Kinetics of sulfur-resistant methanation over supported molybdenum-based catalyst

Li, Zhenhua; Wang, Weihan; Qu, Jianglei; Tian, Ye; Wang, Baowei; Ma, Xinbin

doi:10.1016/j.jtice.2016.08.043

Cited by 13 publications

(10 citation statements)

References 21 publications

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“…In the experiment, the total flow gas was kept constant and only the weight of the catalyst was changed to obtain the activation energy ( E a ) (Figure S2). On the basis of the experiment, an E a of approximately 23.45 kJ mol −1 was obtained on the MoS 2 ‐Al 2 O 3 /Ni‐foam catalyst, which is in agreement with the reported results for MoS 2 ‐based catalysts such as the MoS 2 /CeO 2 ‐Al 2 O 3 catalyst ,…”

Section: Figuresupporting

confidence: 91%

Molybdenum Disulfide–Alumina/Nickel‐Foam Catalyst with Enhanced Heat Transfer for Syngas Sulfur‐Resistant Methanation

Zhang

Tang

et al. 2017

ChemCatChem

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Sulfur‐resistant CO methanation by using MoS2‐based catalysts possesses potential to produce synthetic natural gas from the direct use of un‐desulfurized syngas with a low H2/CO ratio in industry. However, hotspots raised in the high exothermic reaction lead to catalyst deactivation and an uncontrollable reactor temperature, both of which hinder industrial applications. A metal‐structured MoS2‐Al2O3/Ni‐foam catalyst with stable MoS2 active species and high heat‐transfer efficiency was synthesized to resist deactivation and to remove the heat of the reaction through a hydrothermal synthesis process. This catalyst exhibited superior activity and stability in the sulfur‐resistant methanation of syngas and has potential applications in highly exothermic and endothermic reactions.

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Section: Figuresupporting

confidence: 91%

Molybdenum Disulfide–Alumina/Nickel‐Foam Catalyst with Enhanced Heat Transfer for Syngas Sulfur‐Resistant Methanation

Zhang

Tang

et al. 2017

ChemCatChem

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“…Its usefulness as a tool with simplicity has been demonstrated and also recommended in many research works such as the simulation of fuel processing reactors [28] and the determination of reaction kinetics parameters [29,30]. The empirical power-law model for methanation coupling with water gas shift could be defined as the following equations [16,22,31]:…”

Section: Empirical Power-law Modelmentioning

confidence: 99%

“…In our previous work [13,14], the Re-promoted Ni catalyst was also studied, and it was found that the addition of Re promoter could effectively enhance the synergistic performance for methanation coupling with water gas shift of biogas from both structural and electronic aspects. At the present stage, Ni-based catalyst is in fact the priority choice as an industrial catalyst considering its high activity and relatively low market price [15,16]. The application of Ni-based catalyst is thus comprehensively more competitive in the process of biogas upgrading.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic Kinetics Study of Biogas Methanation Coupling with Water Gas Shift over Re-Promoted Ni Bifunctional Catalysts

et al. 2019

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The intrinsic kinetics of biogas methanation coupling with water gas shift over Re-promoted Ni bifunctional catalysts were investigated in this study. The catalysts were prepared through co-impregnation of Ni and Re precursors on the H2O2-modified manganese sand. The experiments were performed in a fixed bed reactor under the assorted reaction conditions of 300–400 °C, 0.1–0.3 MPa, and a 0.6–1.0 H2/CO ratio. The effect of gas internal and external diffusion on the performance of methanation coupling with water gas shift was examined by changing catalyst particle size and gas hourly space velocity (GHSV) and further verified by the Weisz–Prater and Mears criterion, respectively. It was found that the internal and external diffusions were eliminated when the catalyst particle size was 12–14 meshes and GHSV was 2000 h−1. Three kinetics models including the empirical model (EM), synergetic model (SM), and independent model (IM) were proposed, and 25 sets of experimental data were obtained to solve the model parameters. By mathematical fitting and analysis, it was discovered that the fitting situation of the three kinetics models was in the order of EM > SM > IM, among which EM had the highest fitting degree of 99.7% for CH4 and 99.9% for CO2 with the lowest average relative error of 8.9% for CH4 and 8.7% for CO2. The over 30% of average relative error for CO2 in IM might exclude the possibility of the Langmuir–Hinshelwood water gas shift mechanism in the real steps of biogas methanation coupling with water gas shift over Re-promoted Ni catalysts.

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“…However, the natural gas resources continue to decrease and the price of natural gas continues to increase. Thus, the CO methanation reaction has been used to produce synthetic natural gas from olefins and coal …”

Section: Introductionmentioning

confidence: 99%

Effect of Fe‐Containing Supports Prepared by a Novel Sol–Gel Method in the CO Methanation Reaction: CO Elimination and Synthetic Natural Gas Production

et al. 2019

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Herein, the CO methanation reaction is studied over Ni/Fe–Al mixed oxides with various Fe and Al contents. The mesoporous nanocrystalline supports are prepared by a novel sol–gel process using propylene oxide as a gelation agent. The deposition–precipitation method is used for the deposition of nickel on the catalyst support. The samples are characterized by Brunauer–Emmett–Teller (BET), X‐ray diffractometry (XRD), temperature programmed reduction (TPR), temperature programmed oxidation (TPO), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The results indicate that increasing the iron content and reducing the Al percentage in the catalyst support reduces the specific surface area of the supports from 340 to 8 m2 g−1 and improves the reducibility of nickel in the prepared catalysts. The catalytic results of pre‐reduced catalysts show superior activity for CO elimination even at temperatures below 260 °C. The nonreduced catalysts reveal that the catalysts with a higher content of iron in the catalyst support show higher activity at lower temperatures. However, due to the lower thermal stability of iron oxide compared with that of aluminum oxide and exothermic nature of the CO methanation reaction, the catalysts with a higher content of iron exhibit lower stability during the reaction.

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Kinetics of sulfur-resistant methanation over supported molybdenum-based catalyst

Cited by 13 publications

References 21 publications

Molybdenum Disulfide–Alumina/Nickel‐Foam Catalyst with Enhanced Heat Transfer for Syngas Sulfur‐Resistant Methanation

Molybdenum Disulfide–Alumina/Nickel‐Foam Catalyst with Enhanced Heat Transfer for Syngas Sulfur‐Resistant Methanation

Intrinsic Kinetics Study of Biogas Methanation Coupling with Water Gas Shift over Re-Promoted Ni Bifunctional Catalysts

Effect of Fe‐Containing Supports Prepared by a Novel Sol–Gel Method in the CO Methanation Reaction: CO Elimination and Synthetic Natural Gas Production

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