Why are carbon molecular sieves interesting?

Abstract

Este trabalho descreve os métodos de produção e os usos potenciais das peneiras moleculares de carbono. A principal rota sintética para estes materiais é a replicação, onde uma peneira molecular de sílica ou aluminossilicato é usada como gabarito (template) para o crescimento de uma fase carbonácea nos seus canais e cavidades. Estes materiais podem ter aplicações tão variadas como separação, adsorção e armazenamento de gases, como eletrodos em baterias e como suportes de catalisadores, todas elas extremamente dependentes da porosidade da peneira molecular de carbono. This paper describes the production methods and the prospective uses of carbon molecular sieves. The main route to these materials is replication synthesis, where a silica or aluminosilicate molecular sieve is used as template to grow the carbonaceous phase in the voids. These materials may have applications as varied as in separation, adsorption and storage of gases, as electrodes in batteries, and as catalyst supports, all of them highly dependent on the molecular sieve porosity.

KFeSbTe3: a quaternary chalcogenide aerogel for preferential adsorption of polarizable hydrocarbons and gases

“…5 The characteristics of the adsorbent determine the separation efficiency. Porous materials such as zeolites, silica gel and activated carbon, 6 molecular sieves, 7 polymeric resins, 8 composite materials, 9 and metal-organic frameworks 3,10 have already been investigated for adsorptive separations.…”

Synthesis, Characterization, and Hydrodesulfurization Activity of New Mesoporous Carbon Supported Transition Metal Sulfide Catalysts

“…Carbon has many positive attributes linked with it such as a high SA, availability of a large variety of PSDs, variable surface functional groups, and reduced coking propensity. , Carbon offers tremendous promise as a catalytic support material . In recent years, carbon has received much attention as a support for HDS catalysts since high HDS activities have been reported which may originate from more favorable support/catalytic species interaction .…”

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

“…Carbon-based materials have been used in several catalytic applications as supports, owing to their display of favorable support-metal interaction when necessary. [79,80] Activated carbon (AC) and different carbon nanostructures (CNSs) have been reported as a HDS support and exhibited excellent catalytic activities. [37,[81][82][83] However, their characteristics microporous disordered pore structure and low specific pore volume have hindered their applicability for heavier organosulfur molecules that required large pores for diffusion of reactants and products during the reaction.…”

“…Carbon‐based materials have been used in several catalytic applications as supports, owing to their display of favorable support‐metal interaction when necessary [79,80] . Activated carbon (AC) and different carbon nanostructures (CNSs) have been reported as a HDS support and exhibited excellent catalytic activities [37,81–83] .…”