eprintid: 13406 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/01/34/06 datestamp: 2023-11-10 03:27:58 lastmod: 2023-11-10 03:27:58 status_changed: 2023-11-10 01:51:05 type: article metadata_visibility: show creators_name: Shafiq, U. creators_name: Shariff, A.M. creators_name: Babar, M. creators_name: Azeem, B. creators_name: Ali, A. creators_name: Bustam, A. title: Study of dry ice formation during blowdown of CO�-CH� from cryogenic distillation column ispublished: pub keywords: Air purification; Binary mixtures; Carbon dioxide; Cryogenics; Hazards; Ice; Orifices; Refrigerants; Thermoelectricity, Blow down; Computational investigation; Cryogenic distillation columns; Dry ice; Empirical correlations; Experimental validations; High pressure; High-pressure condition, Distillation columns note: cited By 7 abstract: Cryogenic distillation columns are generally subjected to high-pressure loadings during the natural gas purification process. The high-pressure conditions inside the column cause safety risk e.g. rupture. When an emergency arises, blowdown is a typical way of minimizing the failure hazard. However, blowdown at the cryogenic conditions involves dry ice formation due to the rapid decrease in temperature driven by the Joule-Thomson effect. The dry ice formation intensifies the failure hazard due to the orifice blockage. Therefore, optimization of blowdown parameters is necessary to avoid the dry ice formation. So far, very limited studies are available in the literature for the blowdown of CO�-CH� mixture, especially at the cryogenic conditions. In this study, a computational investigation followed by the experimental validation is accomplished to analyze the dry ice formation during blowdown of CO�-CH� binary mixture from the cryogenic distillation column. The composition of mixture, orifice size, and initial conditions inside vessel have a high impact on blowdown path. A 3.00 mm orifice is the most suitable size for the blowdown at cryogenic conditions as it doesn't promote solidification and discharges the inventory quickly. Based on the experimental observation, an empirical correlation is also developed to instantly find out the optimum blowdown parameters. © 2020 Elsevier Ltd date: 2020 publisher: Elsevier Ltd official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85080061588&doi=10.1016%2fj.jlp.2020.104073&partnerID=40&md5=acc8ebc2411d9e997af31951e591099d id_number: 10.1016/j.jlp.2020.104073 full_text_status: none publication: Journal of Loss Prevention in the Process Industries volume: 64 refereed: TRUE issn: 09504230 citation: Shafiq, U. and Shariff, A.M. and Babar, M. and Azeem, B. and Ali, A. and Bustam, A. (2020) Study of dry ice formation during blowdown of CO�-CH� from cryogenic distillation column. Journal of Loss Prevention in the Process Industries, 64. ISSN 09504230