Hydrogen production via chemical looping steam methane reforming process: Effect of cerium and calcium promoters on the performance of Fe2O3/Al2O3 oxygen carrier

Hafizi, Ali; Rahimpour, Mohammad Reza; Hassanajili, Shadi

doi:10.1016/j.apenergy.2015.12.100

Cited by 129 publications

(48 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is noteworthy to say that previous works also used a fixed bed reactor for chemical looping reforming process [15,43,44]. In this regard, the oxygen carriers were tested by reduction-oxidation (redox) multi-cycles of gas-solid reaction.…”

Section: Process Activitymentioning

confidence: 99%

“…It has received much attention due to its low cost and high availability [13]. As indicated in Figure 1, in chemical looping steam methane reforming (CL-SMR) process, methane is converted to synthesis gas in contact with oxygen carriers in the fuel reactor while the reduced oxygen carriers is reoxidized in the air reactor [14,15]. The principle reactions that occur in the fuel reactor of CL-SMR process are as follows [16][17][18]:…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Application of Cerium-Incorporated SBA-16 Supported Ni-Based Oxygen Carrier in Cyclic Chemical Looping Steam Methane Reforming

et al. 2018

View full text Add to dashboard Cite

Hydrogen, as a clean energy carrier, could be produced aided by cyclic oxidation-reduction of oxygen carriers (OCs) in contact with carbonaceous fuel in chemical looping steam methane reforming (CL-SMR) process. In this study, the cerium was incorporated into the SBA-16 support structure to synthesize the Ni/Ce-SBA-16 OC. The supports were synthesized using hydrothermal method followed by impregnation of Ni and characterized via low and wide angle X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), scanning electron microscopy (SEM), coupled with energy dispersive X-ray (EDX) spectroscopy, and transmission electron micrograph (TEM) techniques. In addition, the effect of various Si/Ce molar ratios (20-60) in the support structure, Ni loading (10-30 wt %), reaction temperature (500-750 • C), and life time of optimal oxygen carrier over 16 cycles were investigated. The results of wide angle XRD and SEM revealed that the incorporation of CeO 2 in the channels of SBA-16 caused the formation of nickel metallic particles with smaller size and prevents the coke formation. The results showed that OC with 15 wt % Ni and Si/Ce molar ratio of 40 (15Ni/Ce-SBA-16(40)) has the best performance when compared with other OCs in terms of catalytic activity and structural properties. The methane conversion of about 99.7% was achieved at 700 • C using 15Ni/Ce-SBA-16(40) OC. We anticipate that the strategy can be extended to investigate a variety of novel modified mesoporous silica as the supporting material for the Ni based OCs.

show abstract

Section: Process Activitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of Cerium-Incorporated SBA-16 Supported Ni-Based Oxygen Carrier in Cyclic Chemical Looping Steam Methane Reforming

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Then they decreased with slight slope in the next three cycles and after that remained constant. Coke formation on the surface of 25Ni/SBA-16 and/or agglomeration of Ni particles can be the result of this reduction in the catalytic activity [19].…”

Section: Life Time Of 25ni/sba-16 and 25ni-25y/sba-16 Oxygen Carriersmentioning

confidence: 99%

“…Steam methane reforming (SMR) is the most commonly used process in industry for the generation of H 2 [16,17]. However, SMR is energy intensive process and needs high level of capital investment that is not economically [18,19]. As an alternative method, chemical looping steam methane reforming (CL-SMR) process was proposed in order to overcome these drawbacks [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…The OC needs to possess adequate stability over multiple reduction-oxidation (redox) cycles. It also should have high methane conversion and selectivity to syngas, negligible coke deposition, high oxygen transfer rate and considerable strength to agglomeration, attrition, fragmentation and other chemical and mechanical degeneration types [2,19,22,24]. Among the various oxygen carriers, nickel-based OCs are the most promising and attractive candidate as active phase for CL-SMR process because of their high activity and selectivity toward H2 production.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrogen Production from Cyclic Chemical Looping Steam Methane Reforming over Yttrium Promoted Ni/SBA-16 Oxygen Carrier

et al. 2017

View full text Add to dashboard Cite

Abstract:In this work, the modification of Ni/SBA-16 oxygen carrier (OC) with yttrium promoter is investigated. The yttrium promoted Ni-based oxygen carrier was synthesized via co-impregnation method and applied in chemical looping steam methane reforming (CL-SMR) process, which is used for the production of clean energy carrier. The reaction temperature (500-750 • C), Y loading (2.5-7.4 wt. %), steam/carbon molar ratio (1-5), Ni loading (10-30 wt. %) and life time of OCs over 16 cycles at 650 • C were studied to investigate and optimize the structure of OC and process temperature with maximizing average methane conversion and hydrogen production yield. The synthesized OCs were characterized by multiples techniques. The results of X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX) of reacted OCs showed that the presence of Y particles on the surface of OCs reduces the coke formation. The smaller NiO species were found for the yttrium promoted OC and therefore the distribution of Ni particles was improved. The reduction-oxidation (redox) results revealed that 25Ni-2.5Y/SBA-16 OC has the highest catalytic activity of about 99.83% average CH 4 conversion and 85.34% H 2 production yield at reduction temperature of 650 • C with the steam to carbon molar ratio of 2.

show abstract

Photocatalytic Oxygen Evolution

Li¹,

Wang²

2022

Photo‐ and Electro‐Catalytic Processes

View full text Add to dashboard Cite

Hydrogen production via chemical looping steam methane reforming process: Effect of cerium and calcium promoters on the performance of Fe2O3/Al2O3 oxygen carrier

Cited by 129 publications

References 41 publications

Synthesis and Application of Cerium-Incorporated SBA-16 Supported Ni-Based Oxygen Carrier in Cyclic Chemical Looping Steam Methane Reforming

Synthesis and Application of Cerium-Incorporated SBA-16 Supported Ni-Based Oxygen Carrier in Cyclic Chemical Looping Steam Methane Reforming

Hydrogen Production from Cyclic Chemical Looping Steam Methane Reforming over Yttrium Promoted Ni/SBA-16 Oxygen Carrier

Photocatalytic Oxygen Evolution

Contact Info

Product

Resources

About