CO2 utilization in the perspective of industrial ecology, an overview

Meylan, Frédéric David; Moreau, Vincent; Erkman, Suren

doi:10.1016/j.jcou.2015.05.003

Cited by 230 publications

(113 citation statements)

References 58 publications

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“…A very attractive strategy is the conversion of carbon dioxide into fuels, which might lead to a real circular economy, avoiding the use of net CO 2 -producing energy sources. In this way, the product of hydrocarbon combustion, i.e., water and carbon dioxide, are converted into regenerated fuels in a process that was labelled by some authors as artificial photosynthesis [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

et al. 2017

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Abstract:The use of carbon dioxide, the most concerning environmental issue of the 21st century, as a feedstock for fuels productions still represents an innovative, yet challenging, task for the scientific community. CO 2 photoreduction processes have the potential to transform this hazardous pollutant into important products for the energy industry (e.g., methane and methanol) employing a photocatalyst and light as the only energy input. In order to design an effective process, the high sustainability of this reaction should be matched with the perfect reaction conditions to allow the reactant, photocatalyst, and light source to come together: therefore, the choice of reaction conditions, and in particular its medium, is a crucial issue that needs to be investigated. Throughout this paper, a careful study of carbon dioxide photoreduction in liquid and vapour phases are reported, focusing on their effect on catalyst performances in terms of light harvesting, productivity, and selectivity. Different from most papers in the literature, catalytic tests were performed under extremely low light irradiance, in order to minimise the primary energy input, highlighting that this experimental variable has a great effect on the reaction pathway and, thus, product distribution.

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Section: Introductionmentioning

confidence: 99%

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

et al. 2017

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“…1 The potential dramatic consequences of increasing atmospheric CO 2 concentrations, i.e. overall temperature increase on the Earth's surface, have led to a general sense of awareness recently translated into different actions aiming for a more sustainable economic/industrial development.…”

Section: Introductionmentioning

confidence: 99%

Mg-promotion of Ni natural clay-supported catalysts for dry reforming of methane

et al. 2018

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Mg-promotion of natural clay based Ni-catalysts was considered, as a way of boosting the dry reforming of methane (DRM) activity of these materials. The results of the DRM experiments performed at temperatures from 600 C to 850 C evidenced much higher methane and CO 2 conversions for the Mg-promoted catalysts. Mg-promotion led of course to a significant increase of CO 2 -adsorption ability (basicity).However, the increased catalytic activity of the Mg-promoted materials was rather linked to increasedNi-dispersion and Ni 0 crystallite size. Indeed, independent of the physico-chemical properties of the support, the presence of Mg led to the formation of a MgNiO 2 mixed phase that, upon reduction, resulted in the formation of metallic Ni clusters having sizes around 7-9 nm, considerably smaller than in any of the non-promoted catalysts. Carbon formation was found to take place to a greater extent in the presence of the Mg-promoted catalysts, due to C-H bond activation leading also to favored direct methane decomposition (DMD). In spite of this, the activity of the Mg-promoted catalysts was well maintained over 5 hour DRM experiments performed at 750 C.

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“…To reducing CO 2 concentrations, two proposed methods have been developed and implemented: carbon capture and storage (CCS) and carbon capture and utilization (CCU) [7][8][9][10]. Converting CO 2 into valuable intermediate chemicals and products (such as methanol, carbonates, formic acid, methane or kerosene) is economically of interest as can potentially recoups the costs of CO 2 capture and conversion [10][11][12]. Methanol is one of the possible fuel candidates that can be made by CO 2 hydrogenation [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Development of an Efficient Methanol Production Process for Direct CO2 Hydrogenation over a Cu/ZnO/Al2O3 Catalyst

2017

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Carbon capture and utilization as a raw material for methanol production are options for addressing energy problems and global warming. However, the commercial methanol synthesis catalyst offers a poor efficiency in CO 2 feedstock because of a low conversion of CO 2 and its deactivation resulting from high water production during the process. To overcome these barriers, an efficient process consisting of three stage heat exchanger reactors was proposed for CO 2 hydrogenation. The catalyst volume in the conventional methanol reactor (CR) is divided into three sections to load reactors. The product stream of each reactor is conveyed to a flash drum to remove methanol and water from the unreacted gases (H 2 , CO and CO 2 ). Then, the gaseous stream enters the top of the next reactor as the inlet feed. This novel configuration increases CO 2 conversion almost twice compared to one stage reactor. Also to reduce water production, a water permselective membrane was assisted in each reactor to remove water from the reaction side. The proposed process was compared with one stage reactor and CR from coal and natural gas. Methanol is produced 288, 305, 586 and 569 ton/day in CR, one-stage, three-stage and three-stage membrane reactors (MR), respectively. Although methanol production rate in three-stage MR is a bit lower than three stage reactors, the produced water, as the cause of catalyst poisoning, is notably reduced in this configuration. Results show that the proposed process is a strongly feasible way to produce methanol that can competitive with a traditional synthesis process.

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CO2 utilization in the perspective of industrial ecology, an overview

Cited by 230 publications

References 58 publications

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

Liquid vs. Gas Phase CO2 Photoreduction Process: Which Is the Effect of the Reaction Medium?

Mg-promotion of Ni natural clay-supported catalysts for dry reforming of methane

Development of an Efficient Methanol Production Process for Direct CO2 Hydrogenation over a Cu/ZnO/Al2O3 Catalyst

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