Hydrogen from pyroligneous acid via modified bimetal Al-SBA-15 catalysts

Xu, Xiwei; Li, Zhiyu; Chen, Xiao; Jiang, Enchen

doi:10.1016/j.apcata.2017.08.030

Cited by 13 publications

(8 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis of supplied oxygen properties of OCs for CH 4 chemical looping consumption was performed in the fixed bed at 800 °C. A 5 g portion of oxygen carrier was placed in the reactor, which was used in our previous research . After reaching the setting temperature, CH 4 (20 vol % CH 4 /80 vol % N 2 ) was introduced into the fixed reactor.…”

Section: Methods and Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Supplied Oxygen Properties of NiO/NiAl₂O₄ in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Jiang

Wang

et al. 2018

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

In this paper, the oxygen supplied properties of NiO/NiAl2O4 synthesized via different methods were investigated. Imp OCs showed the highest effective oxygen amounts of 14.08% (9.32%(NiO) and 4.76% (NiAl2O4)) and medium oxygen releasing rate via CO-TGA. The O transfer rate of OCs synthesized with the precipitation method is slow due to the big particle size. The supplied oxygen content is much less at the first stage for OCs, because NiO is inside the NiAl2O4, and the strong interaction is between NiO and NiAl2O4. The supplied O rate of Imp OCs is proper (not too fast or too slow) due to the uniform distribution and moderate particle size of NiO, and there is a proper interaction between NiO and NiAl2O4. The CH4 chemical looping re-forming varied from the full oxidation (CH4 → CO2) to partial oxidation (CH4 → CO) followed by cleavage reaction (CH4 → H2 + C), depending on the content of effective supplied oxygen amount in OCs. Moreover, it also proved that CO-TGA and CH4 chemical looping re-forming in the fixed bed are two effective methods for analyzing the supplied oxygen properties of OCs.

show abstract

Section: Methods and Experimentsmentioning

confidence: 99%

“…A 5 g portion of oxygen carrier was placed in the reactor, which was used in our previous research. 16 After reaching the setting temperature, CH 4 (20 vol % CH 4 /80 vol % N 2 ) was introduced into the fixed reactor. The total gas flow rate was controlled by two mass flow controllers at 60 mL/min (room conditions).…”

Section: ■ Introductionmentioning

confidence: 99%

Supplied Oxygen Properties of NiO/NiAl₂O₄ in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Jiang

Wang

et al. 2018

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The composition of the product collected in a gas bag was analyzed using an Agilent gas chromatograph 6840 including an HP-PLOT/Q (30 m × 0.53 mm) and N 2 as carrier gas. The method is the same as in our previous research …”

Section: Methodsmentioning

confidence: 99%

“…For pyrolysis experiment, CH 4 conversion ( X CH 4 ) and CO 2 selectivity ( S CO 2 ) were calculated using eqs and R . The oxygen transfer amount in the CLR of biomass pyrolysis gas and steam reforming was determined as O release amount ( O re ) and O release amount ( O ab ), , which were calculated using eqs and where C t CH 4 and C t CH 4 are the relative volume fractions of CH 4 /CO 2 in the outlet gas, C 0 i is the relative volume fraction of the specie i in the inlet gas, parameters v t and v 0 are the volume flow rates of the outlet gas and inlet gas, respectively, O p(Oc) is the percent of element O in the different OCs, and m OCs is the mass of the OCs added in the reaction system.…”

Section: Methodsmentioning

confidence: 99%

“…Obtaining a wide-adaptability and high-active oxygen carrier plays the key role in promoting the development of the CLHP. Moreover, Ni is widely used in the field of catalysis due to its excellent activity for catalytic C−H, 11 which also obtained a positive effect on the oxidation performance in the CLC. Antzara 12 and Silvester 13 loaded Ni on different carriers, and the Ni-based oxygen carrier was applied to the chemical looping.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chemical Looping Hydrogen Generation over Ceria/Zirconia-Enhanced NiO–NiFe₂O₄ Oxygen Carrier

Jiang

Wang

et al. 2019

Energy Fuels

Self Cite

View full text Add to dashboard Cite

The objective of this paper is to systematically investigate the influences of different metal modification on the performance of Ni-ferrite as oxygen carrier (OCs) in chemical looping hydrogen (CLH) production. Ni-ferrite OCs were modified with single-metal NiO, bimetallic NiO/ZrO2, and bimetallic NiO/CeO2. The sample was characterized by CO thermogravimetric analysis, X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer–Emmett–Teller method. The results showed that NiO could promote the release of oxygen from Ni-ferrite, and the release of oxygen can reach about 99% at 800 °C. The addition of ZrO2 and CeO2 could further increase the oxygen release rate of the oxygen carrier, but the oxygen storage amount would decrease. However, the bimetallic modified OCs exhibited higher hydrogen yield, and the hydrogen yields of NiO/ZrO2- and NiO/CeO2-modified Ni-ferrite could reach 9800.0 and 8786.2 μmol g(OC) –1, respectively. Furthermore, the bimetallic modified oxygen carrier showed higher structural stability, in which the ZrO2 particles weaken the active particle contact by coating effect, while the CeO2 is mixed into the active particles to form steric hindrance, both of which can inhibit the sintering of the oxygen carrier to maintain structural stability. Finally, the oxygen carrier reaction mechanism is analyzed, and the results show that the oxygen atoms around Ni2+ first migrate through the existing vacancies. And the residual vacancies provided the space for the immigration of other nearby oxygen atoms, which enhanced migration velocity. Moreover, Fe3+ gradually transferred to the adjacent Ni2+ to generate Fe0.64Ni0.36 after its oxygen migration.

show abstract

Alumina as Solid‐State Ligand in Enhancing the Redox Catalytic Property of Iron Oxide Grafted AlSBA‐15 towards Arylation of Arene

et al. 2018

View full text Add to dashboard Cite

2–8 wt % iron has been grafted over SBA‐15 and 10 wt % alumina grafted SBA‐15 (AlSBA‐15) through selective extraction deposition technique using LaFeO3 as iron precursor in acidic solution. DRS‐UV spectra confirmed the presence of iron as isolated Fe(III), Fe(III)‐clusters and amorphous FeOx oligomers. SEM‐EDX mapping, FT‐IR, XPS, HR‐TEM and 27Al MAS NMR characterisation results confirmed that iron grafted over AlSBA‐15 preferentially reside on the alumina. The donor‐acceptor interaction of grafted iron ions with alumina atoms displaying Lewis acid properties stabilized iron at higher oxidation state Fe(III+δ). This increased the BE of Fe2p electrons (XPS) and shifted the temperature of iron reduction in 2–8 wt %Fe/AlSBA‐15 materials to higher value (600 °C) compared with Fe/SBA‐15 (H2‐TPR). In arylation of benzene, 8 wt %Fe/AlSBA‐15 demonstrated excellent redox catalytic activity with TOF close to homogeneous catalyst and 82 % biphenyl yield. The catalyst demonstrated consistent catalytic performance for 7 cycles.

show abstract

Hydrogen from pyroligneous acid via modified bimetal Al-SBA-15 catalysts

Cited by 13 publications

References 41 publications

Supplied Oxygen Properties of NiO/NiAl₂O₄ in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Supplied Oxygen Properties of NiO/NiAl₂O₄ in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Chemical Looping Hydrogen Generation over Ceria/Zirconia-Enhanced NiO–NiFe₂O₄ Oxygen Carrier

Alumina as Solid‐State Ligand in Enhancing the Redox Catalytic Property of Iron Oxide Grafted AlSBA‐15 towards Arylation of Arene

Contact Info

Product

Resources

About

Hydrogen from pyroligneous acid via modified bimetal Al-SBA-15 catalysts

Cited by 13 publications

References 41 publications

Supplied Oxygen Properties of NiO/NiAl2O4 in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Supplied Oxygen Properties of NiO/NiAl2O4 in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Chemical Looping Hydrogen Generation over Ceria/Zirconia-Enhanced NiO–NiFe2O4 Oxygen Carrier

Alumina as Solid‐State Ligand in Enhancing the Redox Catalytic Property of Iron Oxide Grafted AlSBA‐15 towards Arylation of Arene

Contact Info

Product

Resources

About

Supplied Oxygen Properties of NiO/NiAl₂O₄ in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Supplied Oxygen Properties of NiO/NiAl₂O₄ in Chemical Looping Re-Forming of Biomass Pyrolysis Gas: The Influence of Synthesis Method

Chemical Looping Hydrogen Generation over Ceria/Zirconia-Enhanced NiO–NiFe₂O₄ Oxygen Carrier