Synthesis of zeolite with a gmelinite structure in the dolomite-halloysite-obsidian system

Determining the Role of Water Molecules in Sodalite Formation Using the Vapor Phase Crystallization Method

“…The use of obsidian is driven by the easy availability of amorphous silica in a natural, widespread, and economical source. Literature data have documented its combination with other phases to form a new raw material available for the synthesis of zeolites [55,56].…”

Zeolites synthesis from phyllosilicates and their performance for CO2 adsorption

“…Considering that CO 2 capture is the most expensive step in the CCS process, the use of low-cost silicon and aluminum sources is necessary to obtain inexpensive zeolites with high CO 2 -adsorption capacity (Khaleque et al 2020). In this sense, several raw materials have been proposed such as blast furnace slag (Sugano et al 2005), rice husk ash (Mohamed et al 2015;Saceda et al 2011), paper sludge ash (Mun and Ahn 2001), coal fly ash (Amoni et al 2019), waste of iron mine tailings (Zhang and Li 2018), waste glass materials (Tsujiguchi et al 2014) or minerals and rocks such as obsidian (Belviso 2016;Mamedova 2016), perlite (Filho et al 2018;Wajima and Onishi 2019) or clay minerals (Abdullahi et al 2017;Belviso et al 2017;Johnson and Arshad 2014;Mackinnon et al 2010;Youssef et al 2008). In the present research, several phyllosilicates (kaolinite, montmorillonite, saponite, sepiolite and palygorskite) have been used as starting materials for the synthesis of zeolites through the alkaline fusion method (Belviso et al 2017;Chen et al 2014;Khalifa et al 2000).…”