Synthesis of zeolites Na-A and Na-X from tablet compressed and calcinated coal fly ash.

ABSTRACT: Zeolites Na-A and Na-X are important synthetic zeolites widely used for separation and adsorption in industry. It is of great significance to develop energy-efficient routines that can synthesize zeolites Na-A and Na-X from low-cost raw materials. Coal fly ash (CFA) is the major residue from the combustion of coal and biomass containing more than 85% SiO₂ and Al₂O₃, which can readily replace the conventionally used sodium silicate and aluminate for zeolite synthesis. We used Na₂CO₃ to replace the expensive NaOH used for the calcination of CFA and showed that tablet compression can enhance the contact with Na₂CO₃ for the activation of CFA through calcination for the synthesis of zeolites Na-A and Na-X under mild co

SUBMITTER: Hu T 

PROVIDER: S-EPMC5666274 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature