Development of Ni catalysts with low metal content and improved stability in the dry reforming of methane to syngas

Quan Luu Manh Ha

doi:10.18453/rosdok_id00002741

Quan Luu Manh Ha

Development of Ni catalysts with low metal content and improved stability in the dry reforming of methane to syngas

Universität Rostock, 2019

https://doi.org/10.18453/rosdok_id00002741

Abstract: Catalysts with 2.5 wt% Ni supported on MgO-Al2O3 were developed for CH4 dry reform-ing (DRM) that are stable at either mild (stoichiometric) or severe (CH4-rich) conditions. Solid materials were characterized with suitable methods. Catalysts with NiO-MgO-Al2O3 solid solution were active even at 500 °C. In stoichiometric DRM, Ni catalyst modified with La and citric acid reduced both Ni re-oxidation and agglomeration, preserving high activity over 160 h. Besides, proper support pre-treatment or adding Gd3+ both offered outstandingly coking-resistant Ni-based catalysts for CH4-rich DRM over 100 h.

doctoral thesis free access

title:

Development of Ni catalysts with low metal content and improved stability in the dry reforming of methane to syngas

contributing persons:

Quan Luu Manh Ha[VerfasserIn]
	0000-0003-3717-1033
	1191941779
Udo Kragl[AkademischeR BetreuerIn]
	0000-0002-2507-7472
	131893351
Martin Muhler[AkademischeR BetreuerIn]
	0000-0001-5343-6922
	143495577

contributing corporate bodies:

Universität Rostock[Grad-verleihende Institution]
	38329-6
Universität Rostock, Mathematisch-Naturwissenschaftliche Fakultät[Grad-verleihende Institution]
	2147083-2

abstract:

Catalysts with 2.5 wt% Ni supported on MgO-Al2O3 were developed for CH4 dry reform-ing (DRM) that are stable at either mild (stoichiometric) or severe (CH4-rich) conditions. Solid materials were characterized with suitable methods. Catalysts with NiO-MgO-Al2O3 solid solution were active even at 500 °C. In stoichiometric DRM, Ni catalyst modified with La and citric acid reduced both Ni re-oxidation and agglomeration, preserving high activity over 160 h. Besides, proper support pre-treatment or adding Gd3+ both offered outstandingly coking-resistant Ni-based catalysts for CH4-rich DRM over 100 h. [English]

Für das trockene Reformieren (DRM) wurden Katalysatoren mit niedrigem Ni-Gehalt (2,5 Gew.-%) auf Mg-Al-Mischoxid entwickelt, die stabil bei stöchiometrischen oder CH4-reichen Bedingungen waren. Die Materialien wurden charakterisiert. Katalysatoren mit festen NiO-MgO-Al2O3-Lösungen waren schon bei 500 °C aktiv. Im stöchiometrischen DRM verringerte die Modifikation mit La/Zitronensäure die Reoxidation/Agglomeration von Ni und die Katalysatorstandzeit erreichte 160 h. Geeignete Trägervorbehandlung oder Gd3+-Dotierung führte zu stabilen und aktiven Ni-Katalysatoren für das CH4-reiche DRM über 100 h. [German]

document type:

doctoral thesis

institution:

Faculty of Mathematics and Natural Sciences

language:

English

subject class (DDC):

540 Chemistry & allied sciences

publication /
production:

Rostock

Rostock: Universität Rostock

2019

statement of responsibility:

vorgelegt von Quan Luu Manh Ha

notes:

GutacherInnen: Udo Kragl (Universität Rostock, Institut für Chemie, Abteilung Technische und Analytische Chemie) ; Martin Muhler (Ruhr-Universität Bochum, Lehrstuhl für Technische Chemie)

identifiers: