BrainMap

Mr. Ioan-Cezar Marcu

Dr. Habil.

Professor - UNIVERSITATEA BUCURESTI

Researcher | Teaching staff | Scientific reviewer | Manager | PhD supervisor

BSc in Chemistry & Physics in 1995 and MSc in Catalysis in 1996 at the University of Bucharest (UB), Romania. PhD in Catalysis in 2002 at the Institute of Catalysis – University Lyon 1, France. CNRS post-doctoral researcher at the Institute Charles Gerhardt Montpellier, France, from October 2006 to September 2007. Senior Researcher at the Research Center for Catalysts and Catalytic Processes of UB from 2007. Habilitation in Catalysis in 2013 at UB. FULL PROFESSOR at UB from 2020, in charge of Chemical Technology and Catalytic Materials disciplines. Research interests cover the field of CATALYSIS BY METAL OXIDES. Published more than 80 research papers, including three book chapters and four encyclopedia articles.

Web of Science ResearcherID: 1320869/ioan-cezar-marcu/

Curriculum Vitae (03/06/2024)

Expertise & keywords

New LDH-derived trimetallic mixed oxides, catalysts for light alkanes combustion Call name: Postdoctoral Research Projects - PD-2011 call
PN-II-RU-PD-2011-3-0160 2011 - 2013

Role in this project: Key expert

Coordinating institution: Universitatea din Bucuresti

Project partners: Universitatea din Bucuresti (RO)

Affiliation: Universitatea din Bucuresti (RO)

Project website: http://www.unibuc.ro/prof/marcu_i_c/New_LDH-derived_trimetallic_mixed_oxides_catalysts_for_light_alkanes_combustion.php_old.php

Abstract:

Alkanes are amongst the most prevalent environmental volatile organic compounds (VOCs) emissions, one of the most effective and economically attractive methods of their neutralization being their catalytic combustion. Nowadays, seventy-five percent of the catalysts used for VOCs destruction are precious metal catalysts, generally supposed to be more active than metal oxides. Nevertheless they have some disadvantages like high sintering rates, volatility, poisoning in presence of water or sulfur compounds and high price. Metal oxides have not these disadvantages and can furthermore be more easily prepared, which makes them promising substitution catalysts. Amongst the oxide-based systems, the LDH-derived mixed oxides seem to be effective catalysts for the total oxidation of VOCs. Therefore, we propose to synthesize by LDH controlled thermal decomposition some trimetallic new CuZnAl and CuZnMn mixed oxides, with different copper or manganese contents. They will be characterized by X-ray diffraction, textural analysis, EDX microprobe and H2-TPR experiments and their catalytic behavior will be evaluated in the combustion of methane as model compound of VOC.

New M-Mg-Al-O mesostructured oxide-based catalysts from hydrotalcite precursors for catalytic combustion and oxidative dehydrogenation of light alkanes Call name:
IDEI 1906 2009 - 2011

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI ()

Affiliation: UNIVERSITATEA BUCURESTI ()

Project website:

Abstract:

Alkanes are amongst the most prevalent environmental volatile organic compounds (VOC) emissions, one of the most effective and economically attractive methods of their neutralization being the catalytic combustion. Moreover, because of their high chemical inertness, light alkanes are good model compounds to test the efficiency of catalysts for most VOC combustion. On the other hand, performing the oxidative dehydrogenation of light alkanes with yields which could lead to the industrial applications is, actually, a challenge problem for the heterogeneous catalysis, the catalyst playing a key role; it must accelerate only the one chosen sequence (oxidative dehydrogenation) of consecutive elementary steps and suppress all other possible elementary steps, parallel or consecutive. Mesostructured mixed oxide-based catalysts obtained by a controlled decomposition of the hydrotalcite-like compounds show a large surface area, small crystallite size and stability against sintering that are usually required for combustion catalysts. At the same time, these systems show high metal dispersion, suggesting the fulfillment of the catalytic oxydehydrogenation using the concept of site isolation, and high basicity, essential for the oxydehydrogenation catalysts to promote alkenes desorption, the final result being an increase of the selectivity. Some results, only few actually, show that mesostructured oxides obtained by the decomposition of hidrotalcite-like precursors are more efficient than the same systems obtained by other methods for both catalytic combustion and oxidative dehydrogenation of light alkanes. For these reasons we propose to synthesize, to characterize and to test in both light alkane oxidation reactions, of some M-Mg-Al-O mesostructured oxide-based systems, the chemical nature of the cation M being also important for one or another oxidation direction.

Oxydehydrogenation of C4 alkanes over phosphate and phosphated oxide type catalysts in presence of carbon dioxide Call name:
1064 A 2006 - 2008

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI ()

Affiliation: UNIVERSITATEA BUCURESTI ()

Project website:

Abstract:

Actually, the realization of the oxidative dehydrogenation of light alkanes with yields which could lead to the industrial applications, is a challenge problem for the heterogeneous catalysis, the catalyst playing a key role; it must accelerate only the one chosen sequence (oxidative dehydrogenation) of consecutive elementary steps and suppress all other possible elementary steps, parallel or consecutive. The catalytic performance of phosphate-based catalysts could be substantially improved by modifying the surface phosphorus content and/or by carrying out the catalytic reaction in the presence of carbon dioxide as a mild oxidant. On the other hand, the phosphatation of simple and mixed oxide-based catalysts could have as an effect a substantial increase of the selectivity for oxydehydrogenation. This could be explained by a reduction of the mobility of the lattice oxygen as a result of the formation of some superficial M-O-P bridges and/or by blocking the non-selective sites on the catalyst surface with phosphate or pyrophosphate groups. Moreover, the performance of phosphated catalysts could also be improved by realizing the reaction in the presence of carbon dioxide. In this manner, very active and, particularly, selective catalysts could be obtained which may have as a final result the application of the process at industrial scale.

Oxidative dehydrogenation of light alkanes over phosphate-type catalysts Call name:
129 At 2004 - 2005

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI ()

Affiliation: UNIVERSITATEA BUCURESTI ()

Project website:

Abstract:

Actually, the realization of the oxidative dehydrogenation of light alkanes with yields which could lead to the industrial applications, is a challenge problem for the heterogeneous catalysis, the catalyst playing a key role; it must accelerate only the one chosen sequence (oxidative dehydrogenation) of consecutive elementary steps and suppress all ather possible elementary steps, parallel or consecutive. TiP2O7 is an active and selective catalyst for the oxidative dehydrogenation of n-butane to butenes and butadiene (25% conversion and 56% selectivity at 530°C), the active sites being titanium cations. For improving his catalytic properties, we propose the study of a series of Ti-P-O based catalysts prepared by thermal reaction of TiO2 with H3PO4, the P:Ti atomic ratio being varied between 0 (TiO2) and 2 (TiP2O7). After calcination in the same conditions and characterization using techniques like DRX, BET, XPS, MEB etc., the catalytic properties of these solids will be evaluated in the oxidative dehydrogenation of n-butane and other light alkanes. For studying the evolution of the physico-chemical properties during catalysis, the catalysts will also be characterized after the catalytic test. The influence of some factors on the catalytic properties of the catalysts, like the reaction temperature, the contact time, the alkane/air molar ratio and the presence of water vapors in the feed, will also be studied.

Sustainable Industrial Processing Summit & Exhibition (SIPS 2018) Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori
PN-III-P1-1.1-MC-2018-0912 2018 -

Role in this project:

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI (RO)

Affiliation: UNIVERSITATEA BUCURESTI (RO)

Project website:

Abstract:

2nd International Conference on Catalysis and Chemical Engineering Call name: P 1 - SP 1.1 - Proiecte de mobilitate pentru cercetatori
PN-III-P1-1.1-MC-2017-1469 2017 -

Role in this project:

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI (RO)

Affiliation: UNIVERSITATEA BUCURESTI (RO)

Project website:

Abstract:

Call name: Burse Tineri 2014
PN-II-RU-BT-2014-2-0007 2014 -

Role in this project: Project coordinator

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI (RO)

Affiliation: UNIVERSITATEA BUCURESTI (RO)

Project website:

Abstract:

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects	Download (105.29 kb) 03/06/2020