Michalis Konsolakis

Michalis Konsolakis
Technical University of Crete | TUC · School of Production Engineering and Management/Industrial Energy & Environmental Systems Lab (IEESL)

Professor

About

116
Publications
27,124
Reads
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3,184
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Introduction
Dr. Konsolakis Michalis is Full Professor of “Heterogenous Catalysis & Surface Science" at the School of Production Engineering & Management, Tech. University of Crete,Greece. His research activities lie mainly in the areas of heterogeneous catalysis and surface science with particular emphasis on structure-property relationships. His published work includes >200 papers in international journals (~90) and conference proceeding (~120) as well as 1 book in the area of chemistry.
Additional affiliations
September 2016 - present
Technical University of Crete
Position
  • Professor (Associate)
June 2013 - August 2016
Technical University of Crete
Position
  • Assistant Professor (tenure)
December 2009 - June 2013
Technical University of Crete
Position
  • Professor (Assistant)
Education
September 1997 - September 2001
University of Patras
Field of study
  • Chemical Engineering
September 1992 - September 1997
University of Patras
Field of study
  • Chemical Engineering

Publications

Publications (116)
Article
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The production of either CO or CH4 via the hydrogenation of CO2 is amongst the most promising routes for CO2 utilization. However, kinetic barriers necessitate the use of a catalyst, with Ni/CeO2 being one of the most investigated systems. Nevertheless, surface chemistry fine-tuning via appropriate promotional routes can induce significant modifica...
Article
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The increasing trend in global energy demand has led to an extensive use of fossil fuels and subsequently in a marked increase in atmospheric CO2 content, which is the main culprit for the greenhouse effect. In order to successfully reverse this trend, many schemes for CO2 mitigation have been proposed, taking into consideration that large-scale de...
Article
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The presented work explores the structural properties, gasification reactivity, and syngas production of Greek lignite fuel (LG) and ex-situ produced chars during CO2 gasification. Three different slow pyrolysis protocols were employed for char production involving torrefaction at 300 °C (LG300), mild-carbonization at 500 °C (LG500), and carbonizat...
Article
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The present work introduces a feasible, carbon-free integrated process that is based on the catalytic hydrogenation of industrially captured CO2 via green H2 towards the production of synthetic natural gas (SNG). Overall, three systems are being assessed from an economic point of view (sizing and simulation through Aspen Plus and HOMER software): a...
Article
Full-text available
Catalysis is an indispensable part of our society, involved in numerous energy and environmental applications, such as the production of value-added chemicals/fuels, hydrocarbons processing, fuel cells applications, abatement of hazardous pollutants, among others. Although, noble metals (NMs)-based catalysts are traditionally employed in various pr...
Article
Low-rank lignite is among the most abundant and cheap fossil fuels, linked, however, to serious environmental implications when employed as feedstock in conventional thermoelectric power plants. Hence, toward a low-carbon energy transition, the role of coal in world's energy mix should be reconsidered. In this regard, coal gasification for synthesi...
Article
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The present work assesses the feasibility of a circular approach towards a carbon-neutral process that leads to the production of 500 ktn/yr of synthetic natural gas (SNG). Overall, three main systems were sized, simulated and heat/energy coupled under a realistic scenario that ensures an autonomous and economically feasible operation: a) cement-ba...
Article
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The copper–ceria (CuOx/CeO2) system has been extensively investigated in several catalytic processes, given its distinctive properties and considerable low cost compared to noble metal-based catalysts. The fine-tuning of key parameters, e.g., the particle size and shape of individual counterparts, can significantly affect the physicochemical proper...
Article
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The structure sensitivity of CO2 methanation was explored over nickel particles (10–25 nm) supported on CeO2 nanorods. An optimum Ni particle size of 20 nm was revealed, with the corresponding sample demonstrating remarkable activity, i.e., 187 μmol CH4 g⁻¹ s⁻¹ and 92 % CH4 yield at 275 °C, which is among the highest ever reported. Notably, the int...
Article
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The rational design and fabrication of highly-active and cost-efficient catalytic materials constitutes the main research pillar in catalysis field. In this context, the fine-tuning of size and shape at the nanometer scale can exert an intense impact not only on the inherent reactivity of catalyst’s counterparts but also on their interfacial intera...
Article
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The present themed issue is focused on the recent advances in relation to the synthesis and the surface/interface functionalization of catalysts composites. Advanced synthetic and/or modification routes were employed for the development of highly-active and stable nanocomposites for various energy and environmental applications.
Article
The reaction of captured carbon dioxide with renewable hydrogen towards the eventual indirect production of liquid hydrocarbons via CO2 reduction to CO (reverse water-gas shift reaction, rWGS) is a promising pathway in the general scheme of worldwide CO2 valorization. Copper-ceria oxides have been largely employed as rWGS catalysts owing to their u...
Article
Herein, novel Cu2O-CuO/HTC composites were prepared by hydrothermal precipitation employing as carrier sawdust hydrochar carbonized at 200 C for 2, 6, and 12 h. The composites were used for the effective sonocatalytic degradation of three dyes (Acid Blue 92 (AB 92), Acid Red 14 (AR 14) and Acid Orange 7 (AO 7)) with different molecular structure. T...
Article
The thermochemical conversion of biomass through its gasification has been widely explored during the last decades. The generated bio-syngas mixture can be directly used as fuel in thermal engines and fuel cells or as intermediate building block to produce synthetic liquid fuels and/or value added chemicals at large scales. In the present work, the...
Article
Herein, novel Cu2O–CuO/HTC composites were prepared by hydrothermal precipitation employing as carrier sawdust hydrochar carbonized at 200 °C for 2, 6, and 12 h. The composites were used for the effective sonocatalytic degradation of three dyes (Acid Blue 92 (AB 92), Acid Red 14 (AR 14) and Acid Orange 7 (AO 7)) with different molecular structure....
Preprint
Full-text available
In view of the unprecedented energy and environmental issues currently faced, heterogeneous catalysis is expected to have a key role in the near future toward a sustainable development. The rational design and development of highly efficient and cost-effective (electro)catalysts are of paramount importance. The present themed Special Issue is mainl...
Article
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The rational design of highly efficient, noble metal–free metal oxides is one of the main research priorities in the area of catalysis. To this end, the fine tuning of ceria–based mixed oxides by means of aliovalent metal doping has currently received particular attention due to the peculiar metal–ceria synergistic interactions. Herein, we report o...
Article
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https://www.mdpi.com/2227-9717/8/7/847 Ceria-based mixed oxides have been widely studied in catalysis due to their unique surface and redox properties, with implications in numerous energy- and environmental-related applications. In this regard, the rational design of ceria-based composites by means of advanced synthetic routes has gained particula...
Article
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The present work explores the economic feasibility of methanol production from the fluent gases of a MSW mass combustion plant for electricity generation. The overall methodology involves the comparison of the economic performance of the MSW-to-methanol integrated plant with that of the initial MSW-to-electricity installation, which was studied els...
Article
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Nickel particles deposited on hydrothermally synthesized ceria nanorods (CeO2-NR) were found to be highly active and stable for CO2 methanation. A CO2-to-CH4 yield of 92% was achieved at 300 °C. The superior performance of Ni/CeO2-NR was demonstrated through a comparison with i) CeO2 and Ni/CeO2 commercial products, ii) various M/CeO2-NR lab-synthe...
Article
Full-text available
Catalysis is an indispensable part of our society, massively involved in numerous energy and environmental applications. Although, noble metals (NMs)-based catalysts are routinely employed in catalysis, their limited resources and high cost hinder the widespread practical application. In this regard, the development of NMs-free metal oxides (MOs) w...
Article
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In this work we report on the combined impact of active phase nature (M: Co or Cu) and ceria nanoparticles support morphology (nanorods (NR) or nanocubes (NC)) on the physicochemical characteristics and CO 2 hydrogenation performance of M/CeO 2 composites at atmospheric pressure. It was found that CO 2 conversion followed the order: Co/CeO 2 > Cu/C...
Article
This research focuses on the facile hydrothermal preparation of Cu2O-CuO@biochar (Cu2O-CuO@BC) composites of different BC content (0.5, 1.0, and 2.0 g/L) as efficient photocatalysts for the decomposition and mineraliza-tion of Reactive Orange 29 (RO29). The textural and morphological properties of biochar-based composites were studied utilizing BET...
Article
Full-text available
Ceria has been widely studied either as catalyst itself or support of various active phases in many catalytic reactions, due to its unique redox and surface properties in conjunction to its lower cost, compared to noble metal-based catalytic systems. The rational design of catalytic materials, through appropriate tailoring of the particles’ shape a...
Article
Hydrogen sulphide (H2S) is one of the most poisonous and corrosive chemical substances existing in several natural and industrial gas streams, further considered as a valuable H2 source. Hence, H2S decomposition to H2 is of paramount importance toward a sustainable energy future. In the present work, the catalytic decomposition of H2S is explored i...
Article
Full-text available
Ceria-based oxides have been widely explored recently in the direct decomposition of N2O (deN2O) due to their unique redox/surface properties and lower cost as compared to noble metal-based catalysts. Cobalt oxide dispersed on ceria is among the most active mixed oxides with its efficiency strongly affected by counterpart features, such as particle...
Article
The current work explores the feasibility to improve the performance of a Direct Carbon Fuel Cell (DCFC): CO 2 + bituminous coal|Co-CeO 2 /YSZ/Ag|Air by infusing a gasification catalyst (Co/CeO 2 ) and/or Li-K carbonates mixture into the carbon fuel. The different fuel feedstock mixtures were characterized by various methods, involving chemical com...
Article
The fine-tuning of local surface chemistry of CuO-CeO2 mixed oxides by means of synthesis procedure and alkali promotion towards the rational design of highly active catalysts is investigated. In particular, the impact of alkali (Cs) promotion on the N2O decomposition activity (deN2O process) of CuO-Ceria mixed oxides, pre-optimized through the pre...
Article
The present work explores the feasibility of an integrated and autonomous scaled up process towards the remediation of the Black Sea ecosystem with simultaneous H2 generation through the co-electrolysis of rich H2S/H2O seawater mixtures. The core unit of the proposed process is a proton-conducting membrane cell stack reactor (electrolyzer), where H...
Article
Full-text available
Copper-ceria binary oxides have been extensively used in a wide variety of catalytic processes due to their unique catalytic features in conjunction to their lower cost as compared to noble metal-based systems. However, various parameters related to different counterparts characteristics, such as particle size and morphology, can exert a profound i...
Article
Full-text available
The combined impact of carbon type (anthracite coal, bituminous coal and pine charcoal) and in situ, catalyst-aided, carbon gasification process on the electrochemical performance of a Direct Carbon Fuel Cell (DCFC) is explored. The effect of operation temperature (700–800 °C) and catalyst (Co/CeO2) infusion to carbon feedstock under CO2 atmosphere...
Article
CO 2 hydrogenation to value added chemicals/fuels has gained considerable interest, in terms of sustainable energy and environmental mitigation. In this regard, the present work aims to investigate the CO 2 methanation performance of cobalt-based catalysts supported on different metal oxides (M x O y : CeO 2 , ZrO 2 , Gd 2 O 3 , ZnO) at low tempera...
Article
The sonocatalytic performance of CeO2 nanoparticles synthesized by a hydrothermal method (CeO2-H) and CeO2@biochar (CeO2[email protected]) nanocomposite, were evaluated for the degradation of Reactive Red 84 (RR84) under ultrasonic irradiation. For comparison purposes the corresponding performance of bare biochar (BC) and commercial CeO2 (CeO2-C) s...
Article
The present work aims to explore the impact of the support (MxOy: Al2O3, TiO2, Fe2O3, CeO2, ZnO) on the CO2 hydrogenation activity of supported gold nanoparticles (Au/MxOy) at atmospheric pressure. The textural, redox and surface properties of Au/MxOy catalysts were evaluated by various characterisation methods, namely N2 adsorption-desorption at −...
Article
The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/ H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the solid electrolyte. The impact of temperature (700–850 °C) and H2S concentration (0–1 v/v%) in steam-rich atmospheres (90 v/v% H2...
Article
Short communication, Catalysis Communications, https://doi.org/10.1016/j.catcom.2017.05.003 Abstract Au nanoparticles (2.2 nm) deposited on TiO2 by the deposition-precipitation method were found to be extremely active and stable for CO2 hydrogenation to CO. A CO2 to CO yield up to 50% was achieved at temperatures as low as 400 °C for at least 60 h...
Article
The aim of this work is to explore the influence of the support (MxOy: Al2O3, CeO2, Fe2O3, TiO2 and ZnO) on the physicochemical characteristics and the N2O decomposition (deN2O) performance of supported gold nanoparticles (Au/MxOy). Both the bare oxides and the Au/oxide catalysts were characterized by several methods (BET, XRD, SEM, HR-TEM, XPS and...
Article
Cobalt-cerium mixed oxides were prepared by the wet impregnation method and evaluated for volatile organic compounds (VOCs) abatement, using ethyl acetate (EtAc) as model molecule. The impact of Co content on the physicochemical characteristics of catalysts and EtAc conversion was investigated. The materials were characterized by various techniques...
Article
Full-text available
Ceria-based materials have received considerable attention in catalysis field due to their unique physicochemical characteristics. Compared to bulk ceria, nanosized ceria received particular interest, due to its high surface to volume ratio, improved reducibility and optimal morphological features. Hence, the fine-tuning of ceria properties by mean...
Article
The aim of this work is to explore the influence of the support () on the physicochemical characteristics and the N 2 O decomposition (deN 2 O) performance of supported gold nanoparticles (Au/M x O y). Both the bare oxides and the Au/oxide catalysts were characterized by several methods (BET, XRD, SEM, HR-TEM, XPS and H 2-TPR) and comparatively eva...
Article
The electrochemical performance of Co3O4/CeO2 mixed oxide materials as electrodes, when exposed to H2S/H2O atmospheres, was examined employing a proton conducting symmetrical cell, with BaZr0.7Ce0.2Y0.1O3 (BZCY72) as the solid electrolyte. The impact of temperature (700 – 850 oC) and H2S concentration (0 – 1 v/v%) in steam-rich atmospheres (90 v/v%...
Article
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Nowadays, heterogeneous catalysis plays a prominent role.[...]
Article
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The promoting impact of potassium (0–1 wt% K) on nitrous oxide (N2O) catalytic decomposition over Ir/Al2O3 is investigated under both oxygen deficient and oxygen excess conditions. All samples were characterized by means of X-ray powder diffraction (XRD), temperature-programmed reduction (H2-TPR), ammonia desorption (NH3-TPD) and Fourier Transform...
Article
Copper–containing cerium oxide materials have received considerable attention both in catalysis and electro–catalysis fields due to their unique physicochemical characteristics in conjunction to their lower cost compared to noble metals (NMs)–based catalysts. Nowadays, it is well documented that the complex Copper–Ceria interactions (either geometr...
Article
Full-text available
Different lanthanide (Ln)-doped cerium oxides (Ce0.5Ln0.5O1.75, where Ln: Gd, La, Pr, Nd, Sm) were loaded with Cu (20 wt . %) and used as catalysts for the oxidation of ethyl acetate (EtOAc), a common volatile organic compound (VOC). For comparison, both Cu-free (Ce-Ln) and supported Cu (Cu/Ce-Ln) samples were characterized by N2 adsorption at −196...
Article
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The aim of the present work was to investigate steam reforming of ethanol with regard to H2 production over transition metal catalysts supported on CeO2. Various parameters concerning the effect of temperature (400–800 °C), steam-to-carbon (S/C) feed ratio (0.5, 1.5, 3, 6), metal entity (Fe, Co, Ni, Cu) and metal loading (15–30 wt.%) on the catalyt...
Article
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The present study aims to examine and evaluate the concept of H2S decomposition to H2 production in (H2)-conducting electrochemical reactors. In such a complex process, one of the major issues raised is the optimal selection of materials for the electrochemical cell. Specifically, the anode electrode should exhibit high catalytic activity and elect...
Research
Full-text available
The impact of fuel heat pretreatment on the performance of a direct carbon fuel cell (DCFC) is investigated by utilizing lignite (LG) coal as feedstock in a solid oxide fuel cell of the type: lignite|Co–CeO2/YSZ/Ag|air. Four LG samples are employed as feedstock: (i) pristine lignite (LG), and differently heat treated LG samples under inert (He) atm...
Chapter
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Three-way catalytic converters (TWCs) have been successfully applied over the last decades for the simultaneous abatement of automotive exhaust emissions. In this chapter, a brief overview of the TWC technology and the progress toward the development of effective catalytic materials capable of meeting the continuously stricter legislations and/or n...
Article
Nitrous oxide (N2O) is the largest stratospheric ozone depleting substance, being concomitantly the third most potent greenhouse gas. The direct catalytic decomposition of N2O (deN2O process) is one of the most promising remediation technologies for N2O emissions abatement. Although noble metals (NMs)–based catalysts demonstrate satisfactory deN2O...
Article
Full-text available
The feasibility of employing biochar as a fuel in a direct carbon fuel cell (DCFC) or a hybrid carbon fuel cell (HCFC) is investigated in the present study, by utilizing bare biochar or biochar/carbonate mixture as feedstock, respectively. Three different types of biochars, i.e., pistachio shells (PI), pecan shells (PE) and sawdust (SD) are used as...
Article
Ceria-based transition metal catalysts have recently received considerable attention both in heterogeneous catalysis and electro-catalysis fields, due to their unique physicochemical characteristics. Their catalytic performance is greatly affected by the surface local chemistry and oxygen vacancies. The present study aims at investigating the impac...
Article
The feasibility of hydrogen production by the decomposition of H2S in an electrocatalytic membrane reactor for the exploitation of H2S contained in Black Sea water is investigated. A micro-structured electrochemical membrane reactor with a proton-conducting ceramic membrane is considered for processing gaseous H2S diluted (1 vol.%) in H2O mixtures....
Article
Full-text available
The present work aims at investigating the catalytic decomposition of N2O over CuO-CeO2 single or mixed oxides prepared by different synthesis routes, i.e., impregnation, precipitation and exotemplating. To gain insight into the particular role of CeO2 as well as of CuO-CeO2 interactions, three different types of materials are prepared and tested f...
Article
This study explores strategies to develop highly efficient direct carbon fuel cells (DCFCs) by combining a solid-oxide fuel cell (SOFC) with a catalyst-aided carbon-gasification process. This system employs Cu/CeO2 composites as both anodic electrodes and carbon additives in a cell of the type: carbon|Cu-CeO2/YSZ/Ag|air. The study investigates the...
Article
Ce–Co and La–Co mixed oxides were synthesized by two different methods: exotemplating and evaporation. The obtained catalysts were evaluated for volatile organic compounds (VOCs) abatement, using toluene as model molecule. The materials were characterized by N2 adsorption at −196 °C, X-ray diffraction (XRD), scanning electron microscopy (SEM), H2 t...
Article
The feasibility of employing lignite coal as a fuel in a Direct Carbon Fuel Cell (DCFC) of the type: lignite/Co-CeO2/YSZ/Ag/air is investigated. The impact of several parameters, related to anodic electrode composition (20, 40 and 60 wt.% Co/CeO2), cell temperature (700-800 oC), carrier gas composition (CO2/He mixtures), and total feed flow rate (1...
Article
Full-text available
The present work aims at investigating the catalytic decomposition of N2O over CuO–CeO2 single or mixed oxides prepared by different synthesis routes, i.e., impregnation, precipitation and exotemplating. To gain insight into the particular role of CeO2 as well as of CuO–CeO2 interactions, three different types of materials were prepared and tested...
Article
Τhe feasibility of tailoring the iso-octane steam reforming activity of Cu/CeO2 catalysts through the use of Co as a second active metal (Cu20−xCox, where x = 0, 5, 10, 15, 20 wt%), is investigated. Characterization studies, involving N2 adsorption–desorption at −196 °C (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photo...
Article
Τhe feasibility of tailoring the iso-octane steam reforming activity of Cu/CeO2 catalysts through the use of Co as a second active metal (Cu20-xCox, where x = 0, 5, 10, 15, 20 wt%), is investigated. Characterization studies, involving N2 adsorption-desorption at -196°C (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoe...
Conference Paper
The deN 2 O performance of low content (0.25, 0.5 and 1.0 wt. %), Al 2 O 3 supported noble metals (Pt, Pd, Ir) is comparatively explored in the present study. Several parameters related to the effect of temperature, metal content and feed composition are investigated. An extensive characterization study involving BET, TPR, XRD and TEM was also carr...
Conference Paper
Full-text available
The potential of direct utilization of lignite coal in a Direct Carbon Fuel Cell (DCFC) of the type: lignite|Co-CeO 2 /YSZ/Ag|air is investigated in the present study. The impact of several parameters, related to anodic electrode composition (20, 40 and 60 wt.% Co/CeO 2), operation temperature (700-800 °C), carrier gas composition (CO 2 /He mixture...
Article
Ce–Co and La–Co mixed oxides were synthesized by two different methods: exotemplating and evaporation. The obtained catalysts were evaluated for volatile organic compounds (VOCs) abatement, using toluene as model molecule. The materials were characterized by N2 adsorption at −196 ◦C, X-ray diffraction (XRD), scanning electron microscopy (SEM), H2 t...
Article
Full-text available
The impact of carbon type on the performance of the direct carbon fuel cell (DCFC) or hybrid carbon fuel cell (HCFC) is investigated by utilizing bare carbon or carbon/carbonate mixtures as feedstock, respectively. In this regard, four different types of carbons, i.e. bituminous coal (BC), demineralised bituminous coal (DBC), anthracite coal (AC) a...
Article
The present work aims to investigate the steam reforming (SR) of liquid hydrocarbons toward hydrogen production, employing iso-octane as gasoline surrogate, over Cu catalysts supported on rare earth oxides (REOs). An extensive characterization study, involving X ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectros...
Article
Full-text available
The impact of carbon type on the performance of the direct carbon fuel cell (DCFC) or hybrid carbon fuel cell (HCFC) is investigated by utilizing bare carbon or carbon/carbonate mixtures as feedstock, respectively. In this regard, four different types of carbons, i.e. bituminous coal (BC), demineralised bituminous coal (DBC), anthracite coal (AC) a...