4.5 Article

In-situ hydrogenolysis of glycerol using hydrogen produced via aqueous phase reforming of glycerol over sonochemically synthesized nickel-based nano-catalyst

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MOLECULAR CATALYSIS
卷 514, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.mcat.2021.111860

关键词

Renewable fuels; Aqueous phase reforming; Hydrogenolysis; Glycerol; 1,3-Propanediol; Sonochemically synthesized catalyst; Ni/CeO2 catalyst

资金

  1. Yayasan Universiti Teknologi PETRONAS [YUTP-015LC0-091]
  2. Ministry of Higher Education Malaysia (MoHE) for Higher Institution Centre of Excellence (HICoE) [015MA0-052]

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This study investigated the production of 1,3-Propanediol using Ni-Ca/CeO2 catalysts synthesized by sonochemical and wet impregnation methods. Sonochemically prepared catalysts showed better surface characteristics. The Ni/CeO2 catalyst demonstrated the highest activity and selectivity for 1,3-Propanediol production.
1,3-Propanediol (1,3-PDO) is a commercially valuable chemical for the production of polytrimethylene terephthalate polymers and polyurethane. In this study, the production of 1,3-PDO was investigated via aqueous phase reforming (APR) and selective hydrogenolysis of glycerol over Ni-Ca/CeO2 catalysts synthesized by sonochemical (Us) and wet impregnation (WI) methods. The experiments were performed in a batch reactor at 20 bar, 230 degrees C, and 450 rpm for 1 h. The synthesized catalysts were characterized using XRD, TEM, FESEM, BET, H-2-TPR, XPS, CO-chemisorption, and NH3-TPD to better understand the physio-chemical and surface characteristics. The results revealed that sonochemical catalysts showed a larger surface area, smaller crystallite size, low reduction temperature and more homogenous particle distribution than wet impregnation catalysts. For both preparation methods, monometallic Ni/CeO2 catalysts showed the highest activity, whereas Ca modification of Ni/CeO2 catalysts significantly decreased the activity of the catalysts. The highest yield and selectivity of 1,3-PDO were 19.54% and 52.73%, respectively, using Ni/CeO2_Us catalyst. The best catalyst was further utilized for parameters optimization study to observe the effect of varying glycerol concentration (10 to 25 vol.%), temperature (210 to 250 degrees C) and pressure (10 to 30 bar) on the yield and selectivity of 1,3-PDO and glycerol conversion. The results demonstrated that the highest yield (19.54%) and selectivity (52.73%) of 1,3-PDO were obtained over 10 vol.%, 230. and 20 bar with glycerol conversion of 54.26%. This present study provides a promising and economical process of converting glycerol to 1,3-PDO, which has wide applications in the industry.

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