Ethane aromatization and evolution of carbon deposits over nanosized and microsized Zn/ZSM-5 catalysts

2020 ◽  
Vol 10 (3) ◽  
pp. 835-843 ◽  
Author(s):  
Yan Zhang ◽  
Shide Wu ◽  
Xia Xu ◽  
Heqing Jiang
Keyword(s):  
Product Yield ◽  
Carbon Deposits ◽  
Ethane Aromatization ◽  
Improved Stability

Nanosized Zn/HZSM-5 facilitated the faster escape of light aromatics from zeolite channels and exhibited higher product yield and improved stability.

Re/HZSM-5: a new catalyst for ethane aromatization with improved stability

2003 ◽  
Vol 4 (12) ◽  
pp. 627-630 ◽  
Author(s):  
Anne Krogh ◽  
Anke Hagen ◽  
Thomas W Hansen ◽  
Claus Hviid Christensen ◽  
Iver Schmidt
Keyword(s):  
Ethane Aromatization ◽  
Improved Stability

Improved Stability of a Thin-Film Multijunction Thermal Converter

2012 ◽  
Vol 132 (11) ◽  
pp. 1011-1017 ◽  
Author(s):  
Yasutaka Amagai ◽  
Hiroyuki Fujiki ◽  
Koji Shimizume ◽  
Shigeru Hidaka
Keyword(s):  
Thin Film ◽  
Thermal Converter ◽  
Improved Stability

Improved Stability of a Protein Vaccine Through Elimination of a Partially Unfolded State

2004 ◽  
Author(s):  
Colleen A. McHugh ◽  
Ralph F. Tammariello ◽  
Charles B. Millard ◽  
John H. Carra
Keyword(s):  
Protein Vaccine ◽  
Unfolded State ◽  
Improved Stability ◽  
Partially Unfolded

Zinc Sulfamate Catalyzed Efficient Selective Synthesis of Benzimidazole Derivatives under Ambient Conditions

2019 ◽  
Vol 16 (9) ◽  
pp. 740-749
Author(s):  
Sushil R. Mathapati ◽  
Arvind H. Jadhav ◽  
Mantosh B. Swami ◽  
Jairaj K. Dawle
Keyword(s):  
Benzimidazole Derivative ◽  
Sulfamic Acid ◽  
Aromatic Aldehydes ◽  
Catalytic Amount ◽  
Product Yield ◽  
Lewis Acidity ◽  
Benzimidazole Derivatives ◽  
Ambient Conditions ◽  
Reaction Condition ◽  
Green Approach

Zinc sulfamate (Zn(NH2SO3)2 is a derivative of sulfamic acid (H3NSO3) which possesses “Lewis acidity” and finds well suited in a number of catalytic applications. The present paper describes an efficient, eco-friendly, and clean synthesis of 2-substituted benzimidazole derivatives by reacting diverse o-phenylenediamine with various substituted aromatic aldehydes using a catalytic amount of zinc sulfamate in ethanol at ambient temperature. As a result, 10 mol.% of Zinc sulfamate catalyst showed 92% of respective product yield with 100% conversion using short reaction period in ethanol. Meanwhile, effect of reaction parameters, such as amount of catalyst, different solvents, and reaction temperature on reaction product, was also studied. In addition, in the optimized reaction condition various substituted biological important benzimidazoles derivatives were prepared by using optimized reaction condition in good to efficient yield. In addition, possible reaction mechanism in the presence of zinc sulfamate for the preparation of benzimidazole derivative was sketched and discussed. The present green approach showed significances with faster reaction rate with inexpensive catalyst, which showed excellent and clean yield of benzimidazole in mild reaction condition with easy work-up procedure.

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