SYNOPSIS

Sub-Critical water is high temperature and high pressure water but lower than those of critical points (647 K, 22.1 MPa). It shows three typical characteristics. Firstly, sub-critical water (sub-CW) has a great hydrolysis power at around 520 K and organic solids quickly decompose into low-molecular-weight valuable materials. Secondly, sub-CW works as a strong solvent and can extract oil almost perfectly at once. Thirdly, when the temperature is higher than about 600 K, hydrolysis power becomes small and pyrolysis power becomes great. The pyrolysis reaction can convert organics to liquid oil (alternative heavy crude oil) and/or solid char.


BIODATA OF SPEAKERS

Dr. Hiroyuki Yoshida obtained B. Eng. Degree in 1969 and Dr. Eng. in 1977 in Chemical Engineering from Osaka Prefecture University, Japan. He worked for this University from 1974 to 2013. He became a professor in 1995. From 2013, he has been working for Department of Chemical and Environmental Engineering, Faculty of Engineering, UPM as a contract professor. His specialties are ion exchange and adsorption, zero-emission process, sub-critical water technology, and super-heated water vapor carbonization. He was a Leader of “Zero Emission by Forming Networks among Various Production Processes in Different Types of Industry” in a national project (US$0.79 million, 1997-2000). He was Executive Leader of “Science and Engineering for Water-Assisted Evolution of Valuable Resources and Energy from Organic Wastes”, 21st Center of Excellence Program of Ministry of education, Japan (US$6 million, 2002-2007). He has about 140 papers of top journals and 60 patents on sub-critical water and adsorption. He was a president of Japan Society of Adsorption (2001-2003) and a vice president of The Society of Chemical Engineers, Japan (2009-2010).