公开(公告)号：US20250121357A1

公开(公告)日：2025-04-17

申请号：US18915696

申请日：2024-10-15

Applicant: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY

Inventor： David C. CALABRO ,  Shabab A. ABEDI ,  Hilda B. VROMAN ,  Peter I. RAVIKOVITCH ,  Giovanni M. MURARO ,  Scott J. WEIGEL

IPC: B01J20/32 ,  B01D53/02 ,  B01J20/26 ,  B01J20/28

Abstract: Methods are provided for making amine-functionalized organosilica materials that include additional amine functionalities that are grafted to the composition after the initial synthesis. Methods of using such materials are also provided. It has been discovered that additional aminosilyl groups can be grafted onto amine-functionalized organosilica materials under conditions that substantially preserve the original CO2 sorption capacity of the underlying organosilica material prior to grafting. This allows the additional amines in the grafted aminosilyl groups to increase the net capacity of the grafted material, as opposed to primarily replacing the original CO2 sorption capacity with the sorption capacity of the grafted amine functionalities.