Premium
Product Loss Minimization of an Integrated Cryogenic Separation System
Author(s) -
Yang X.,
Xu Q.
Publication year - 2012
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201100337
Subject(s) - process engineering , refrigeration , air separation , methane , liquefied natural gas , hydrogen , minification , environmental science , ethylene , natural gas , waste management , engineering , computer science , chemistry , mechanical engineering , catalysis , biochemistry , organic chemistry , oxygen , programming language
The integrated cold box and demethanizer system as one of the most critical production sections in an ethylene plant couples multistage refrigeration and cryogenic separation to extract hydrogen and methane from the cracked gas feed. Ethylene and the heavier components are liquefied for recovery in the downstream process. During separation, ethylene contained in the methane and hydrogen streams is accounted as the product loss which in reality is significant. To reduce the ethylene loss with energy consumption consideration, a systematic methodology has been developed to optimize the process operation of the integrated cold box and demethanizer system. It covers rigorous simulation model development and validation, sensitivity analysis, operational optimization, and result analysis. The optimization results demonstrate the significant economic benefits of the proposed methodology.