     extrusion     coke     light alkanes    

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Promotional effect of ion-exchanged K on the low-temperature hydrothermal stability of Cu/SAPO-34 and

Chen Wang, Jun Wang, Jianqiang Wang, Meiqing Shen

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1322-1

Abstract: Abstract • K+ hinder the structural degradation of Cu/SAPO-34 under humid condition<100°C. • K+ on Cu/SAPO-34 brings lower acidity and inferior SCR activity at high temperature. • Fe/Beta was used to compensatethe low activity of Cu/SAPO-34 at high temperature. • The hybrid catalysts with KCu/SAPO-34 and Fe/BetaK ions were introduced onto Cu/SAPO-34 catalysts via the ion-exchange process in order to improve theirFor the fresh Cu/SAPO-34 catalysts, K ions had little influence on the chabazite framework but effected

Keywords： Selective catalytic reduction     Cu/SAPO-34 catalyst     Ion-exchanged K     Low-temperature hydrothermal stability    

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Mechanistic insights into the selective photocatalytic degradation of dyes over TiO/ZSM-11

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1701-5

Abstract:

● TiO2/ZSM-11 was prepared by a facile solid state dispersion

Keywords： Selective dye degradation     Photocatalysis     TiO2     ZSM-11     Chemisorption    

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Organic Contaminants in Chinese Surface Water: Identification of Priority Pollutants” [Engineering 11 Corrigendum

Mengmeng Zhong, Tielong Wang, Wenxing Zhao, Jun Huang, Bin Wang, Lee Blaney, Qingwei Bu, Gang Yu

Engineering 2023, Volume 31, Issue 12,   Pages 139-140 doi: 10.1016/j.eng.2022.09.001

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High-precision diffusion measurement of ethane and propane over SAPO-34 zeolites for methanol-to-olefin

Dali Cai, Yu Cui, Zhao Jia, Yao Wang, Fei Wei

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 77-82 doi: 10.1007/s11705-017-1684-5

Abstract: However, a quantitative study of diffusion problems in SAPO-34 zeolites is lacking.diffusion behavior of ethane and propane, which represent ethylene and propylene respectively, over SAPOThe diffusions of ethane and propane over fresh and coked SAPO-34 zeolites with different crystal sizesEthane and propane show different diffusion behavior in SAPO-34.We believe that this work would be helpful for understanding the diffusion of different molecules in SAPO

Keywords： diffusion measurement     methanol-to-olefin process    

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Dynamic mechanism for the decline of China’s energy intensity during the 11th FYP (Five-Year Plan)

Minghui LI

Frontiers in Energy 2011, Volume 5, Issue 3,   Pages 237-249 doi: 10.1007/s11708-010-0130-x

Abstract: towards its goal of achieving approximately a 20% reduction in energy intensity during the period of the 11thproperties of the mechanism for the decrease in China’s energy intensity since the beginning of the 11thbefore 2000, technical energy savings have been the main driver of momentum since the beginning of the 11th

Keywords： energy intensity     structural energy savings     technical energy savings    

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Grouting construction technology of high pressure and rich water fault F11 in Qiyueshan Tunnel

Zhuo Yue,Sun Guoqing

Strategic Study of CAE 2009, Volume 11, Issue 12,   Pages 82-86

Abstract: Fractured fault F11, which has high water pressure, large volume of water gushing and complicated geologicalTaking the technologies of grouting, water control and rock collapse prevention adopted for fault F11examination method for water control and rock collapse prevention in high pressure and rich water fault F11

Keywords： Qiyueshan Tunnel     fractured fault     technical challenges     new construction scheme     new construction technology     effect examination method    

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The Security Analysis for Enhanced Data Encryption Schemes in IEEE802.11/11b WLAN

Song Yubo,Hu Aiqun,Cai Tianyou

Strategic Study of CAE 2004, Volume 6, Issue 10,   Pages 32-38

Abstract:

As an expansion of LAN, the WLAN reduce the cost of building a network infrastructure, to enjoy the mobile, high-quality, multimedia services. The 802.11 standard for wireless networks includes a Wired Equivalent Privacy (WEP) protocol, which is used to protect link-layer communications from eavesdropping and other attacks. Several serious security flaws in this protocol have been discovered and some solutions have been proposed to enhance WEP security. However, it is doubtful whether they can provide enough security as these solutions lack precisely security analysis. In this paper, concrete security analyses of various enhancing mechanisms are given. Results show that these mechanisms indeed increase security and bring significant, provable security gains in WLAN environment. The authors quantify the security as a function of the security of the primitives used, thereby enabling a user to decide how to construct an enhanced mechanism for desired demands.

Keywords： WLAN     encryption     WEP     rekey    

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Neutron Diffraction Investigation of the DyFe11Ti Magnetic Structure and Its Spin Reorientations Article

Olivier Isnard, Eder J. Kinast

Engineering 2020, Volume 6, Issue 2,   Pages 153-157 doi: 10.1016/j.eng.2019.11.009

Abstract:

In this article, we report on the magnetic structure of DyFe11Ti and its thermal evolution

Keywords： Neutron diffraction     Magnetic phase diagram     Crystal structure    

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Special issue on “Molecular Sensors and Molecular Logic Gates”

Luling Wu , Tony D. James

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 1-3 doi: 10.1007/s11705-021-2134-y

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Title Author Date Type Operation

Effects of the SAPO-11 synthetic process on dehydration of ethanol to ethylene

Lina WU, Xiaoxing SHI, Qun CUI, Haiyan WANG, He HUANG

Journal Article

Ti incorporation in MCM-41 mesoporous molecular sieves using hydrothermal synthesis

Shengping WANG, Changqing MA, Yun SHI, Xinbin MA

Journal Article

The synergic effects of highly selective bimetallic Pt-Pd/SAPO-41 catalysts for the

Guozhi Jia, Chunmu Guo, Wei Wang, Xuefeng Bai, Xiaomeng Wei, Xiaofang Su, Tong Li, Linfei Xiao, Wei Wu

Journal Article

Kinetic study of the methanol to olefin process on a SAPO-34 catalyst

Mehdi SEDIGHI,Kamyar KEYVANLOO

Journal Article

Palmitoylation of GNAQ/11 is critical for tumor cell proliferation and survival in GNAQ/11-mutant uveal

Journal Article

Effect of temperature in the conversion of methanol to olefins (MTO) using an extruded SAPO-34 catalyst

Ignacio Jorge Castellanos-Beltran, Gnouyaro Palla Assima, Jean-Michel Lavoie

Journal Article

Promotional effect of ion-exchanged K on the low-temperature hydrothermal stability of Cu/SAPO-34 and

Chen Wang, Jun Wang, Jianqiang Wang, Meiqing Shen

Journal Article

Mechanistic insights into the selective photocatalytic degradation of dyes over TiO/ZSM-11

Journal Article

Organic Contaminants in Chinese Surface Water: Identification of Priority Pollutants” [Engineering 11

Mengmeng Zhong, Tielong Wang, Wenxing Zhao, Jun Huang, Bin Wang, Lee Blaney, Qingwei Bu, Gang Yu

Journal Article

High-precision diffusion measurement of ethane and propane over SAPO-34 zeolites for methanol-to-olefin

Dali Cai, Yu Cui, Zhao Jia, Yao Wang, Fei Wei

Journal Article

Dynamic mechanism for the decline of China’s energy intensity during the 11th FYP (Five-Year Plan)

Minghui LI

Journal Article

Grouting construction technology of high pressure and rich water fault F11 in Qiyueshan Tunnel

Zhuo Yue,Sun Guoqing

Journal Article

The Security Analysis for Enhanced Data Encryption Schemes in IEEE802.11/11b WLAN

Song Yubo,Hu Aiqun,Cai Tianyou

Journal Article

Neutron Diffraction Investigation of the DyFe11Ti Magnetic Structure and Its Spin Reorientations

Olivier Isnard, Eder J. Kinast

Journal Article

Special issue on “Molecular Sensors and Molecular Logic Gates”

Luling Wu , Tony D. James

Journal Article