Study of sulfur-resistant Ni–Al-based catalysts for autothermal reforming of dodecane

Jung, Soon Ki; Ju, Dong Geon; Lim, Eun Ji; Lee, Soo Chool; Hwang, Byung Wook; Kim, Jae Chang

doi:10.1016/j.ijhydene.2015.08.044

Cited by 29 publications

(18 citation statements)

References 38 publications

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“…For the NA10-IM catalyst, that was about 68.12% H 2 , 18.9% CO, 11.8% CO 2 , and 1.14% CH 4 . Although the product selectivity showed similar values, the dodecane conversion using the NA10-PM catalyst was higher than that obtained with NA10-IM, in agreement with a previous report [22,23]. In addition, NA10-PM exhibited a similar dodecane conversion (85.8%) as RhA5-IM.…”

Section: Catalytic Performance Comparison Of Na10-pm With Various Catsupporting

confidence: 89%

“…The obtained powder sample was dried at 250 • C and calcined at 750 • C for 4 h under air; in this procedure, all the solvents and PMMA were removed. The amount of nickel oxide in the catalyst was 10 wt%; thus, this sample was named NA10-PM [22,23]. To compare the catalytic properties of NA10-PM, nickel-alumina (NA10-IM), ruthenium-alumina (RuA5-IM), and rhodium-alumina (RhA5-IM) catalysts were also prepared by the conventional impregnation method (IM).…”

Section: Preparation Of Catalystsmentioning

confidence: 99%

“…However, the efficiencies of the catalysts prepared by impregnation were found to be lower than those of the catalysts prepared by co-precipitation. To complement the shortcomings of the preparation method, polymer-modified incipient method (PM method) was proposed [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Performance of an Auto-Reduced Nickel Catalyst for Auto-Thermal Reforming of Dodecane

Jung³

et al. 2018

Catalysts

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To investigate the catalytic performance of diesel reforming catalysts for production of hydrogen gas, Ni-Al catalyst was prepared by the polymer-modified incipient method (NA10-PM). NA10-PM showed excellent catalytic performance and economic feasibility in the auto-thermal reforming reaction, compared to other commercially available catalysts. In particular, auto-reduced NA10-PM showed higher dodecane conversion and similar selectivity at 750 °C compared to H2-reduced NA10-PM. X-ray diffraction (XRD) studies showed that the fresh state of NA10-PM initially automatically reduced by product gases through thermal decomposition of dodecane, and then NiAl2O4 was completely reduced to metallic nickel by the CO and H2 gases produced during the reaction. Additionally, catalytic performance of auto-reduced NA10-PM were investigated at varying steam/carbon molar ratio (S/C) and oxygen/carbon molar ratio (O2/C) in order to determine the optimum conditions of the auto-thermal reforming reaction. The conversion of dodecane over auto-reduced NA10-PM catalyst was remarkable (93%) and increased during the reaction, under conditions of S/C = 1.23, O2/C = 0.25, and gas hourly space velocity of 12,000 h−1 at 750 °C. The results of this study demonstrated that the auto-reduced NA10-PM catalyst was applied successfully for auto-thermal reforming of dodecane.

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Section: Catalytic Performance Comparison Of Na10-pm With Various Catsupporting

confidence: 89%

Section: Preparation Of Catalystsmentioning

confidence: 99%

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Performance of an Auto-Reduced Nickel Catalyst for Auto-Thermal Reforming of Dodecane

Jung³

et al. 2018

Catalysts

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“…The catalytic performances of N10A and F10N10A deteriorated significantly within 1 hour and, thereafter, the conversions remained the same as that of the blank test, which suggests that the catalysts were completely deactivated. The addition of Fe as a promoter to Ni-Al-based catalysts enhances carbon coking and the sulfur poisoning resistance, as reported in our previous study [42]. However, this addition had a negative effect in the presence of the aromatic hydrocarbon.…”

Section: Catalytic Performances In the Absence And Presence Of Aromatsupporting

confidence: 75%

“…In our previous studies, a polymer modified incipient method (PM) was introduced as a timesaving and promising alternative preparation method to conventional preparation methods, such as impregnation or co-precipitation methods [41]. Moreover, sulfur-resistant Ni-Al-based catalysts with added Fe promoters were prepared by means of the PM method for autothermal reforming of dodecane [42]. The role of these catalysts in diesel surrogate fuel containing aromatic hydrocarbons has, however, remained unexplored.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Ni-Al-Based Catalysts and Influence of Aromatic Hydrocarbon for Autothermal Reforming of Diesel Surrogate Fuel

et al. 2019

Catalysts

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Aromatic hydrocarbons along with sulfur compounds in diesel fuel pose a significant threat to catalytic performances, due mainly to carbon deposition on the catalytic surface. In order to investigate the influence of an aromatic hydrocarbon on the autothermal reforming of diesel fuel, 1-methylnaphthalene (C11H10) was selected as an aromatic hydrocarbon. Two types of diesel surrogate fuel, i.e., DH (dodecane (C12H26) and hexadecane (C16H34) mixture) as well as DHM (DH fuel and C11H10 mixture) fuel, were prepared. A Rh-Al-based catalyst (R5A-I) was prepared using a conventional impregnation method. Various Ni-Al-based catalysts with Fe and Rh promoters were prepared via a polymer modified incipient method to improve the carbon coking resistance. These catalysts were tested under conditions of S/C = 1.17, O2/C = 0.24, 750 °C, and GHSV = 12,000 h-1 at DH or DHM fuel. R5A-I exhibited excellent catalytic performance in both DH and DHM fuels. However, carbon coking and sulfur poisoning resistance were observed in our previous study for the Ni-Al-based catalyst with the Fe promoter, which became deactivated with increasing reaction time at the DHM fuel. In the case of the Rh promoter addition to the Ni-Al-based catalysts, the catalytic performances decreased relatively slowly with increasing (from 1 wt.% (R1N50A) to 2 wt.% (R2N50A)) content of Rh2O3 at DHM fuel. The catalysts were analyzed via scanning electron microscopy combined with energy dispersive X-ray, X-ray diffraction, and X-ray photoelectron spectroscopy. Gas chromatography-mass spectrometry detected various types of hydrocarbons, e.g., ethylene (C2H4), with catalyst deactivation. The results revealed that, among the produced hydrocarbons, C2H4 played a major role in accelerating carbon deposition that blocks the reforming reaction. Therefore, Rh metal deserves consideration as a carbon coking inhibitor that prevents the negative effects of the C2H4 for autothermal reforming of diesel fuel in the presence of aromatic hydrocarbons.

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Techniques for Overcoming Sulfur Poisoning of Catalyst Employed in Hydrocarbon Reforming

2021

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Study of sulfur-resistant Ni–Al-based catalysts for autothermal reforming of dodecane

Cited by 29 publications

References 38 publications

Performance of an Auto-Reduced Nickel Catalyst for Auto-Thermal Reforming of Dodecane

Performance of an Auto-Reduced Nickel Catalyst for Auto-Thermal Reforming of Dodecane

Enhanced Ni-Al-Based Catalysts and Influence of Aromatic Hydrocarbon for Autothermal Reforming of Diesel Surrogate Fuel

Techniques for Overcoming Sulfur Poisoning of Catalyst Employed in Hydrocarbon Reforming

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