Guidelines for Ethylene Quench Towers Karl Kolmetz GTC Technology LP Houston kkolmetz@yahoo.com Timothy M. Zygula omg21@cox.net Chee Mun Tham GTC Process Technology Pte Ltd Singapore Dr. Wai Kiong Ng 1 Jun H Chan GTC Process Technology Pte Ltd Singapore Jeff N Gray KLM Technology Group Australia jeffngray@hotmail.com Prepared for 2007 AIChE Spring Meeting Houston TX USA 1 Presently at Institute of Chemical and Engineering Sciences (ICES), Singapore, ng_wai_kiong@ices.a-star.edu.sg