Hydrogen Production by Low-temperature Steam Reforming of Bio-oil over Ni/HZSM-5 Catalyst

Abstract

We investigated high catalytic activity of Ni/HZSM-5 catalysts synthesized by the impregnation method, which was successfully applied for low-temperature steam reforming of bio-oil. The influences of the catalyst composition, reforming temperature and the molar ratio of steam to carbon fed on the stream reforming process of bio-oil over the Ni/HZSM-5 catalysts were investigated in the reforming reactor. The promoting effects of current passing through the catalyst on the bio-oil reforming were also studied using the electrochemical catalytic reforming approach. By comparing Ni/HZSM-5 with commonly used Ni/Al2O3 catalysts, the Ni20/ZSM catalyst with Ni-loading content of about 20% on the HZSM-5 support showed the highest catalytic activity. Even at 450 °C, the hydrogen yield of about 90% with a near complete conversion of bio-oil was obtained using the Ni20/ZSM catalyst. It was found that the performance of the bio-oil reforming was remarkably enhanced by the HZSM-5 supporter and the current through the catalyst. The features of the Ni/HZSM-5 catalysts were also investigated via X-ray diffraction, inductively coupled plasma and atomic emission spectroscopy, hydrogen temperature-programmed reduction, and Brunauer-Emmett-Teller methods.

Catalysts for Steam Reforming of Bio-oil: A Review

“…It is generally accepted that the HZSM-5 zeolite is very active for deoxygenation and C−C cracking. Using 20 wt % Ni/ HZSM-5, Qiu et al 44 achieved a H 2 yield of ∼90% with nearly complete conversion of crude bio-oil (CH 2.03 O 0.67 •0.89H 2 O) at 450 °C and a S/C ratio of 17, which was much higher than that of the Ni/Al 2 O 3 catalyst at ∼60% conversion. The H 2 yield for the catalyst, however, reached a value of ∼99.8% at 600 °C.…”

Modified nickel-based catalysts for improved steam reforming of biomass tar: A critical review

“…For biomass gasification, nickel supported on Al2O3 catalysts have been reported to have higher activity compared with nickel supported on MgO, TiO2, CeO2 and ZrO2 [33], ZrO2, MgO, TiO2, SiO2 [54]. In addition, nickel has also been supported on other materials, for example, dolomite [55,56], char [37,57,58], olivine [59], ceramic foam [60], mayenite [61], HZSM-5 [62] and MCM-41 [63].…”

A Model for Carbon Deposition During Hydrogen Production by the Steam Reforming of Bio-oil

“…Therefore, hydrogen production using bio-oil is more economically feasible. So far, much research into the steam reforming of bio-oil for producing hydrogen has been reported (Aktas et al, 2010;Qiu et al, 2011;Rioche et al, 2005;Takanabe et al, 2004;Wang et al, 1997;Wu and Liu, 2011).…”