Manufacturing of Industrial Zeolite Molecular Sieves

Abstract

Manufacturing of Industrial Zeolite Molecular SievesSince more than 60 years zeolite molecular sieves are mainly used in industrial processes as high efficient adsorbents in purification or separation processes in gas or liquid phase. As response to the different requirements in the final application different manufacturing processes were developed. In this review the impact of synthesis and/or shaping processes onto the properties of hydrophilic, zeolite molecular sieves with regard to their industrial use are demonstrated and explained on special examples. Thereby zeolite powder, as well as shaped binder-containing and binderless material is considered.

Temperature Swing Adsorption in Natural Gas Processing: A Concise Overview

“…This zeolite is frequently used in the natural gas industry for the separation of heavy mercaptans and heavy hydrocarbons , . The crystalline zeolite particles are often embedded in macroporous binder material to obtain spherical or cylindrical pellets with different particle diameters , . In general, zeolites have a narrow, clearly defined pore structure in the microporous area (see Tab.…”

“…Physical adsorption processes like TSA can be used in the natural gas treatment process chain to remove acidic components such as CO 2 and H 2 S. However, as adsorption is only technically and economically feasible in the range of low concentrations of CO 2 and H 2 S in the feed gas, it is usually used as a fine purification step in coupling with a gas scrubber (e.g., alkanolamine scrubber) , . For the physical adsorption of CO 2 and H 2 S mainly zeolitic adsorbents of type 4A, 5A and 13X can be used , . CO 2 is removed in common dehydration units using a 4A zeolite without heavy hydrocarbon separation.…”

Developing and Stabilizing Salt-Hydrate Composites as Thermal Storage Materials

“…The calcination parameters highly influence the thermal and mechanical stability of the samples. Outgassing (or activation: water of crystallization < 1 wt.%) as NaX-granules, are achieved at 350-400°C, whereas the attapulgite binder in NaX requires higher calcination temperatures about 500°C for guaranteed mechanical stability of the granules [29]. To ensure the hydrothermal stability of zeolite structures, gentle thermal treatment is facilitated by low heating rates and constant removal of the water vapor by flushing gas.…”

Investigation of the Adsorption of Hydrogen Sulfide on Faujasite Zeolites Focusing on the Influence of Cations

“…In natural gas cleaning, cyclic-temperature swing adsorption (TSA) processes are used with polar adsorbents such as zeolites, silica gels, or silica alumina gels. , Separation of sulfur components in particular is preferably carried out with zeolites with a faujasite (FAU) or a Linde type A (LTA) structure . As zeolites are aluminosilicates and consist of an anionic framework with exchangeable cations, the type and number of cations strongly influence adsorption properties. − LTA zeolites are primarily used to dry the natural gas, but they also come into contact with H 2 S molecules and can separate them from the gas. ,, We have already investigated the adsorption properties of LTA zeolites in the adsorption of H 2 S depending on the Na + and Ca 2+ cations they contain in a previous study . The present work deals with the adsorption properties of FAU zeolites and can be considered as a continuation of the first study.…”