Performance of Cu‐Fe‐based oxygen carrier in a CLC process based on fixed bed reactors

Tian, Qiang; Li-xin, Che; Ding, Bin; Wang, Qianwei; Su, Qingquan

doi:10.1002/ghg.1684

Cited by 8 publications

(9 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ratio between the CO consumption of the Cu10/Al90 sample and that of the fresh Cu10/Al90 sample was considered equivalent to the proportion of the oxidative species in the Cu10/Al90 sample. The CO consumption could be determined by the difference between the time integral of the inlet CO concentration and that of the outlet CO concentration . The proportion of the oxidative species in the Ni10/Al90 sample was determined with the same method.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Luo

et al. 2019

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

Background To meet more stringent automobile exhaust emission standards without using platinum group metal three‐way catalysts (TWCs), two nonprecious metal oxide oxygen carriers, Cu10/Al90 and Ni10/Al90, were investigated for the simultaneous and thorough removal of nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (HC) from automobile exhaust. Results In oxidation reactions of the reductive oxygen carriers with NO, the reductive oxygen carriers were converted to the oxidative oxygen carriers and NO was simultaneously reduced to N2. Then, the oxidative oxygen carriers were regenerated to the reductive oxygen carriers with reducing gases, including CO, H2 and HC. At the same time, CO was converted to CO2, H2 was converted to H2O, and HC was converted to CO2 and H2O. The simultaneous removal of NOx, CO and HC could be achieved based on a chemical looping combustion mechanism. Compared with Ni10/Al90, Cu10/Al90 exhibited better performance for removing NO, CO and C3H6 from simulated automobile exhaust. However, the reductive Ni10/Al90 had an excellent steam reforming catalytic activity and was capable of converting residual C3H6 in the exhaust to harmless H2 and CO2. Conclusion Based on these findings, a novel chemical looping combustion process is proposed, in which the first oxygen carrier‐filling layer based on Cu10/Al90 removed NOx, CO and HC simultaneously, and the second oxygen carrier‐filling layer based on Ni10/Al90 removed residual NO and C3H6. © 2019 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

“…The CO consumption could be determined by the difference between the time integral of the inlet CO concentration and that of the outlet CO concentration. 38 The proportion of the oxidative species in the Ni10/Al90 sample was determined with the same method.…”

Section: Reactivity Of Oxygen Carriers With a Simulated Automotive Exmentioning

confidence: 99%

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Luo

et al. 2019

J of Chemical Tech & Biotech

Self Cite

View full text Add to dashboard Cite

show abstract

“…To eliminate the pre-reforming step of CH 4 , a Cu-Fe-based OC of Cu30-Fe50/Al20-M was developed. 18 This OC could perform in a stable manner within a T w of 600°C-900°C, where the OC had good resistance to carbon deposition and sintering.…”

Section: Introductionmentioning

confidence: 99%

“…However, the practical application of this process was limited because the system is relatively complicated and the T w of OC is narrow. To eliminate the pre‐reforming step of CH 4 , a Cu–Fe‐based OC of Cu30–Fe50/Al20‐M was developed . This OC could perform in a stable manner within a T w of 600°C–900°C, where the OC had good resistance to carbon deposition and sintering.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Cu–Fe‐based oxygen carrier combined with a Ni‐based oxygen carrier in a chemical‐looping combustion process based on fixed‐bed reactors

Tian

Li-xin²,

Ding³

et al. 2018

Greenhouse Gases

Self Cite

View full text Add to dashboard Cite

The application of chemical‐looping combustion (CLC) based on fixed‐bed reactors for distributed medium‐ and small‐scale hot‐water and steam gas‐fuelled boilers is promising due to its low NOx emission, high energy efficiency and nearly zero energy consumption in carbon capture. For fixed‐bed reactors, a wide operating temperature window (Tw) for the oxygen carrier (OC) is crucial to ensure the performance and cycle life of the OC. The performance of Cu30–Fe50/Al20‐M combined with different Ni‐based OCs was investigated to extend the Tw(L) of 600°C for Cu30–Fe50/Al20‐M to a lower temperature, which was developed previously. The different Ni‐based OCs would work as CH4 steam reforming catalysts if their required reduction temperatures were significantly lower than the Tw(L) of Cu30–Fe50/Al20‐M. Results showed that a Ni‐based OC of Ni60/Al40‐M could be reduced with CH4/H2O with an S/C of 1.0 at a temperature of 450°C. The combination of Cu30–Fe50/Al20 and Ni25/Al75‐I, which was packed in the bed by a mixing method, exhibited a low‐temperature reactivity and Tw(L) was lowered from 600°C to 490°C. Moreover, carbon deposition and an intermediate compound, NiFe2O4, which was found in a composite OC of Ni–Cu–Fe–/Al, were not detected during the reduction step. Based on the results, a new CLC process, which was characterised by an integrated methane steam reforming in the reduction step, was proposed. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

“…However, because of the system being complicate, its practical application is limited. On the basis of this process, authors [15] employed a Cu-Fe based OC to react with CH 4 directly and relieved the problems of sintering and carbon deposition for CuO at higher temperatures and thus the upper temperature limit of the OC was successfully raised. However, the lower temperature limit of its operating temperature window is still required to be lowered.…”

Section: Introductionmentioning

confidence: 99%

Performance of a Cu-based oxygen carrier with pressurized CH4 in a fixed bed CLC process

Tian¹,

Su²

2017

Proceedings of the 2017 2nd International Conference on Civil, Transportation and Environmental Engineering (ICCTE 2017)

Self Cite

View full text Add to dashboard Cite

In order to broaden the operating temperature window of a Cu-based oxygen carrier (OC) in a chemical-looping combustion (CLC) process based on two fixed bed reactors, in which there exist great temperature distributions in radial and axial directions, through reducing its lower temperature limit, an experimental study on the performance of Cu60/Al40 with pressurized CH 4 was carried out in a CH 4 pressure range from 0.1MPa to 0.9MPa. Results showed that with CH 4 pressure increasing, the reduction rate of OC was improved, so the lower temperature limit was lowered from 555°C at 0.1MPa to below 500°C at 0.9MPa. Although carbon deposition in the reduction step became worse with the pressure increasing, it could be depressed with adding steam to CH 4 , and when the reduction temperature was below 700°C, the deposited carbon could be completely removed in the following oxidation step. The fixed bed CLC process based on an OC that has a wide operating temperature window is applicable to the distributed medium & small scale hot water & steam gas-fueled boilers.

show abstract

Performance of Cu‐Fe‐based oxygen carrier in a CLC process based on fixed bed reactors

Cited by 8 publications

References 25 publications

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Performance of a Cu–Fe‐based oxygen carrier combined with a Ni‐based oxygen carrier in a chemical‐looping combustion process based on fixed‐bed reactors

Performance of a Cu-based oxygen carrier with pressurized CH4 in a fixed bed CLC process

Contact Info

Product

Resources

About

Performance of Cu‐Fe‐based oxygen carrier in a CLC process based on fixed bed reactors

Cited by 8 publications

References 25 publications

Removing NOx, CO and HC from automobile exhaust based on chemical looping combustion

Removing NOx, CO and HC from automobile exhaust based on chemical looping combustion

Performance of a Cu–Fe‐based oxygen carrier combined with a Ni‐based oxygen carrier in a chemical‐looping combustion process based on fixed‐bed reactors

Performance of a Cu-based oxygen carrier with pressurized CH4 in a fixed bed CLC process

Contact Info

Product

Resources

About

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion

Removing NO_x, CO and HC from automobile exhaust based on chemical looping combustion