Methods for preparing silicon carbide membrane supports using activated coke fly ash

A method for preparing silicon carbide membrane supports using activated coke fly ash, comprising:

• S1, mixing silicon carbide aggregate, the activated coke fly ash, and sintering aids according to a predetermined ratio to obtain a homogeneous mixed powder a, wherein the activated coke fly ash is a porous material that absorbs sulfur dioxide (SO2) and ammonia (NH3), the activated coke fly ash contains metal catalysts and the activated coke fly ash has an elemental composition of carbon (C), nitrogen (N), oxygen (O), sulfur(S), copper (Cu), and zirconium (Zr);
• S2, adding a polyvinyl alcohol aqueous solution to the mixed powder a to obtain a mixture, and homogenizing the mixture to form a premixed material b;
• S3, forming a silicon carbide support green body from the premixed material b by mechanical extrusion, followed by isothermal drying to obtain a dried support green body c;
• and
• S4, sintering the dried support green body c in a muffle furnace under a programmed temperature profile to obtain a silicon carbide membrane support d.