Method for manufacturing a structure provided with DDR zeolite membrane

A method for manufacturing a DDR zeolite membrane element, the method comprising the steps of:

• immersing a porous substrate in a raw material solution containing 1-adamanthanamine, silica, and water,
• forming a DDR zeolite membrane containing 1-adamanthanamine on a surface of the porous substrate by subjecting a DDR zeolite to hydrothermal synthesis in the presence of DDR zeolite seed crystals,
• applying a glass paste onto the surface of the porous substrate so as to contact the DDR zeolite membrane containing 1-adamanthanamine,
• and heating the DDR zeolite membrane at 500 to 800° C., thereby burning away the 1-adamanthanamine contained in the DDR zeolite membrane and melting the glass paste to form a membrane-like glass seal contacting the DDR zeolite membrane on the surface of the porous substrate to obtain a DDR zeolite membrane element comprising the porous substrate, the DDR zeolite membrane disposed on the surface of the porous substrate, and the glass seal disposed on the surface of the porous substrate so as to contact the DDR zeolite membrane.