Facile fabrication of Ni-based KIT-6 for adsorptive desulfurization

TY - JOUR

T1 - Facile fabrication of Ni-based KIT-6 for adsorptive desulfurization

AU - Aslam, Sobia

AU - Subhan, Fazle

AU - Yan, Zifeng

AU - Peng, Peng

AU - Qiao, Ke

AU - Xing, Wei

AU - Bai, Peng

AU - Ullah, Rooh

AU - Etim, U. J.

AU - Zeng, Jingbin

AU - Ikram, Muhammad

N1 - Publisher Copyright: © 2016 Elsevier B.V.

PY - 2016/10/15

Y1 - 2016/10/15

N2 - In the present contribution, a single step H2-reduction strategy was developed for the first time to fabricate nickel-based KIT-6 (Ni-KIT-6) for adsorptive desulfurization of fuels. As-synthesized KIT-6 was used as a support and nickel nitrate, nickel chloride and nickel acetate as a nickel precursor was directly introduced into as-synthesized KIT-6. Ni0-based KIT-6 was obtained by single-step H2-reduction strategy which not only remove template and decompose nickel precursors to NiO but also reduce NiO to Ni0. This strategy is much more convenient and facile than reported strategies for Ni-based mesoporous silica KIT-6. Characterization results show that Ni-KIT-6 with nickel content up to 30 wt.% was highly dispersed due to silanols and confined space in as-synthesized KIT-6. The percentage content (54%) of Ni0 in the as-synthesized KIT-6 is higher than Ni-based calcined KIT-6 (38%). Interestingly, Ni-based as-synthesized KIT-6 prepared using nickel nitrate as a precursor exhibited stronger nickel-KIT-6 interaction, higher Ni0 content and dispersion than those prepared with nickel chloride and nickel acetate precursors. We also demonstrate here that the shielding effect of capping anions and hydration degree of different nickel precursors significantly affect the dispersion of nickel species even using as-prepared KIT-6 as a support. As a result, Ni-KIT-6(NO3-) captured 0.195 and 0.12 mmol g-1 of sulfur from model fuel and FCC gasoline, respectively. Thus, single step H2-reduction strategy may have potential applications to be applied for fabrication of other nickel based mesoporous silicas for adsorptive desulfurization technology.

AB - In the present contribution, a single step H2-reduction strategy was developed for the first time to fabricate nickel-based KIT-6 (Ni-KIT-6) for adsorptive desulfurization of fuels. As-synthesized KIT-6 was used as a support and nickel nitrate, nickel chloride and nickel acetate as a nickel precursor was directly introduced into as-synthesized KIT-6. Ni0-based KIT-6 was obtained by single-step H2-reduction strategy which not only remove template and decompose nickel precursors to NiO but also reduce NiO to Ni0. This strategy is much more convenient and facile than reported strategies for Ni-based mesoporous silica KIT-6. Characterization results show that Ni-KIT-6 with nickel content up to 30 wt.% was highly dispersed due to silanols and confined space in as-synthesized KIT-6. The percentage content (54%) of Ni0 in the as-synthesized KIT-6 is higher than Ni-based calcined KIT-6 (38%). Interestingly, Ni-based as-synthesized KIT-6 prepared using nickel nitrate as a precursor exhibited stronger nickel-KIT-6 interaction, higher Ni0 content and dispersion than those prepared with nickel chloride and nickel acetate precursors. We also demonstrate here that the shielding effect of capping anions and hydration degree of different nickel precursors significantly affect the dispersion of nickel species even using as-prepared KIT-6 as a support. As a result, Ni-KIT-6(NO3-) captured 0.195 and 0.12 mmol g-1 of sulfur from model fuel and FCC gasoline, respectively. Thus, single step H2-reduction strategy may have potential applications to be applied for fabrication of other nickel based mesoporous silicas for adsorptive desulfurization technology.

KW - Adsorption

KW - Fuels

KW - KIT-6

KW - Nickel precursors

KW - One-step H-reduction strategy

UR - http://www.scopus.com/inward/record.url?scp=84969900537&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2016.05.041

DO - 10.1016/j.cej.2016.05.041

M3 - 文章

AN - SCOPUS:84969900537

SN - 1385-8947

VL - 302

SP - 239

EP - 248

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -