Application of Porous Mo-Based Catalyst for Wet Restructuring Reaction of Syngas
Date Issued
2012
Date
2012
Author(s)
Weng, Mu-Chieh
Abstract
In order to reduce the stress of energy demand in Taiwan, utilizing the refuse resulted from biomass to produce bio-energy has been considered as one of the good alternatives available. It can be firstly gasified to generate synthesis gas, and then converted to liquid fuel by the technology called syngas restructuring reaction. Besides above advantage for energy application, using waste as the feedstock also offers a solution for reducing the environmental burden in dealing with garbage.
In this study, the experiments of wet syngas restructuring reaction (WSR) were operated at high temperature (T) and pressure (P) in a slurry reactor. For enhancing the reaction, micron catalysts named ZSM5-PW (with no Mo), 1MoS2/ZSM5-PW (with 5.2 wt.% Mo) and 4MoS2/ZSM5-PW (with 16.0 wt.% Mo) were used to proceed the wet catalytic syngas restructuring reaction (WCSR). The sole WSR without catalyst, already exhibits higher selectivities (S) for high-carbon-containing alcohols (or higher alcohols) than for low-carbon-containing alcohols (or lower alcohols). The effect of Mo content of catalyst (MMo) on the CO conversion (XCO) via WCSR is significantly positive. Furthermore, the influences of other key parameters such as the reaction temperature, reaction time (t), and H2/CO mole ratio (MH/C) and initial total pressure (PC/H,0) of the feed of synthesis gas were also examined. The results show that the selectivities of higher alcohols decrease if T is too high. The specific production rates (SPRs) of organic compounds decrease with the increase of t. At a proper low MH/C of 0.6, the selectivities of higher alcohols are elevated, favoring the production of higher alcohols. A higher PC/H,0 of H2 and CO can raise up the SPRs of non-CO2 carbon-containing compounds, and increase the selectivities of higher alcohols avoiding the decomposition of higher alcohols at higher T.
Subjects
syngas
molybdenum disulfide
slurry reactor
wet air
Type
thesis
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