Summary of synthesis of mordenite zeolite.

S. no.	Title	Source for silica and alumina	Template	Reaction conditions	Reference
1	Rice husk ash	Rice husk ash (RHA) and metakaolin	Absence	Room temperature for sol–gel process; calcinated at 550 °C for 6 h	25
2	Waste coal fly ash	Waste coal fly ash for both	No information	Crystallization at 150 to 170 °C	27
3	Silica gel/low-cost mixed organic templates	Silica gel and aluminum nitrate	Low-cost mixed organic templates (glycerol (GL), ethylene glycol (EG), polyethylene glycol 200 (PEG))	Crystallization at 180 °C for 2 days; calcinated at 550 °C for 2 h	30
4	Silica fume (microsilica)	Silica fume and metakaolin	Absence	Heated for 24 h at 180 °C in a Teflon reactor; no calcination	31
5	Faujasite/N-cetyl-N-methylpyrrolidinium (C16NMP)	Sodium silicate and faujasite zeolite	Pyrrolidine-based mesoporogen	Crystallization at 140 °C for 6 days with stirring (50 RPM); calcined at 550 °C for 10 h	32
6	Ball milling, solvent-free synthesis	Sodium silicate, SiO2, Al2(SO4)3·18H2O	Absence	In an oven for 24, 48, or 72 h at 180 °C	33
7	Ultrafast, organic structure-directing agent-free synthesis	40 wt% LUDOX HS-40 (colloidal silica) and NaAlO2	Absence	Heated at 210 °C in an oil bath	38
8	Piperazine as OSDA	Ludox AS-40 and NaAlO2	Piperazine	Hydrothermally treated at 150 °C for 72 h to 192 h	43