Method for production of ddr type zeolite membrane
AssigneeNGK Insulators, Ltd.
InventorsTetsuya Uchikawa, Kenji Yajima, Hisayoshi Nonaka, Toshihiro Tomita
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Abstract
A method for producing a DDR type zeolite membrane, which method comprises a membrane formation step of immersing a porous substrate having a DDR type zeolite seed crystal adhered thereon, in a raw material solution containing 1-adamantaneamine, silica (SiO2) and water, and conducting a hydrothermal synthesis of DDR type zeolite to form a 1-adamantaneamine-containing DDR type zeolite membrane on the porous substrate to produce a precursor of DDR type zeolite membrane-containing body, and a burning step of heating the precursor at 400° C. or above and at 550° C. or below to burn and remove the 1-adamantaneamine contained in the DDR type zeolite membrane.
Claims3
A method for producing a DDR type zeolite membrane having a separation ability of 10 or higher separation coefficient to a mixed gas of carbon dioxide (CO2) and methane (CH4), which method comprises
- a membrane formation step of immersing a porous substrate having a DDR type zeolite seed crystal adhered thereon, in a raw material solution containing 1-adamantaneamine, silica (SiO2) and water, and conducting a hydrothermal synthesis of DDR type zeolite to form a 1-adamantaneamine-containing DDR type zeolite membrane on the porous substrate to produce a precursor of DDR type zeolite membrane, and
- a burning step of heating the precursor at 400° C. or above and at 550° C. or below to burn and remove the 1-adamantaneamine contained in the DDR type zeolite membrane.
Dependencies are inferred from the claim text.