Authors: Anthony Basuni Hamzah; Raden Cik Awang; Sri Haryati; Muhammad Djoni Bustan
Addresses: Department of Chemical Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan ' Sekolah Tinggi Ilmu Maritim Mutiara Jaya, Jl. Raya Natar, Merak Batin, Natar 35362, Indonesia ' Chemical Engineering Graduate Program, Sriwijaya University, Jalan Padang Selasa, 542 Bukit Besar, Palembang 30139, Indonesia ' Chemical Engineering Graduate Program, Sriwijaya University, Jalan Padang Selasa, 542 Bukit Besar, Palembang 30139, Indonesia
Abstract: It is widely accepted that exergy diagnosis on reactor often overlooks the intrinsic reaction and physico-chemical factors in the reactor itself. In this work, these factors are included to analyse their influence on the exergetic performances of the primary steam reformer (PMSR). Thermal and steam to carbon (S/C) ratio sensitivity assessment was performed to obtain the optimal operating conditions of the reactor. Aside of the conventional exergetic analysis, physical-chemical exergy destruction ratio was also introduced to determine the most dominant irreversibility in the system. Results of numerical simulation showed that higher temperature increases hydrogen production and at the same S/C ratio, decreases chemically-driven exergy destruction. The exception applied on very low S/C (around 2) and very high temperature (880°C-900°C), where significant physico-thermally-driven exergy destruction was observed. On the other hand, excessive steam leads to more exergy losses, while the exergy destruction was kept at minimal and more chemically-driven.
Keywords: exergy analysis; hydrogen production; primary steam reformer; physical-chemical exergy; destruction ratio.
International Journal of Exergy, 2021 Vol.35 No.4, pp.484 - 502
Received: 23 Nov 2020
Accepted: 18 Jan 2021
Published online: 05 Aug 2021 *