STUDY ON A NEW METHOD AND MECHANISM OF THE LOW-TEMPERATURE METHANOL SYNTHESIS FROM CO/CO2/H2
IntroductionMethanol is widely used as a feedstock for the chemical industries and at the same time as an alternative fuel which is cleaner and more efficient in fule cells 1. Commercially, methanol is produced from synthesis gas under high temperature and high pressure, using mainly Cu-Zn based oxide catalysts 2,3. However, the efficiency of methanol synthesis is severely limited by thermodynamics. For example, at 573 K. And 5.0 Mpa, the theoretical maximum of one-pass CO conversion is around 20 % 3. Therefore, developing a low-temperature process for methanol synthesis will greatly reduce the production cost and high CO conversion becomes available at low temperature.Low-temperature methanol synthesis in a liquid medium is one of the solutions to this 4,5. Wender et al realized this synthesis in liquid phase using a mixed catalyst comprised of alkali alkoxides and copper based oxide catalysts under the mild conditions of 373-453 K and 5.0-6.5 Mpa, and gave high methanol synthesis rates and high one-pass CO conversions 5. However, a remarkable drawback of this process is that trace amount of carbon dioxide and water in the feed gas (CO/H2) or reaction system will deactivate the strongly basic catalyst soon 4, which implies high cost coming from the complete purification of the syngas from the methane reformer or the gasification plant, as well as the re-activation process of the deactivated catalyst.
Wenze Li Linjiu Xiao Baoyan Zhang Ruiqin Yang
School of Science, Northeastern University Shenyang, 110004, China School of Applied Chemistry Sheny School of Applied Chemistry Shenyang Institute of Chemical Technology Shenyang 110142, China School of Science, Northeastern University Shenyang, 110004, China
国际会议
The 7th China-Korea Workshop on Clean Energy Technology(第七届中韩清洁能源技术研讨会)
太原
英文
257-258
2008-06-25（万方平台首次上网日期，不代表论文的发表时间）