公开(公告)号：US11278846B2

公开(公告)日：2022-03-22

申请号：US16470230

申请日：2017-06-09

Applicant: Nanjing University of Technology

Inventor： Xuehong Gu ,  Lin Wang ,  Chun Zhang

IPC: B01D67/00 ,  B01D53/22 ,  B01D71/02 ,  B01D69/10

Abstract: Provided is a method for preparing a defect-free DDR molecular sieve membrane. Sigma-1 molecular sieve is used as an inducing seed crystal to prepare and obtain a continuous and compact DDR molecular sieve membrane on the surface of a porous ceramic support. An ozone atmosphere or an external field assisted technology is used to remove a template in the pores of the molecular sieve membrane at a low temperature. The invention avoids the formation of intercrystal defects and cracks, an activated DDR molecular sieve membrane has a good selectivity for separating CO2, and the membrane preparation time is significantly reduced.