“BTX” from Guaiacol HDO under Atmospheric Pressure: Effect of Support and Carbon Deposition

Xu, Xinhua; Jiang, Enchen

doi:10.1021/acs.energyfuels.6b02700

Cited by 30 publications

(6 citation statements)

References 40 publications

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“…It is consistent with the report that Fe was conducive for resisting carbon deposition and metal sintering. 41 It is possible that the stability of the Fe−Ni alloy is higher than Ni.…”

Section: + → +mentioning

confidence: 99%

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Ren

et al. 2018

ACS Sustainable Chem. Eng.

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A renewable H2 was obtained via catalytic reforming/cracking of rice husk pyrolysis volatiles (RHPV) with the catalyst-employed rice husk pyrolysis carbon (RHPC) as the support. Five differently treated processes such as pyrolysis impregnation (P-I), impregnation pyrolysis (I-P), activation, acid washing (A-W), and calcining in air were employed to improve the catalytic activity and stability of the catalysts. The catalytic activity for bio-oil, gas, and real pyrolysis volatiles was investigated. The role of Fe and Ni was also investigated. The H2 content reached 50% for bio-oil. The catalytic activity and stability were in the following order: 0.1FeNi/RHPC(P-I) > 0.1FeNi/RHPC(A-W) ≈ 0.1FeNi/RHA > 0.1FeNi/RHPC-2(I-P) > 0.1FeNi/AC (active carbon), which is consistent with the results of BET and NH3-TPD. It suggests that the highly active RHPC support catalyst is prepared avoiding pretreatment, activation, and calcination, which makes the preparation procedure of catalysts simple and energy saving. Bio-oil, gas, and real pyrolysis volatiles were employed to investigate the interaction and the catalytic reforming mechanism. Moreover, the characterization of the catalysts showed that the active center is the FeNi nanoalloy, and the RHPC support was an intermediate reductant to keep the stability of the catalyst via reducing the metal oxides.

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“…It is consistent with the report that Fe was conducive for resisting carbon deposition and metal sintering. 41 It is possible that the stability of the Fe−Ni alloy is higher than Ni.…”

Section: + → +mentioning

confidence: 99%

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Ren

et al. 2018

ACS Sustainable Chem. Eng.

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“…At present, aromatics are produced from fossil petroleum via a multistep process in the industry . Considering the urgent demand for aromatics as well as the depletion of fossil reserves, the alternative method for obtaining aromatics from bio-oil is probably considered as the most economical and promising process. , However, the yield of aromatics obtained in crude bio-oil from biomass pyrolysis is very low due to the high oxygen content. Thus, it is necessary to increase the aromatic yield via bio-oil upgrading.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Hydrodeoxygenation of Bio-oil via Bimetallic Ni-V Catalysts Modified by Cross-Surface Migrated-Carbon from Biochar

Liang

Yang

et al. 2021

ACS Appl. Mater. Interfaces

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Aromatics from selective hydrodeoxygenation (HDO) of biomass-derived bio-oil are an ideal feedstock for replacing industrial fossil products. In this study, biochar-modified Hβ/Ni-V catalysts were prepared and tested in the atmospheric HDO of guaiacol and bio-oil to produce aromatics. Compared with unmodified Hβ/Ni-V, higher HDO activity was achieved in catalysts with all kinds of biochar modifications. Especially, the pine nut shell biochar (PB)-modified PB-Hβ-8/Ni-V showed the highest selectivity to aromatics (69.17%), mainly including benzene and toluene. Besides, under the conditions of 380 °C and weight hourly space velocity (WHSV) of 0.5 h −1 , the cleavage of C Ar −OH (C Ar means the carbon in the benzene ring) was promoted to form more aromatics. Moreover, great recyclability (58.77% aromatics for the reactivated run-3 test) and efficient HDO of bio-oil (44.9% aromatic yield) were also achieved. Based on the characterization results, the enhanced aromatic selectivity of PB-Hβ-8/Ni-V was attributed to the synergetic effect between PB and Hβ/Ni-V. In detail, a stable surface migrated-carbon layer was formed on Hβ/Ni-V via the metal catalytic chemical vapor deposition (CVD) process of the pyrolysis PB volatiles. Simultaneously, a carbothermal reduction driven by the migrated-carbon took place to decorate the surface metals, obtaining more Ni 0 and V 3+ active sites. With this synergism, increased Ni 0 sites promoted H 2 adsorption and dissociation, which improved the hydrogenation activity. Furthermore, the higher affinity of the reactant and increased oxygen vacancies both contributed to enhancing the selective surface adsorption of oxygenous groups and the cleavage of the C Ar −OH bond, thus improving the deoxygenation activity. Therefore, the HDO activity was improved to form more target aromatics over biochar-modified catalysts. This work highlighted a potential avenue to develop economic and environmental catalysts for the upgrading of bio-oil.

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“…This has become a challenge for the oil producing industry since a large group of chemicals can still be obtained from oil and natural gas only. Thus, despite of the intensified studies on the possibility to obtain the benzene, toluene, and xylene (BTX) fraction from alternative sources such as plastic waste as well as bio oil components [2][3][4][5][6], oil resources are still the primary method of BTX fraction recovery [7][8][9]. The demand for aromatic hydrocarbons and BTX fraction as their primary source has been increasing from year to year because of the consistently growing polymers market.…”

Section: Introductionmentioning

confidence: 99%

In Situ Generated Nanosized Sulfide Ni-W Catalysts Based on Zeolite for the Hydrocracking of the Pyrolysis Fuel Oil into the BTX Fraction

et al. 2020

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The hydrocracking reaction of a pyrolysis fuel oil fraction using in situ generated nano-sized NiWS-sulfide catalysts is studied. The obtained catalysts were defined using X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The features of catalytically active phase generation, as well as its structure and morphology were considered. The catalytic reactivity of in situ generated catalysts was evaluated using the hydrocracking reaction of pyrolysis fuel oil to obtain a light fraction to be used as a feedstock for benzene, toluene, and xylene (BTX) production. It was demonstrated that the temperature of 380 °C, pressure of 5 MPa, and catalyst-to-feedstock ratio of 4% provide for a target fraction (IPB −180 °C) yield of 44 wt %, and the BTX yield of reaching 15 wt %.

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“BTX” from Guaiacol HDO under Atmospheric Pressure: Effect of Support and Carbon Deposition

Cited by 30 publications

References 40 publications

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Hydrogen from Rice Husk Pyrolysis Volatiles via Non-Noble Ni–Fe Catalysts Supported on Five Differently Treated Rice Husk Pyrolysis Carbon Supports

Enhancing Hydrodeoxygenation of Bio-oil via Bimetallic Ni-V Catalysts Modified by Cross-Surface Migrated-Carbon from Biochar

In Situ Generated Nanosized Sulfide Ni-W Catalysts Based on Zeolite for the Hydrocracking of the Pyrolysis Fuel Oil into the BTX Fraction

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