Table 3 Summary of attempts by various authors to synthesize analcime from RH. MH: microwave; REF: refluxing; HYD: hydrothermal.
From: Rice husk as raw material in the synthesis of analcime
ref. | Starting materials | Calcination (°C) | Synthesis (°C) | Synthesis time (h) | Phases |
|---|---|---|---|---|---|
Present work | RHA + NaOH | 550 | 170 | 12 | Ana (97,53% by QPA) |
RH A + KOH | 600 | 180 | 2 MW + 16 HYD | Ana | |
RHA + NaOH + Al(OH)3+ silica gel | not indicated | not indicated | not indicated | Ana + NaX | |
Perlite and RHA | 700 | 140–170 | not indicated | Ana + NaP + Sod | |
RHA + fly ash | 700 | 100° refl + 130° HYD | 24–48 | P + Ana | |
RHA and Kaolin | 800 | 180 | 72 h aging + 24 h HYD | Ana | |
RHA and Kaolin | 700 | 120 | 12 | Ana + Linde B2 | |
RHA | 700 | 150 | 48–96 | Ana |
