Direct synthesis of high-silica nano ZSM-5 aggregates with controllable mesoporosity and enhanced catalytic properties

RSC Advances ◽  
2016 ◽  
Vol 6 (101) ◽  
pp. 99129-99138 ◽  
Author(s):  
Hongyao Li ◽  
Yaquan Wang ◽  
Fanjun Meng ◽  
Hengbao Chen ◽  
Chao Sun ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Direct Synthesis ◽  
High Silica

In the absence of additional mesoporous template, high-silica nano-sized ZSM-5 aggregates have been rapidly synthesized by solid-like state conversion.

Catalytic properties of high-silica zeolites in hydrotreatment of coal liquefaction products

Fuel ◽  
1997 ◽  
Vol 76 (7) ◽  
pp. 683-685 ◽  
Author(s):  
Andrey A. Krichko ◽  
Anatoly S. Maloletnev ◽  
Olga A. Mazneva ◽  
Sergey G. Gagarin
Keyword(s):  
Catalytic Properties ◽  
Coal Liquefaction ◽  
High Silica ◽  
High Silica Zeolites ◽  
Coal Liquefaction Products

Influence of thermal and hydrothermal activation on the adsorptive, acidic and catalytic properties of high-silica zeolites

1984 ◽  
Vol 24 (3-4) ◽  
pp. 277-280 ◽  
Author(s):  
Yu. V. Shumovskii ◽  
S. N. Khadzhiev ◽  
M. I. Levinbuk ◽  
T. V. Limova
Keyword(s):  
Catalytic Properties ◽  
High Silica ◽  
High Silica Zeolites

Direct Synthesis of 2,5-Diformylfuran from Carbohydrates Using High-Silica MOR Zeolite-Supported Isolated Vanadium Species

2017 ◽  
Vol 5 (11) ◽  
pp. 10029-10037 ◽  
Author(s):  
Wei Zhang ◽  
Tongsuo Meng ◽  
Junjie Tang ◽  
Wenxia Zhuang ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
High Silica ◽  
Vanadium Species

Understanding the impact of one-dimensional pore containing 10MR and 12MR and aluminium content on MTH reaction pathways: direct synthesis of heteroatom containing UZM-55

2020 ◽  
Vol 10 (3) ◽  
pp. 726-735
Author(s):  
Melissa M. Galey ◽  
Mark A. Miller ◽  
Mary Lanuza ◽  
Sesh Prabhakar ◽  
Christopher P. Nicholas
Keyword(s):  
Pore Structure ◽  
Catalytic Properties ◽  
Direct Synthesis ◽  
Reaction Pathways ◽  
Aluminium Content ◽  
One Dimensional ◽  
The Impact

We directly synthesized one-dimensional zeolite UZM-55 as an aluminosilicate and catalyzed MTH to understand pore structure influence on catalytic properties.

scholarly journals Enhanced Direct Dimethyl Ether Synthesis from CO2-Rich Syngas with Cu/ZnO/ZrO2 Catalysts Prepared by Continuous Co-Precipitation

Catalysts ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 816
Author(s):  
Sabrina Polierer ◽  
David Guse ◽  
Stefan Wild ◽  
Karla Herrera Delgado ◽  
Thomas N. Otto ◽  
...  
Keyword(s):  
Dimethyl Ether ◽  
Catalytic Properties ◽  
Direct Synthesis ◽  
Copper Surface ◽  
Precipitation Method ◽  
Dme Synthesis ◽  
Surface Areas ◽  
Dimethyl Ether Synthesis ◽  
Material Homogeneity ◽  
Co Precipitation

The manufacturing of technical catalysts generally involves a sequence of different process steps, of which co-precipitation is one of the most important. In this study, we investigate how continuous co-precipitation influences the properties of Cu/ZnO/ZrO2 (CZZ) catalysts and their application in the direct synthesis of dimethyl ether (DME) from CO2/CO/H2 feeds. We compare material characteristics investigated by means of XRF, XRD, N2 physisorption, H2-TPR, N2O-RFC, TEM and EDXS as well as the catalytic properties to those of CZZ catalysts prepared by a semi-batch co-precipitation method. Ultra-fast mixing in continuous co-precipitation results in high BET and copper surface areas as well as in improved metal dispersion. DME synthesis performed in combination with a ferrierite-type co-catalyst shows correspondingly improved productivity for CZZ catalysts prepared by the continuous co-precipitation method, using CO2-rich as well as CO-rich syngas feeds. Our continuous co-precipitation approach allows for improved material homogeneity due to faster and more homogeneous solid formation. The so-called “chemical memory” stamped during initial co-precipitation is kept through all process steps and is reflected in the final catalytic properties. Furthermore, our continuous co-precipitation approach may be easily scaled-up to industrial production rates by numbering-up. Hence, we believe that our approach represents a promising contribution to improve catalysts for direct DME synthesis.

The Influence of the Dealumination of the High Silica Zeolite ZVM on the Character of OH groups and the Catalytic Properties

1989 ◽  
Vol 270 (1) ◽  
pp. 1-4 ◽  
Author(s):  
K.-H. Schnabel ◽  
U. Lohse ◽  
Ch. Peuker ◽  
D. Freude ◽  
O. V. Bragin ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Oh Groups ◽  
High Silica

2H → 1T Phase Change in Direct Synthesis of WS2 Nanosheets via Solution-Based Electrochemical Exfoliation and Their Catalytic Properties

2017 ◽  
Vol 9 (31) ◽  
pp. 26350-26356 ◽  
Author(s):  
Shi Xuan Leong ◽  
Carmen C. Mayorga-Martinez ◽  
Xinyi Chia ◽  
Jan Luxa ◽  
Zdeněk Sofer ◽  
...  
Keyword(s):  
Phase Change ◽  
Catalytic Properties ◽  
Direct Synthesis ◽  
Electrochemical Exfoliation ◽  
Ws2 Nanosheets

Catalytic properties of high-silica zeolites synthesized in mixtures of water and organic solvent

1992 ◽  
Vol 87 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Michio Sugimoto ◽  
Kozo Takatsu ◽  
Nobuyuki Morimoto ◽  
Noboru Kawata
Keyword(s):  
Organic Solvent ◽  
Catalytic Properties ◽  
High Silica ◽  
High Silica Zeolites

Synthesis, Structure Solution, Characterization, and Catalytic Properties of TNU-10:  A High-Silica Zeolite with the STI Topology

2004 ◽  
Vol 126 (18) ◽  
pp. 5817-5826 ◽  
Author(s):  
Suk Bong Hong ◽  
Emily G. Lear ◽  
Paul A. Wright ◽  
Wuzong Zhou ◽  
Paul A. Cox ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Structure Solution ◽  
High Silica
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