Oxy-steam reforming of methanol on copper catalysts

Mierczyński, Paweł; Mosińska, Magdalena; Maniukiewicz, Waldemar; Nowosielska, Magdalena; Czylkowska, Agnieszka; Szynkowska, M. I.

doi:10.1007/s11144-019-01609-6

Cited by 11 publications

(17 citation statements)

References 52 publications

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“…On the other hand, the lack of the diffraction peak which is attributed to the CuO phase confirmed that the copper(II) oxide present on the catalyst surface was totally reduced in the studied condition (in a mixture of 5% H 2 -95% Ar at 300 • C for 1 h and reaction performed in OSRM process). In addition, the lack of metallic Cu and/or Ni particles in the diffraction patterns recorded for bimetallic catalysts may be also explained by the too small size of the crystallites to detect by the diffractometer [21,30]. The presence of other phases in the diffraction patterns were not confirmed by the X-ray diffraction technique.…”

Section: Resultsmentioning

confidence: 95%

“…It is worth noting that 30% Cu-10% Ni/ZrO 2 ·Al 2 O 3 catalyst exhibited the highest hydrogen yield and the highest methanol conversion at 160 • C. However, the 30% Cu-10% Ni/ZrO 2 ·Al 2 O 3 catalyst exhibited lower selectivity to CO 2 production and higher selectivity toward CO formation compared to the 30% Cu-10% Ni/CeO 2 ·Al 2 O 3 and 30% Cu-10% Ni/ZnO·Al 2 O 3 systems. DME was not formed during the OSRM reaction in any of the investigated catalyst systems [21]. Lopez et al [10] also investigated Cu-Ni/ZrO 2 catalysts prepared via co-impregnation and subsequent impregnation methods and tested in the OSRM process.…”

Section: Resultsmentioning

confidence: 99%

“…The process was carried out in the temperature range 120-250 • C. In each experiment, the catalyst load was about 0.2 g and the reaction mixture composition was following: H 2 O:CH 3 OH:O 2 = 1:1:0.4 (molar ratio) and the GHSV was 26,700 h −1 . The analyses of the obtained products were performed using GC analysis (a description of chromatographic analysis was presented in our previous work [21,26]). The selectivity values of the obtained products were calculated based on following equations presented below:…”

Section: Catalytic Testmentioning

confidence: 99%

“…The purpose of the presented work was to develop cheap and efficient catalytic systems operating in the oxidative steam reforming of methanol process. Based on previous investigations, we decided to prepare bimetallic copper-nickel supported catalysts instead of copper or nickel catalysts promoted by noble elements [21][22][23][24][25]. Copper and nickel catalysts are much cheaper and are characterized by high activity and selectivity in OSRM [5,21,25,26].…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

et al. 2020

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In this work, bimetallic Cu-Ni catalysts supported on binary oxides containing ZnO, ZrO 2 , CeO 2 and Al 2 O 3 were investigated in hydrogen production via the oxidative steam reforming of methanol (OSRM). Their physicochemical properties were extensively studied using various methods such as BET, TPR-H 2 , TPD-NH 3 , XRD, SEM-EDS, ToF-SIMS and XPS. The reactivity measurements showed that the active phase and support composition played an important role in the activity of the catalyst in the OSRM. The most active system at higher temperatures was 30% Cu-10% Ni/CeO 2 ·Al 2 O 3 , with high catalytic activity attributed to the Cu 0.8 Ni 0.2 alloy formation. In addition, the reactivity results showed that the most active catalyst exhibited high acidity and was easily reduced. At low temperatures, the best catalytic properties were exhibited by 30% Cu-10% Ni/ZrO 2 ·Al 2 O 3 . The reactivity and physicochemical properties of the studied catalysts confirmed the crucial role of alloy composition on their catalytic properties in the oxy-steam reforming of methanol. The obtained results validate the possibility of using Cu-Ni catalysts for hydrogen production.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Catalytic Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

et al. 2020

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“…Time-of-flight secondary ion mass spectrometry (ToF-SIMS) results also confirmed a strong interaction of NiO with ZrO 2 in the case of the 20%Ni/ZrO 2 catalysts. The presence of selected NiZrO + ions emitted from the investigated surface of the 20%Ni/ZrO 2 system was detected.Catalysts 2020, 10, 346 2 of 21 purity hydrogen, which is directly related to the use of fuel cell technology [1][2][3][4][5]. Currently, the main technologies of the hydrogen production are based on the steam reforming of natural gas.…”

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confidence: 99%

Hydrogen Production via the Oxy-Steam Reforming of LNG or Methane on Ni Catalysts

et al. 2020

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Ni catalysts supported on ZrO2, 5%CeO2-ZrO2, and 5%La2O3-ZrO2 were prepared via the impregnation method and tested in the oxy-steam reforming of methane and liquified natural gas (LNG). All tested catalysts exhibited high catalytic activity in the studied process at 700 and 900 °C. The improvement of the stability of Ni catalysts after the addition of CeO2 oxide in the studied oxy-steam reforming of LNG process was confirmed. In addition, high activity and selectivity towards hydrogen was proven in the oxy-steam reforming process at 900 °C over a 20%Ni/5%CeO2-ZrO2 catalyst. It was also proved that the addition of CeO2 onto a ZrO2 carrier leads to a decrease in the NiO and metallic Ni crystallite sizes that were detected by the X-Ray diffraction (XRD) technique. The solid solution formation between NiO and ZrO2 and/or NiO and CeO2 was proved. Superior reactivity in the oxy-steam reforming of CH4 and the LNG process exhibited a 20%Ni/ZrO2 catalyst, which showed the highest methane conversions at 500 and 600 °C, equal to 63% and 89%, respectively. In addition, also in the case of the LNG reforming reaction, the most active catalyst was the 20%Ni/ZrO2 system, which demonstrated 46.3% and 76.9% of the methane conversion value at 500 and 600 °C and the total conversion of others hydrocarbons (ethane, propane and butane). In addition, this catalytic system exhibited the highest selectivity towards hydrogen formation in the oxy-steam reforming of the LNG reaction equal to 71.2% and 71.3% at 500 and 600 °C, respectively. The highest activity of this system can be explained by the uniform distributions of Ni species and their highest concentration compared to the rest of the monometallic Ni catalysts. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) results also confirmed a strong interaction of NiO with ZrO2 in the case of the 20%Ni/ZrO2 catalysts. The presence of selected NiZrO+ ions emitted from the investigated surface of the 20%Ni/ZrO2 system was detected.

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Blocking Methanation during Reverse Water Gas Shift Reaction on Ni/SiO₂ Catalysts by Surface Ag

Zhang

Liu

et al. 2023

ChemCatChem

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Reverse water gas shift (RWGS) reaction is an attractive approach to convert CO 2 with renewable H 2 to produce CO. However, this reaction is always accompanied by undesirable methanation reaction lowering the CO selectivity, particularly, at low reaction temperature and on Ni catalysts. Herein, a strategy of deposition of inert Ag on the surface of Ni to block methanation reaction during RWGS for selective conversion of CO 2 toward CO was reported. Characterizations showed that in contrast to formation of bulk NiÀ Ag alloy, both Ag particle and highly dispersed Ag are direct contacting with Ni particle. Surface Ag modifies the property of Ni geometrically and electronically, resulting in reduced accessible surface Ni sites and Ni ensemble size, as well as electron transfer from Ni to Ag. Consequently, both the amount and strength of CO adsorption are reduced, which facilitates CO desorption and reduces CO methanation activity. The Ag modification tunes Ni/SiO 2 from selective methanation to selective RWGS, with 100 % CO selectivity on Ni-0.3 Ag/SiO 2 (Ag/Ni = 0.3) at 400 °C with gas hourly space velocity (GHSV) > 300 L g À 1 h À 1 and CO selectivity is > 80.7 % even at a low GHSV of 15 L g À 1 h À 1 . Moreover, the Ni-0.3 Ag/SiO 2 appears to be very stable for RWGS reaction.

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Oxy-steam reforming of methanol on copper catalysts

Cited by 11 publications

References 52 publications

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production via the Oxy-Steam Reforming of LNG or Methane on Ni Catalysts

Blocking Methanation during Reverse Water Gas Shift Reaction on Ni/SiO₂ Catalysts by Surface Ag

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Oxy-steam reforming of methanol on copper catalysts

Cited by 11 publications

References 52 publications

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production via the Oxy-Steam Reforming of LNG or Methane on Ni Catalysts

Blocking Methanation during Reverse Water Gas Shift Reaction on Ni/SiO2 Catalysts by Surface Ag

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Blocking Methanation during Reverse Water Gas Shift Reaction on Ni/SiO₂ Catalysts by Surface Ag