n-Dodecane steam reforming catalyzed by Ni-Ce-Pr catalysts. Part 1: Catalyst preparation and Pr doping

Xiao, Zhourong; Ji, Shuang; Hou, Fang; Li, Yueting; Zhang, Haocui; Wang, Li; Zhang, Xiangwen; Liu, Guozhu; Zou, Ji‐Jun; Li, Guozhu

doi:10.1016/j.cattod.2018.02.036

Cited by 24 publications

(14 citation statements)

References 53 publications

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“…Thus, the production rate of gas product can be calculated according to the content of nitrogen. The conversion of n ‐dodecane, gas production rate were determined by the following equations as our reported literature …”

Section: Methodssupporting

confidence: 67%

“…Its average HPR is 6588.6 μmol/min. On 10Ni‐CePr 2 ‐600‐IMP, sharply reduced n ‐dodecane conversion and HPR indicate the less stability of the catalyst prepared by traditional impregnation method . For the 10Ni‐CePr 2 ‐700 catalyst, the initial n ‐dodecane conversion was 98.6%, and the HPR is higher than 7104.7 μmol/min.…”

Section: Resultsmentioning

confidence: 92%

“…Our catalysts were synthesized by a sol‐gel method which is similar to that in our previous work . The catalysts are named as yNi‐CePr x ‐T.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous works, Pr‐doped ceria as abundant oxygen vacancy support was employed in n ‐dodecane steam reforming, which showed good prospects for real application . The preparation procedure of the solid oxide catalyst plays a vital role on affecting their stability and activity.…”

Section: Introductionmentioning

confidence: 99%

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Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

et al. 2019

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Summary Nowadays, the development of fuel cell is getting more and more inseparable from the production of hydrogen. Long‐chain hydrocarbons steam reforming is a feasible way for hydrogen supply. Herein, various nickel‐ceria‐praseodymium (Ni‐Ce‐Pr) catalysts have been prepared by a sol‐gel method. Multiple parameters during catalyst preparation, including the amount of Ni, the content of doped Pr and the calcination temperature, were systematically studied for tuning the catalytic performance for n‐dodecane steam reforming in a fixed‐bed reactor under 15 mL/gcat·h at 600°C and water‐to‐carbon molar ratio of 2 at 0.1 MPa. Reaction data showed that both the amount of Ni and the content of doped Pr will greatly affect the n‐dodecane conversion and hydrogen production. Additionally, the calcination temperature during catalyst preparation showed a big influence on its performance for n‐dodecane steam reforming. After optimization, 10Ni‐CePr2‐600 exhibits the highest activity and stability for n‐dodecane steam reforming, accompanying with the lowest rate of coke deposition (0.015 gc/gcat·h). The structure and oxygen vacancy of the catalyst was characterized by H2‐TPR, Raman, and X‐ray photoelectron spectroscopy (XPS). The superior activity and stability of 10Ni‐CePr2‐600 are ascribed to the strong interaction between NiO and support along with abundant oxygen vacancies in the Pr‐doped ceria.

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Section: Methodssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 92%

“…Our catalysts were synthesized by a sol‐gel method which is similar to that in our previous work . The catalysts are named as yNi‐CePr x ‐T.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

et al. 2019

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“…Metal NPs are easily aggregated and can not be seperated from feedstock, which constrains their industial application. Various supports, like CeO 2 , TiO 2 , Zeolite, mesoporous carbons and reduced graphene oxide (rGO), had been introduced to stabilize these active NPs. rGO is a kind of merterial with single‐atom‐thick sheet of sp 2 ‐bonded carbon atom, with special two‐dimensional structure and copious electrons.…”

Section: Resultsmentioning

confidence: 99%

Toward an Understanding of Capping Molecules on Pt Nanoparticles for Hydrogenation: the Key Role of Hydroxyl Groups

Hou

Sun

et al. 2019

ChemistrySelect

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Preparation of active and stable platinum nanoparticles (Pt NPs) for hydrogenation is of great importance. Herein, a joint experimental and theoretical study has been conducted to investigate the role of capping molecules on Pt NPs for hydrogenation. Both small biomolecules of adenine, D‐ribose, adenosine, and 2′‐deoxyadenosine and macromolecule of dextran have been studied as capping agents of Pt NPs. Kinetic data are collected and fitted for deep insight and clear comparison of Pt activity. TEM, SEM, XRD, nitrogen adsorption‐desorption were employed to characterize the obtained catalysts. DFT calculations have been carried out to investigate the exact interactions in this system. A volcano plot is obtained between the adsorption energy of 4‐NP on various Pt NPs against reaction rate constant (k), which is in accordance with the Brønsted‐Evans‐Polanyi (BEP) relation. Moreover, active and stable catalyst (Pt/rGO) has been prepared using dextran as capping agent and rGO as support. The hydrogenation of 4‐NP over Pt/rGO can reach 100% conversion in only 2 min. The catalyst can still maintain its activity after solvent removal and long‐time storage.

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Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

et al. 2022

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To obtain high yields of hydrogen, a series of Zr x Pr 1-x O y -supported cobalt catalysts were synthesized by the sol-gel method and tested in autothermal reforming (ATR) of acetic acid (HAc) derived from bio-oil. X-ray diffraction, nitrogen physisorption, H 2 -temperature-programmed reduction, and thermogravimetric analysis were conducted to investigate the factors affecting the activities of the catalysts. Over the Co-Zr-Pr-O catalyst, a Zr x Pr 1-x O y solid solution was formed after calcination; meanwhile, the active component of Co 0 was highly dispersed over the solid solution after reduction in hydrogen for 1 h at 700 °C. As a result, stable reactivity was recorded in the ATR process of HAc: the hydrogen yield reached 2.58 mol H2 mol À1HAc with near 100 % HAc conversion, while better resistance to coking was observed.

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n-Dodecane steam reforming catalyzed by Ni-Ce-Pr catalysts. Part 1: Catalyst preparation and Pr doping

Cited by 24 publications

References 53 publications

Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

Toward an Understanding of Capping Molecules on Pt Nanoparticles for Hydrogenation: the Key Role of Hydroxyl Groups

Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

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n-Dodecane steam reforming catalyzed by Ni-Ce-Pr catalysts. Part 1: Catalyst preparation and Pr doping

Cited by 24 publications

References 53 publications

Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

Optimizing the preparation of Ni‐Ce‐Pr catalysts for efficient hydrogen production by n ‐dodecane steam reforming

Toward an Understanding of Capping Molecules on Pt Nanoparticles for Hydrogenation: the Key Role of Hydroxyl Groups

ZrxPr1–xOy Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production

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Product

Resources

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Zr_xPr_1–xO_y Solid Solution‐Supported Cobalt‐Based Catalysts for Hydrogen Production