Hydrochar supported bimetallic Ni–Fe nanocatalysts with tailored composition, size and shape for improved biomass steam reforming performance
| Autor: | Yu Xia, Zhengang Liu, Nana Peng, Fang Zhang, Chao Gai, Tingting Liu, Qianqian Lang, Wentao Jiao, Tianxue Yang |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Pollution Nanomaterial-based catalyst 0104 chemical sciences Catalysis law.invention Steam reforming Nickel Chemical engineering chemistry law Environmental Chemistry Calcination 0210 nano-technology Bimetallic strip Sludge Hydrogen production |
| Zdroj: | Green Chemistry. 20:2788-2800 |
| ISSN: | 1463-9270 1463-9262 |
| Popis: | Multicomponent nickel–iron alloy nanoparticles supported on hydrochar were synthesized by a facile one-step hydrothermal strategy. Spinel nickel ferrite (NiFe2O4) with a small crystalline size around 10 nm was uniformly dispersed on a bimetallic catalyst. The roles of the Ni/Fe doping concentration and calcination temperature in tailoring the phase, morphology and size of the Ni–Fe alloy nanoparticles were investigated. To probe the catalytic abilities of the prepared bimetallic catalysts, a two-stage reaction system was applied for steam gasification of sewage sludge. Compared to monometallic nickel nanoparticles, the synthesized bimetallic catalyst, especially Ni0.25Fe0.25/HC calcined at 700 °C, showed excellent dispersibility of the Ni–Fe alloy NPs and exhibited a strong metal–support interaction, which allowed for better suppression of carbon deposition and nanoparticle agglomeration in the reforming process. The best catalytic performance resulted in a promoted hydrogen selectivity of 113.7 g H2 per kg sludge with a low tar yield of 2.3 mg g−1 under mild gasification conditions. These shape- and size-modulated nanocatalysts harbor promising potential for their application as a highly efficient catalyst for hydrogen production via steam gasification of sewage sludge. |
| Databáze: | OpenAIRE |
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