Annealing and TMOS coating on PSF/ZTC mixed matrix membrane for enhanced CO2/ CH4 and H2/CH4 separation

Nurul Widiastuti, Irmariza Shafitri Caralin, Alvin Rahmad Widyanto, Rika Wijiyanti, Triyanda Gunawan, Zulhairun Abdul Karim, Mikihiro Nomura, Yuki Yoshida

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Recently, natural gas (mostly methane) is frequently used as fuel, while hydrogen is a promising renewable energy source. However, each gas produced contains impurity gases. As a result, membrane separation is required. The mixed matrix membrane (MMM) is a promising membrane. The huge surface area and well-defined pore structure of zeolite templated carbon (ZTC)-based MMM allow for effective separation. However, the interfacial vacuum in MMM is difficult to avoid, contributing to poor separation performance. This research tries to improve separation performance by altering membrane surfaces. MMM PSF/ZTC was modified by annealing at 120, 150, and 190°C; coating using 0.01, 0.03, and 0.05 mol tetramethyl orthosilicate (TMOS); and a combination of both, i.e. annealing at 190°C and coating using 0.03 mol TMOS. MMM PSF/ZTC successfully significantly improved CO2/CH4 selectivity by a combination of annealing at 190°C and coating 0.03 mol TMOS from 1.37 to 5.90 (331%), and H2/CH4 selectivity by coating with 0.03 mol TMOS from 4.58 to 65.76 (1378%). The enhancement of selectivity was due to structural changes to the membrane that became denser and smoother, which SEM and AFM observed. In this study, annealing and coating treatments are the methods investigated for improving the polymer matrix and filler particle adhesion.

Original languageEnglish
Article number211371
JournalRoyal Society Open Science
Volume9
Issue number6
DOIs
Publication statusPublished - 2022 Jun 22

Keywords

  • annealing
  • coating
  • gas separation
  • mixed matrix membrane
  • polysulfone-zeolite templated carbon

ASJC Scopus subject areas

  • General

Fingerprint

Dive into the research topics of 'Annealing and TMOS coating on PSF/ZTC mixed matrix membrane for enhanced CO2/ CH4 and H2/CH4 separation'. Together they form a unique fingerprint.

Cite this