A New Way to Increase Catalyst Activity

Abstract

ABSTRACT:A new method for conducting a heterogeneous catalytic reaction in the gaseous phase is discussed. It eliminates the use of carriers and allows catalysis to be conducted via an aerosol of finely milled active catalytic materials. Problems associated with the strength and thermal stability of catalysts are thereby avoided. A high and constant catalytic activity is ensured for the aerosol catalyst by integrating the chemical reaction zone and the mechanical treatment zone. Thus, solid particles that move with the reactant flow or special devices that allow mechanical treatment of the catalyst particles may be located in the reactor. Such aerosol catalysis has been tested in processes involving partial and complete oxidation, recovery, vinylation, chlorination and dechlorination. Relative to traditional systems, i.e. placement of the active catalytic active material on the carrier, the reaction rate was increased by 4-5 orders of magnitude. The production of catalysts and the implementation of chemical reactions are thereby both simplified simultaneously.

An alternative technology for catalytical processes. the aerosol nanocatalysis

“…Это сразу позволило получить обнадеживающие результаты, так как обеспечивался прямой контакт реагентов непосредственно с поверхностью каталитически активных частиц [2,3]. Новое решение обеспечивает оптимальные условия для осуществления любых химических реакций в кинетической области со скоростями, превышающими в 10 4 -10 6 раз значения, достигнутые при катализе на носителях [4,5].…”

“…Это известно с 1988 г. [5]. В начале ХХI в. резко увеличивается количество публикаций в области механохимии, в которых как бы впервые сообщаются об изменении каталитических свойств активной поверхности материалов вследствие механической обработки.…”

“…-любой каталитически активный материал при применении механохимактивации в технологии AnC повышает и сохраняет активность неограниченное время [3,[5][6][7][8][9][10].…”

Investigations and Applications of Aerosol Nano-Catalysis in a Vibrofluidized (Vibrating) Bed

“…There is also an increased tendency towards catalyst poisoning as well as a higher cost for catalyst production. These problems have been studied in detail by Glikin et al (2000).…”

Specific control parameters in the technology of aerosol nanocatalysis

“…After our publications [3,4] authors [5] studied the changes in activity of one nanoparticle of Ni in quartz. They studied using the example of the reaction methanation where nanoparticle of Ni remained in the reactor volume.…”