A laboratory stirred autoclave reactor has been developed to operate a
t temperatures up to 375 degrees C and pressures of at least 170 atma.
The performance of a commercial ''high pressure'' methanol synthesis
catalyst, the so-called ''zinc chromite'' catalyst, has been character
ized over a range of temperature from 300 to 375 degrees C, pressures
from 68 to 174 atma, H-2/CO ratios from 0.5 to 2.0 and space velocitie
s from 1500 to 10000 sL/kg(catalyst)-hr. Towards the lower end of the
temperature range, methanol was the only significant product. At the h
ighest temperatures, the methanol synthesis reaction was close to equi
librium. There were significant quantities of methane, dimethyl ether
and olefins in the product at these temperatures. Formation of higher
alcohols was insignificant, although small amounts of isobutanol were
formed at the highest temperatures and pressures, with 10 mole percent
CO2 in the feed gas.