An investigative study on replacing the conventional furnaces of naphtha reforming with chemical looping combustion for clean hydrogen production

Ebrahimian, Samira; Iranshahi, Davood

doi:10.1016/j.ijhydene.2019.10.092

Cited by 16 publications

(6 citation statements)

References 70 publications

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“…H 2 serves as a clean energy carrier and can be stored for later reconversion into electricity, as well as being used as a fuel or for carbon capture/recycling [ 5 , 6 , 7 ]. H 2 production is frequently driven by renewable and non-renewable energy resources, such as fossil fuels— in particular steam methane reforming [ 8 , 9 ] and the NAFTA reform [ 10 , 11 ]—from biomass [ 12 ], and from biological sources [ 13 , 14 , 15 , 16 ]. Unfortunately, these H 2 production methods are expensive, partially efficient, and environmentally polluting, as well as also producing low-purity H 2 [ 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

et al. 2022

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In this study, for the first time, the production of green hydrogen gas (H2) in the cathodic compartment, in concomitance with the electrochemical oxidation (EO) of an aqueous solution containing Calcon dye at the anodic compartment, was studied in a PEM-type electrochemical cell driven by a photovoltaic (PV) energy source. EO of Calcon was carried out on a Nb/BDD anode at different current densities (7.5, 15 and 30 mA cm−2), while a stainless steel (SS) cathode was used for green H2 production. The results of the analysis by UV-vis spectroscopy and total organic carbon (TOC) clearly showed that the electrochemical oxidation (EO) of the Calcon dye after 180 min of electrolysis time by applying 30 mA cm−2 reached up to 90% of degradation and 57% of TOC removal. Meanwhile, under these experimental conditions, a green H2 production greater than 0.9 L was achieved, with a Faradaic efficiency of 98%. The hybrid electrolysis strategy is particularly attractive in the context of a circular economy, as these can be coupled with the use of more complex water matrices to transform organic depollution into an energy resource to produce H2 as a chemical energy carrier.

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Section: Introductionmentioning

confidence: 99%

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

et al. 2022

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“…In this novel technology, traditional direct contact of the fuel and air is prevented, prohibiting the dilution of combustion-derived CO 2 in the N 2 stream. Subsequently, it does not include energy consumption for CO 2 separation compared to the other schemes which nitrogen and carbon dioxide are mixed. , Regarding capturing CO 2 with the CLC systems, Ishida et al were the first researchers to emphasize this distinguished feature of chemical looping combustion …”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, it does not include energy consumption for CO 2 separation compared to the other schemes which nitrogen and carbon dioxide are mixed. 20,21 Regarding capturing CO 2 with the CLC systems, Ishida et al were the first researchers to emphasize this distinguished feature of chemical looping combustion. 22 1.3.…”

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confidence: 99%

Inherent CO₂ Capture and H₂ Production Enhancement in a New Glycerol Steam Reformer Coupled with Chemical Looping Combustion

Khazayialiabad

Iranshahi

2021

Energy Fuels

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As far as biodiesel economy and hydrogen production are concerned, steam reforming of glycerol, which is the main byproduct of the biodiesel plants, is an appealing policy. Despite hydrogen abundant application in various fields, the total energy efficiency of its production process is comparatively unpleasant. Thus, an upgrading of the outdated procedure is the vital key for consideration of hydrogen as the future fuel. In the current study, a new reactor configuration that integrates both chemical looping combustion (CLC) system and glycerol steam reforming (GSR) process is introduced and compared with the conventional concept; therefore, the electric furnace, the energy-supplier of the conventional reactor, is removed. One of the most substantial aspects that should be noted in the CLC technologies is the operation of oxygen carriers. The applied oxygen carrier in the present CLC system is the NiO18-αAl 2 O 3 particles. This type of oxygen carrier has revealed great reactivity and the ability to operate suitably in high temperatures. The proposed model displays that the conversion of glycerol and yield of hydrogen are elevated by 32.88% and 1.95, compared with those of its conventional system, respectively. In conclusion, the performance of the proposed configuration was analyzed by changing the inlet temperature of both CLC and GSR processes, as well as inlet pressure and flow rate of the steam reforming process.

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“…During this period, a large number of [25] complex, highly precise, and detailed mathematical models of the catalytic reforming process, simulating different naphthas with various amount of detail, have been developed. The following steps were highlighted in the study of research and work: the effect of changes in feedstock composition at the naphtha catalytic reforming unit is considered [26]; consider the parameters of the working process of coke combustion, comparing the results with industrial data [27]; conduct a comprehensive sensitivity analysis of the quality and quantity of the product [28] without taking into account the impact of changes in the composition of raw materials of the process; the influence of the design parameters of a catalytic reforming reactor, the molar flow rate on the hydrodealkylation side, the molar ratio of hydrogen to hydrocarbons, the impact of catalyst deactivation on the system performance are subjected to the research [29]; the modes of incoming and outgoing flows in reactors with thermal coupling are analyzed [30].…”

Section: Introductionmentioning

confidence: 99%

Virtual Soft Sensor of the Feedstock Composition of the Catalytic Reforming Unit

Koteleva

Tkachev

2021

Symmetry

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The paper discusses a method for obtaining a matrix of individual and group composition of a hydrotreated heavy gasoline fraction in industrial conditions based on the fractional composition obtained by the distillation method according to the ASTM D86 (the Russian analogue of such a standard is GOST 2177). A method for bounds estimation of the retention index (RI) change is considered on the basis of the symmetry of the RI change range relative to its arithmetic mean. Implementation of this method is performed by simulation of individual composition of C6–C12 feedstock of the catalytic reforming unit in the software package. For this purpose, the boiling curve of individual composition of hydrocarbon mixture is converted into the corresponding curve of fractional composition. The presented technique of creating a virtual soft sensor makes it possible to establish a correct relationship between the fractional composition and the individual hydrocarbon composition obtained according to the IFP 9301 (GOST R 52714) (Russian GOST R 52714 and international IFP 9301 standards for the determination of individual and group composition of hydrocarbon mixtures by capillary gas chromatography). The virtual soft sensor is based on chemical and mathematical principles. The application of this technique on the data of a real oil refinery is shown. Obtaining accurate data by means of a virtual soft sensor on the individual composition of feedstock will make it possible to optimize the catalytic reforming process and thus indirectly improve its environmental friendliness and enrichment efficiency.

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An investigative study on replacing the conventional furnaces of naphtha reforming with chemical looping combustion for clean hydrogen production

Cited by 16 publications

References 70 publications

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

Inherent CO₂ Capture and H₂ Production Enhancement in a New Glycerol Steam Reformer Coupled with Chemical Looping Combustion

Virtual Soft Sensor of the Feedstock Composition of the Catalytic Reforming Unit

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An investigative study on replacing the conventional furnaces of naphtha reforming with chemical looping combustion for clean hydrogen production

Cited by 16 publications

References 70 publications

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

Photovoltaic Electrochemically Driven Degradation of Calcon Dye with Simultaneous Green Hydrogen Production

Inherent CO2 Capture and H2 Production Enhancement in a New Glycerol Steam Reformer Coupled with Chemical Looping Combustion

Virtual Soft Sensor of the Feedstock Composition of the Catalytic Reforming Unit

Contact Info

Product

Resources

About

Inherent CO₂ Capture and H₂ Production Enhancement in a New Glycerol Steam Reformer Coupled with Chemical Looping Combustion