Promoting effect of Al2O3/ZnO-based nanofluids stabilized by SDS surfactant on CH4+C2H6+C3H8 hydrate formation

Kakati, Himangshu; Mandal, Ajay; Laik, Sukumar

doi:10.1016/j.jiec.2016.01.014

Cited by 85 publications

(30 citation statements)

References 29 publications

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“…Researchers used various methods for achieving stability of nanofluids such as, ultrasonication method [30,37], surfactant addition [3,38,39], pH modification [40,41], surface modification technique [42,43] etc. For instance, Elias, Mahbubul [37] found stability up to three days while preparing Al2O3 nanofluid using the two-step method.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Urmi¹,

Rahman²,

Azmi³

et al. 2020

ARFMTS

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This paper is presented to investigate experimentally on the stability of 40% ethylene glycol-based TiO2-Al2O3 hybrid nanofluids. Recently, the research is more highlighted on the thermophysical-properties of nanofluids. Hence, the stability of the hybrid nanofluids thoroughly assessed in this research work. The study uses the two-step method for preparing 40% ethylene glycol-based TiO2-Al2O3 hybrid nanofluids. The experiment is carried out for the various combination of mixture ratios including 20:80, 40:60, 50:50, 60:40 and 80:20 of TiO2-Al2O3 nanoparticles with a volume concentration of 0.1%. The stability assessment of hybrid nanofluids is accomplished through visualisation effect, transmission electronic microscopic observation, UV-Vis spectrophotometry and zeta potential value from particle size analyser. The findings show the optimum mixing ratios of TiO2-Al2O3 nanoparticles in terms of stability which is further confirmed by Zeta potential and absorbency from UV-Vis spectrophotometry. The results from the study reveal that 80:20 ratio of TiO2-Al2O3 nanoparticles possesses the best uniformity for over 21 days without any noticeable settlement of particles in the colloidal suspension. Moreover, 50:50 and 60:40 ratios show modest stability for almost two weeks while 20:80 and 40:60 ratios of TiO2-Al2O3 nanoparticles show minimum stability along with rapid sedimentation in the dispersion. However, it is also evident that the optimum mixing ratio of TiO2-Al2O3 hybrid nanofluids has excellent stability which will lead to further study on the thermal properties of nanofluids and finally motivate engineers to the real-life application of nanofluids.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Urmi¹,

Rahman²,

Azmi³

et al. 2020

ARFMTS

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“…However, the carbon content in ethane is more than that of methane. Therefore, improving the conversion of ethane and reducing the carbon formation are widely studied in DRE . Normally, Ni‐based material is widely used as a catalyst to increase the syngas yield or conversion of reactant gas ,,.…”

Section: Introductionmentioning

confidence: 99%

Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al₂O₃ Catalyst: Syngas Production Enhanced over Ni‐CeO_x Formation

Liu

Akhtamberdinova

et al. 2018

ChemCatChem

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The dry reforming of shale gas (methane and ethane with an average ratio of 4 : 1) with carbon dioxide (DRS) is considered to be a promising way to produce syngas, which widens the utilization of shale gas and mitigates carbon dioxide emission. In this paper, Ce modified Ni‐based catalysts were developed and the corresponding catalytic performances for DRS were investigated with a fixed bed reactor. Results showed that the catalyst containing 5 wt% of Ni and 5 wt% of Ce performed a best catalytic effect, including the selectivity of syngas and the carbon resistance performance, which is due to the good metal dispersion, strong interaction between Ni and Ce, and the formation of Ni‐CeOx solid solution. The electron transfer between Ni and Ce, substitution of Ni for Ce, and the sequential oxygen vacancies or defects, play significant roles in activating CH4, C2H6 and CO2. The conversion of reactant gas increased with temperature, while the selectivity of syngas is little affected with temperature. In addition, the desired catalyst containing 5 wt% of Ni and 5 wt% of Ce showed good stability in the long‐time operation, which indicates that the Ce modified Ni‐based catalyst is a promising one for the dry reforming of shale gas.

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“…At the same time, these additives do not have a noticeable effect on the degree of water transformation into hydrate achieved during the process. The addition of SDS together with ZnO and Al 2 O 3 nanoparticles not only causes a decrease of the induction period but also increases the rate of hydrate formation [45] . The authors of Ref.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, the works cited above are focused either on the effect of solid particles (metals, metal oxides etc., [34][35][36][37][38][39][40]42] ) on hydrate formation or on the effect of surfactants [38][39][40]43] . In some works, experimental data on the induction period of hydrate formation for pure water, for a solution of surfactant and for the combinations of surfactants with solid particles are presented [44][45][46] , but the information on the effect of solid particles on the nucleation is absent from these works. So, an essential factor which is perfectly necessary for the correct interpretation of the results obtained was omitted.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of combination of surfactant and oxide powder on enhancement of gas hydrates nucleation

Nesterov

Reshetnikov

Manakov

et al. 2017

Journal of Energy Chemistry

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Promoting effect of Al2O3/ZnO-based nanofluids stabilized by SDS surfactant on CH4+C2H6+C3H8 hydrate formation

Cited by 85 publications

References 29 publications

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al₂O₃ Catalyst: Syngas Production Enhanced over Ni‐CeO_x Formation

Synergistic effect of combination of surfactant and oxide powder on enhancement of gas hydrates nucleation

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Promoting effect of Al2O3/ZnO-based nanofluids stabilized by SDS surfactant on CH4+C2H6+C3H8 hydrate formation

Cited by 85 publications

References 29 publications

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Experimental Investigation on the Stability of 40% Ethylene Glycol Based TiO2-Al2O3 Hybrid Nanofluids

Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al2O3 Catalyst: Syngas Production Enhanced over Ni‐CeOx Formation

Synergistic effect of combination of surfactant and oxide powder on enhancement of gas hydrates nucleation

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Dry Reforming of Shale Gas and Carbon Dioxide with Ni‐Ce‐Al₂O₃ Catalyst: Syngas Production Enhanced over Ni‐CeO_x Formation