Unusual nickel dispersion in confined spaces of mesoporous silica by one-pot strategy for deep desulfurization of sulfur compounds and FCC gasoline

TY - JOUR

T1 - Unusual nickel dispersion in confined spaces of mesoporous silica by one-pot strategy for deep desulfurization of sulfur compounds and FCC gasoline

AU - Aslam, Sobia

AU - Subhan, Fazle

AU - Yan, Zifeng

AU - Liu, Zhen

AU - Ullah, Rooh

AU - Etim, U. J.

AU - Xing, Wei

N1 - Publisher Copyright: © 2017 Elsevier B.V.

PY - 2017

Y1 - 2017

N2 - Unusual nickel dispersion in the micro-environment of as-synthesized SBA-15 was achieved for the first time by one-pot reduction strategy. Template occluded SBA-15 was used as a host and Ni(NO3)2·6H2O salt precursor was directly introduced into the micro-environment between the aggregates of template and silica walls. The subsequent one-pot reduction strategy plays three functions in one by decomposing Ni(NO3)2 to NiO, template P123 removal, and reduction of NiO to Ni0. This solvent-free technique is not only time and energy efficient but also well-disperse large amount, 30 wt%, of Ni0 species in mesoporous channels as verified by various characterization techniques. In comparison with traditional strategies, our method is much convenient for N0-based adsorbents, and the yield of N0 is 75% in the case of NiAS-30 derived from as-prepared SBA-15, which is apparently higher than 65% of NiCS-30 counterpart obtained from calcined SBA-15. The synthesized materials are highly active in adsorptive desulfurization of thiophene due to strong acidity and the adsorbed amount over NiAS-30 reach 0.22 mmol/g much better than NiCS-30 (0.12 mmol/g). More importantly, the thiophene capture abilities were recovered without any loss. Convenient synthesis, high activity, good stability and reusability made the present materials highly promising in adsorptive desulfurization technologies.

AB - Unusual nickel dispersion in the micro-environment of as-synthesized SBA-15 was achieved for the first time by one-pot reduction strategy. Template occluded SBA-15 was used as a host and Ni(NO3)2·6H2O salt precursor was directly introduced into the micro-environment between the aggregates of template and silica walls. The subsequent one-pot reduction strategy plays three functions in one by decomposing Ni(NO3)2 to NiO, template P123 removal, and reduction of NiO to Ni0. This solvent-free technique is not only time and energy efficient but also well-disperse large amount, 30 wt%, of Ni0 species in mesoporous channels as verified by various characterization techniques. In comparison with traditional strategies, our method is much convenient for N0-based adsorbents, and the yield of N0 is 75% in the case of NiAS-30 derived from as-prepared SBA-15, which is apparently higher than 65% of NiCS-30 counterpart obtained from calcined SBA-15. The synthesized materials are highly active in adsorptive desulfurization of thiophene due to strong acidity and the adsorbed amount over NiAS-30 reach 0.22 mmol/g much better than NiCS-30 (0.12 mmol/g). More importantly, the thiophene capture abilities were recovered without any loss. Convenient synthesis, high activity, good stability and reusability made the present materials highly promising in adsorptive desulfurization technologies.

KW - Acid sites

KW - Desulfurization

KW - Nickel oxide

KW - Template-occluded mesoporous silica

KW - Thiophene

UR - http://www.scopus.com/inward/record.url?scp=85016256134&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2017.03.079

DO - 10.1016/j.cej.2017.03.079

M3 - 文章

AN - SCOPUS:85016256134

SN - 1385-8947

VL - 321

SP - 48

EP - 57

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

ER -