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- W2387818777 abstract "The polyethylene glycol (PEG) solution was examined in the presence of zirconium oxide supported nickel catalysts (Ni/ZrO2) in sub- and supercritical water (350—430℃ and 24 MPa) in a continuous reactor with the residence time of 60—300 s.As a result, the main gaseous products were hydrogen, carbon monoxide, methane and carbon dioxide.When PEG was gasified with 90 g 15% Ni/ZrO2 at 430℃, 24 MPa, residence time 300 s, 70.14 mol H2 was produced by gasifying 1 kg PEG, which was 5.1 times of the hydrogen yield produced without catalyst, 2.6 times of the hydrogen yield produced catalyzed with 90 g ZrO2, the RTOC(TOC removal efficiency),RCG(carbon gasification ratio) and RHG(hydrogen gasification ratio) were 88.84%, 88.50% and 169.40% respectively.The amount of gases increased with an increase in nickel loading on zirconium oxide.When the mass fraction of Ni rose to 15% from 5%,the RTOC,RCG and RHG rose to 58.66%,58.16% and 112.49% from 45.31%,44.55% and 78.25% respectively at 410℃,24 MPa, residence time 180 s.Higher temperature and longer residence time had positive effect on gasification and increase hydrogen yield.The gasification efficiency and H2 yield decreased with the increase of PEG concentration, but CO2 yield increased initially and then decreased and CH4 yield increased because the water-gas shift reaction was restrained and the methanation reaction was accelerated with the increase of PEG concentration.The experiment proved that Ni/ZrO2 showed good catalytic activity, especially in hydrogen production.For the same reaction efficiency, reaction temperature can be lowered by about 80℃." @default.
- W2387818777 created "2016-06-24" @default.
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- W2387818777 date "2008-01-01" @default.
- W2387818777 modified "2023-09-25" @default.
- W2387818777 title "Characteristics of hydrogen production from polyethylene glycol wastewater by sub-supercritical water gasification with Ni/ZrO_2 catalysts" @default.
- W2387818777 hasPublicationYear "2008" @default.
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