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Asep Nugraha, Asep
STIKes Bakti Tunas Husada
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Physics Public Health Social Sciences Other

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Adsorption Performance of Regenerated Molecular Sieves for Moisture Removal in Compressed Oxygen Gas M. Baqir; Maulana, Fahrul; Nugraha, Asep; Hidayat, Rachmat; F, Zaeturohmah; Jakariya
Scientific Contributions Oil and Gas Vol 49 No 1 (2026)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v49i1.1952

Abstract

This study focuses on evaluating the adsorption performance of regenerated molecular sieves repurposed as moisture adsorbents for compressed oxygen gas. The spent adsorbents are collected from a Phase Technology Freezing Point analyzer after saturation is achieved through repeated operational cycles. Two thermal regeneration methods are  investigated, namely (1) staged heating in a furnace at 350 °C for 2 hours followed by a 30-minute vacuum treatment, and (2) staged heating in a gas chromatography (GC) oven at 350 °C with a dry-nitrogen purge for an hour, followed by another 1 hour without purging and a 30-minute vacuum duration. Furthermore, the physical characteristics after regeneration are assessed using the UOP Method 422 for particle size distribution (PSD) through micromesh sieving. Moisture adsorption performance is evaluated according to ASTM D1142 using a dew-point measurement with compressed oxygen at operating pressures and flow rates of 30–50 psi and 0.5–1.0 L/min, respectively. The results indicate that regenerated molecular sieves retain approximately 80–90% of the adsorption capacity of new material, which demonstrates that the GC-oven regeneration method exhibits slightly superior performance compared to furnace regeneration. These finding prove that appropriate thermal regeneration enables effective reuse of spent molecular sieves, providing a technically viable and economically favorable strategy for moisture removal in oxygen-drying applications while reducing laboratory waste.
Co-Authors Abdus Salam, Abdus Ahmad Hikami, Haikal Ardiwinata Ardiwinata, Ardiwinata Arif Fauzan, Arif Asep Wahyudin F, Zaeturohmah Fauzi Firdaus, Dicky Hanif Shobaruddin Heru Kurniawan Iman Imanudin Jakariya Komala, Icuh M. Baqir Maulana, Fahrul Mochamad Zakky Mubarok Neneng Wahyuni Nuryatimah, Yayat Oktaviani, Mega RACHMAT HIDAYAT Ramadhan, Riki ROHANI CINTA BADIA GINTING Ropi’ah, Eva Siti Sanria, Virgiawan Saputro, Bintang Ilhan Harjo Setiawan, Riezky Fauji Sujata, Tatang Sumardiyanto, , Tiwit Widowati, Tiwit UTUT WIDYASTUTI