Highly Dispersed and Stable Ni/SBA-15 Catalyst for Reverse Water-Gas Shift Reaction

Liu, Hui; Wang, Luhui

doi:10.3390/cryst11070790

Cited by 4 publications

(3 citation statements)

References 40 publications

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“…For NiO/SBA-15, there exists a reduction peak at low reduction temperature attributed to the reduction of large undispersed particles of NiO weakly interacting with the SBA-15 support. Also, the broad peak and higher reduction peak at >500 °C reduction temperature are attributed to the reduction of highly dispersed NiO strongly interacting with the SBA-15 support. , For BiO x /SBA-15, two peaks attributed to the reduction of Bi 2 O 3 and Bi 2 SiO 5 , at low (550 °C) and relatively high (750 °C) reduction temperatures, respectively, were observed. The bimetallic Ni-BiO x /SBA-15 catalyst showed a broad peak extending from 400 to 850 °C instead of highly dispersed NiO strongly interacting with the SBA-15 support in NiO/SBA-15.…”

Section: Resultsmentioning

confidence: 91%

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiO_x Metal Oxides Supported on Mesoporous SBA-15

Tanimu

Al-Qathmi

Aitani

et al. 2023

Ind. Eng. Chem. Res.

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A Ni-BiO x /SBA-15 catalyst synthesized using a co-impregnation method was utilized for the oxidative dehydrogenation (ODH) of n-butenes (1butene and 2-butene) to 1,3-butadiene in a fixed-bed reactor. The layered structure of NiO/β-Bi 2 O 3 /Bi 2 SiO 5 /SBA-15 was confirmed using porosity, XRD, and H 2 -TPR measurements. The components of the structure interacted moderately to form an effectively active and selective NiO species as an ODH catalyst. Thermodynamic analysis results revealed the most favorable pathway for butene conversion; however, this catalyst kinetically favored the desired and efficient route of butene conversion via adsorption of butenes, abstraction of αhydrogen, and the formation of highly selective 1,3-butadiene. The selectivity of the oxygen species in the metal oxide system along the efficient route was sustained by co-feeding gas phase oxygen and increasing the reaction temperature. The catalyst comprising 14 wt % Ni-10 wt % Bi-O/SBA-15 exhibited a 2-butene conversion of 83% and a 1,3-butadiene selectivity of 89% at 400 °C and O 2 /C 4 = ratio = 4.0 mol/mol.

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Section: Resultsmentioning

confidence: 91%

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiO_x Metal Oxides Supported on Mesoporous SBA-15

Tanimu

Al-Qathmi

Aitani

et al. 2023

Ind. Eng. Chem. Res.

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“…This process is also known as the CO 2 -FTS mechanism, where the CO produced from the RWGS reaction is inserted into the *CH 3 or *CH 3 (CH 2 ) n generated from the CO-FTS mechanism to form methanol, ethanol, or other higher alcohol synthesis [312,313]. The RWGS reaction is an endothermic process favored at high temperatures, resulting in a high equilibrium conversion of CO 2 and performed at relatively low contact times [307,314].…”

Section: Ethanol Synthesis Based On Rwgsmentioning

confidence: 99%

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

et al. 2023

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On the basis of its properties, ethanol has been identified as the most used biofuel because of its remarkable contribution in reducing emissions of carbon dioxide which are the source of greenhouse gas and prompt climate change or global warming worldwide. The use of ethanol as a new source of biofuel reduces the dependence on conventional gasoline, thus showing a decreasing pattern of production every year. This article contains an updated overview of recent developments in the new technologies and operations in ethanol production, such as the hydration of ethylene, biomass residue, lignocellulosic materials, fermentation, electrochemical reduction, dimethyl ether, reverse water gas shift, and catalytic hydrogenation reaction. An improvement in the catalytic hydrogenation of CO2 into ethanol needs extensive research to address the properties that need modification, such as physical, catalytic, and chemical upgrading. Overall, this assessment provides basic suggestions for improving ethanol synthesis as a source of renewable energy in the future.

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“…The possibility of CO 2 reduction through the reverse water gas shift reaction has been established. Liu et al (2021) formulated a catalyst denoted as 1% Ni/ SBA-15(P), recognizing for its high CO 2 conversion efficiency and robust stability in the reaction. Under a temperature of 700 °C, the CO 2 conversion reached 33.7%.…”

Section: Graphical Abstract 1 Introductionmentioning

confidence: 99%

Variable frequency microwave induced CO2 Boudouard reaction over biochar

Ren,

Jiang,

Wang

et al. 2024

Biochar

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The Boudouard reaction presents promising application prospects as a straightforward and efficient method for CO2 conversion. However, its advancement is hindered primarily by elevated activation energy and a diminished conversion rate. This study employed a microwave reactor with a variable frequency as the initial approach to catalyze the CO2 Boudouard reaction over biochar, with the primary objective of producing renewable CO. The study systematically investigated the influence of various variables, including the heating source, microwave frequency, microwave power, gas hourly space velocity (GHSV), and carrier gas, on the conversion of CO2 and the selectivity towards CO. The experimental findings indicate that under static conditions, with a fixed microwave frequency set at 2450 MHz and 100 W microwave power, the Boudouard reaction did not initiate. Conversely, a CO2 conversion rate of 8.8% was achieved when utilizing a microwave frequency of 4225 MHz. Under this unique frequency, further elevating the microwave power to 275 W leads to the complete conversion of CO2. Furthermore, a comparative analysis between microwave and electrical heating revealed that the CO production rate was 37.7 μmol kJ−1 for microwave heating, in stark contrast to the considerably lower rate of 0.2 μmol kJ−1 observed for electric heating. Following the reaction, the biochar retained its robust 3D skeleton structure and abundant pore configuration. Notably, the dielectric constant increased by a factor of 1.8 compared to its initial state, rendering it a promising microwave-absorbing material. Graphical Abstract

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Highly Dispersed and Stable Ni/SBA-15 Catalyst for Reverse Water-Gas Shift Reaction

Cited by 4 publications

References 40 publications

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiO_x Metal Oxides Supported on Mesoporous SBA-15

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiO_x Metal Oxides Supported on Mesoporous SBA-15

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

Variable frequency microwave induced CO2 Boudouard reaction over biochar

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Highly Dispersed and Stable Ni/SBA-15 Catalyst for Reverse Water-Gas Shift Reaction

Cited by 4 publications

References 40 publications

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiOx Metal Oxides Supported on Mesoporous SBA-15

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiOx Metal Oxides Supported on Mesoporous SBA-15

Recent Advances in the Technologies and Catalytic Processes of Ethanol Production

Variable frequency microwave induced CO2 Boudouard reaction over biochar

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Product

Resources

About

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiO_x Metal Oxides Supported on Mesoporous SBA-15

Oxidative Dehydrogenation of n-Butenes to 1,3-Butadiene over Ni-BiO_x Metal Oxides Supported on Mesoporous SBA-15