Open AccessLow severity coal liquefaction promoted by cyclic olefins. Quarterly report, January--March 1996
Author(s) -
C.W. Curtis
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/634188
Subject(s) - tetralin , reactivity (psychology) , liquefaction , chemistry , coal liquefaction , naphthalene , infrared , coal , hydrogen , fourier transform infrared spectroscopy , organic chemistry , chemical engineering , medicine , physics , alternative medicine , pathology , optics , engineering
The goal of this research is to develop a methodology for analyzing the reactivity of cyclic olefins in situ in a high temperature and high pressure infrared cell. Cyclic olefins, such as 1,4,5,8-tetrahydronaphthalene (isotetralin) and 1,4,5,8,9, 10-hexahydroanthracene (HHA), are highly reactive donor compounds that readily donate their hydrogen to coal and model acceptors when heated to temperatures of 200 C and above. These donors are active donors in the low severity liquefaction of coal at 350 C as shown in the research performed in this project. The infrared studies are being performed in a high temperature infrared cell that was obtained from AABSPEC. Modifications to that cell have been made and have been reported in previous progress reports. Previous studies had shown that naphthalene was quite stable at temperatures up to 230 C, but a more definitive stability study was conducted to confirm this observation. Stability studies also confirmed the non-reactivity of decaline and tetralin at elevated temperatures up to 230 C. High temperature FTIR analysis of isotetralin showed that isotetralin reacted at temperatures of 100 C and higher to 230 C. This quarter, the reaction product spectrum was analyzed to determine the primary product