期刊
CHEMICAL ENGINEERING JOURNAL
卷 293, 期 -, 页码 129-138出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.02.093
关键词
Methanol carbonylation; Deactivation; Activated carbon support; Oxygen-containing groups; Micro-fluidized bed; On-line sampling
资金
- National Key Scientific Instruments and Equipment Development of China [2011YQ120039]
The activated carbon was pretreated by different concentrations of HNO3 solution to prepare Ni/AC catalysts with different oxygen contents. The change of the oxygen-containing groups during the carbonylation was traced using an instrument named Micro-Fluidized Bed Reactor Analyst-Particle (MFBRA-P), which can sample out catalyst particles on-line at specific time interval during the reaction. The online sampled catalysts were characterized by N-2-sorption, inductively coupled plasma-atomic emission spectroscopy (ICP-AES), transmission electron microscope (TEM), temperature programmed desorption (TPD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). It was found that catalysts with smaller amount of oxygen-containing groups had higher initial activity and higher deactivation rate, which was consistent with the accumulation rate of oxygen-containing groups. High content of oxygen suppressed the accumulation of oxygen-containing carbonaceous deposits, resulting in better catalytic stability for carbonylation. (C) 2016 Elsevier B.V. All rights reserved.
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