%T In-situ hydrogenolysis of glycerol using hydrogen produced via aqueous phase reforming of glycerol over sonochemically synthesized nickel-based nano-catalyst
%A A. Syuhada
%A M. Ameen
%A M.T. Azizan
%A A. Aqsha
%A M.H.M. Yusoff
%A A. Ramli
%A M.S. Alnarabiji
%A F. Sher
%I Elsevier B.V.
%V 514
%X 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 �, and 450 rpm for 1 h. The synthesized catalysts were characterized using XRD, TEM, FESEM, BET, H2-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/CeO2Us 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 �) 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. © 2021 Elsevier B.V.
%K Ammonia; Batch reactors; Catalyst activity; Catalyst selectivity; Crystallite size; Hydrogen production; Hydrogenolysis; Hydrolysis; Impregnation; Nanocatalysts; Nickel, 1-3-propanediol; Aqueous-phase reforming; Higher yield; Ni/CeO2 catalyst; Renewable fuels; Sonochemical; Sonochemically synthesized catalyst; Synthesised; ]+ catalyst, Glycerol
%D 2021
%R 10.1016/j.mcat.2021.111860
%O cited By 27
%L scholars14511
%J Molecular Catalysis