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Nickel supported on low-rank coal for steam reforming of ethyl acetate
Ruhswurmova, Nikola,Kim, Soohyun,Yoo, Jiho,Chun, Donghyuk,Rhim, Youngjoon,Lim, Jeonghwan,Kim, Sangdo,Choi, Hokyung,Lee, Sihyun Elsevier 2018 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Vol.43 No.33
<P><B>Abstract</B></P> <P>Ethyl acetate is a volatile organic compound (VOC) that has emerged as a major environmental pollutant and also one of representative components of bio-oil. In this study, mostly metallic Ni particles (size: <10 nm) were finely dispersed on low-rank coal (LRC) by the ion-exchange process. Catalytic steam reforming of ethyl acetate (EA) was performed over Ni supported on Eco LRC (Ni/Eco) to reduce EA emissions and simultaneously produce H<SUB>2</SUB>. EA reforming over 17.7 wt% Ni/Eco at 400 °C results in H<SUB>2</SUB> yield of 70%–80%; this is comparable to that achieved with reforming over commercial Ni/Al<SUB>2</SUB>O<SUB>3</SUB>. Advantageously, metallic Ni particles are dominant over Ni oxides on LRC, and therefore, the pre-reduction step routinely required for an alumina-supported catalyst can be skipped. Furthermore, deactivation by coking is slower with Ni/Eco than with Ni/Al<SUB>2</SUB>O<SUB>3</SUB> during long-term operation, probably because of the smaller particle size and preferential adsorption on the coal support.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Nano-dispersion of Ni on low rank coal (LRC) is achieved. </LI> <LI> LRC-supported Ni catalyses the steam reforming of ethyl acetate. </LI> <LI> Ni particles on LRC are mostly in active metallic form. </LI> <LI> Ni on LRC is less susceptible to coking-related deactivation. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>