Rh promoted and ZrO2/Al2O3 supported Ni/Co based catalysts: High activity for CO2 reforming, steam–CO2 reforming and oxy–CO2 reforming of CH4

Al‐Fatesh, Ahmed S.; Singh, Sunit Kumar; Kanade, Gajanan S.; Atia, Hanan; Fakeeha, Anis H.; Ibrahim, Ahmed A.; El‐Toni, Ahmed Mohamed; Labhasetwar, Nitin

doi:10.1016/j.ijhydene.2018.04.152

Cited by 89 publications

(35 citation statements)

References 59 publications

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“…For this reason, the utilization of an effective catalyst is essential. For instance, the use of noble metals such as Pt, Rh, Pd, Ru, and Ir distributed on support are competently used for dry reforming of CH 4 [14][15][16]. Arandiyan et al [17] investigated the effect of noble metals on crystallize sizes.…”

Section: Introductionmentioning

confidence: 99%

Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts

et al. 2020

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Dry reforming of methane (DRM) was studied in the light of Ni supported on 8%PO 4 + ZrO 2 catalysts. Cerium was used to modify the Ni active metal. Different percentage loadings of Ce (1%, 1.5%, 2%, 2.5%, 3%, and 5%) were tested. The wet incipient impregnation method was used for the preparation of all catalysts. The catalysts were activated at 700 • C for 1 2 h. The reactions were performed at 800 • C using a gas hourly space velocity of 28,000 mL (h·gcat) −1 . X-ray diffraction (XRD), N 2 physisorption, hydrogen temperature programmed reduction (H 2 -TPR), temperature programmed oxidation (TPO), temperature programmed desorption (TPD), and thermogravimetric analysis (TGA) were used for characterizing the catalysts. The TGA analysis depicted minor amounts of carbon deposition. The CO 2 -TPD results showed that Ce enhanced the basicity of the catalysts. The 3% Ce loading possessed the highest surface area, the largest pore volume, and the greatest pore diameter. All the promoted catalysts enhanced the conversions of CH 4 and CO 2 . Among the promoted catalysts tested, the 10Ni + 3%Ce/8%PO 4 + ZrO 2 catalyst system operated at 1 bar and at 800 • C gave the highest conversions of CH 4 (95%) and CO 2 (96%). The stability profile of Cerium-modified catalysts (10%Ni/8%PO 4 + ZrO 2 ) depicted steady CH 4 and CO 2 conversions during the 7.5 h time on stream.Catalysts 2020, 10, 242 2 of 16 the dry reforming of CH 4 . They tested the catalytic activity over La 0.4 M 0.6 Al 0.2 Ni 0.8 O 3 (M = Pt, Pd, Ru, Rh, Ir) perovskite-type oxides with a surface area of 3.26-4.14 m 2 /g. It was obtained that the La 0.4 Rh 0.6 Al 0.2 Ni 0.8 O 3 catalyst revealed the best catalytic performance due to its high surface area, surface oxygen concentration, and good low-temperature reducibility. El Hassan et al. [18] studied the influence of Rh (0.2 and 0.5 wt %) to the Co/SBA-15 catalyst in the catalytic performance of dry reforming of CH 4 . It was found that Rh favored Co stabilization in the mesopores and was reduced at a much lower temperature. The nature of coke was affected and less γ-carbon formed on the Rh-containing sample. However, because of the high prices and limited availability of noble metals, the research has also focused on transition metals such as Co, Ni, Ti, which are broadly used for this process because of their high activity [19]. However, these catalysts are prone to quick deactivation due to coke deposition. Within the catalysts, Ni depicted the greatest performance due to its strong ability to break C-C/C-H bonds and activate CH 4 [20]. AKri et al. [21] elaborated the dry reforming of CH 4 employing atomically dispersed Ni atoms, stabilized by interaction with Ce-doped hydroxyapatite. Their results evidenced that the catalyst was very active and that isolated Ni atoms were inherently coke resistant. Ce doping of hydroxyapatite brought strong metal-support interactions which stabilized Ni single atoms toward sintering and favored the selective activation of only the first C-H bond in CH 4 . Goula et al. [22] inves...

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Section: Introductionmentioning

confidence: 99%

Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts

et al. 2020

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“…These results suggest that both fluorite-perovskite composite systems are thermally stable throughout the operative temperature range. Moreover, it is important www.springer.com/journal/40145 to mention that this temperature range matches with the operative temperatures for certain reactors that utilize ceramic membranes; for example, to produce syngas through the so-called dry reforming and the oxy-dry reforming of methane the operative temperatures are typically between 700 and 875 ℃ [13,35,36].…”

Section: Thermochemical Stability Under Air and Co 2 Rich Atmospheresmentioning

confidence: 99%

Mixed-conducting ceramic-carbonate membranes exhibiting high CO2/O2 permeation flux and stability at high temperatures

et al. 2020

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This investigation demonstrates the feasibility to fabricate high quality ceramic-carbonate membranes based on mixed-conducting ceramics. Specifically, it is reported the simultaneous CO 2 /O 2 permeation and stability properties of membranes constituted by a combination of ceramic and carbonate phases, wherein the microstructure of the ceramic part is composed, in turn, of a mixture of fluorite and perovskite phases. These ceramics showed ionic and electronic conduction, and at the operation temperature, the carbonate phase of the membranes is in liquid state, which allows the transport of CO 3 2and O 2species via different mechanisms. To fabricate the membranes, the ceramic powders were uniaxially pressed in a disk shape. Then, an incipient sintering treatment was carried out in such a way that a highly porous ceramic was obtained. Afterwards, the piece is densified by the infiltration of molten carbonate. Characterization of the membranes was accomplished by SEM, XRD, and gas permeation techniques among others. Thermal and chemical stability under an atmosphere rich in CO 2 was evaluated. CO 2 /O 2 permeation and long-term stability measurements were conducted between 850 and 940 ℃. The best permeation-separation performance of membranes of about 1 mm thickness, showed a maximum permeance flux of about 4.46×10-7 mol•m-2 •s-1 •Pa-1 for CO 2 and 2.18×10-7 mol•m-2 •s-1 •Pa-1 for O 2 at 940 ℃. Membranes exhibited separation factor values of 150-991 and 49-511 for CO 2 /N 2 and O 2 /N 2 respectively in the studied temperature range. Despite long-term stability test showed certain microstructural changes in the membranes, no significant detriment on the permeation properties was observed along 100 h of continuous operation.

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“…Moreover, several researchers provided experimental data on the synergistic effect demonstrated by Ni-Co bimetallic-based catalysts as a proficient tactic for insuring high activity and stability under harsh CSDRM conditions (Ref. [50] , Table 4 ). Alloying Ni with Co decreases average Ni 0 particle size to an extent where nanoparticles display sizes below the critical limit (size of Ni 0 nanospecies around 6 ( ± 2) nm [133] ) viewed essential for initiation of C (s) nucleation and their subsequent growth.…”

Section: Bimetallic Synergetic Effectmentioning

confidence: 99%

Tuning combined steam and dry reforming of methane for “metgas” production: A thermodynamic approach and state-of-the-art catalysts

Jabbour

2020

Journal of Energy Chemistry

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Rh promoted and ZrO2/Al2O3 supported Ni/Co based catalysts: High activity for CO2 reforming, steam–CO2 reforming and oxy–CO2 reforming of CH4

Cited by 89 publications

References 59 publications

Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts

Dry Reforming of Methane Using Ce-modified Ni Supported on 8%PO4 + ZrO2 Catalysts

Mixed-conducting ceramic-carbonate membranes exhibiting high CO2/O2 permeation flux and stability at high temperatures

Tuning combined steam and dry reforming of methane for “metgas” production: A thermodynamic approach and state-of-the-art catalysts

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