Preparation of nanocrystalline ZSM-5 and its catalytic performance in fast pyrolysis of cellulose to produce aromatic hydrocarbons

2022 ◽  
pp. 111679
Author(s):  
Kongyan Yang ◽  
Feng Zhou ◽  
Huixia Ma ◽  
Chuntao Liu ◽  
Fangwei Ma ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Fast Pyrolysis ◽  
Catalytic Performance

scholarly journals Novel Micro-Mesoporous Composite ZSM-5 Catalyst for Aromatics Production by Catalytic Fast Pyrolysis of Lignin Residues

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 378 ◽  
Author(s):  
Wenbo Wang ◽  
Zhongyang Luo ◽  
Simin Li ◽  
Shuang Xue ◽  
Haoran Sun
Keyword(s):  
Aromatic Hydrocarbons ◽  
Fast Pyrolysis ◽  
Catalytic Performance ◽  
Zeolite Catalysts ◽  
Mesoporous Composite ◽  
High Oxygen Content ◽  
Catalytic Fast Pyrolysis ◽  
Industrial Utilization ◽  
Polycyclic Aromatic ◽  
Pyrolytic Lignin

The industrial utilization of lignocellulosic biomass is often accompanied by lots of lignin residues. Catalytic fast pyrolysis (CFP) is a high-throughput method to convert lignin to aromatics and phenolics. In order to optimize catalytic performance, conventional zeolite catalysts often need to have mesostructural modification. Here, based on hierarchical zeolite (HZ), a novel micro-mesoporous composite zeolite was obtained by redeposition under mild conditions. The conversion of two industrial lignin residues, Kraft Lignin (KL) and Pyrolytic Lignin (PL), was investigated. Interestingly, the hierarchical sample was more suitable for the case of higher concentration of primary pyrolysis products such as CFP of PL, with aromatics yield of 12.7 wt % and a monocyclic aromatic hydrocarbons (MAHs) to polycyclic aromatic hydrocarbons (PAHs) mass ratio of 4.86. The mesoporous composite zeolite possessed a better PAHs suppression capability as M/P reached 6.06, and was suitable for low reactants’ concentration and high oxygen content, such as KL CFP, with a higher aromatics yield of 3.3 wt % and M/P of 5.12. These results were compared with poplar sawdust as actual biomass, and mesoporous samples were both highly efficient catalysts with MAHs yield over 10 wt % and M/P around 5.

scholarly journals Hierarchical H-ZSM5 zeolites based on natural kaolinite as a high-performance catalyst for methanol to aromatic hydrocarbons conversion

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ahmad Asghari ◽  
Mohammadreza Khanmohammadi Khorrami ◽  
Sayed Habib Kazemi
Keyword(s):  
Pore Size ◽  
Aromatic Hydrocarbons ◽  
High Performance ◽  
Low Cost ◽  
Direct Synthesis ◽  
Fixed Bed ◽  
Methanol Conversion ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Good Prospect

AbstractThe present work introduces a good prospect for the development of hierarchical catalysts with excellent catalytic performance in the methanol to aromatic hydrocarbons conversion (MTA) process. Hierarchical H-ZSM5 zeolites, with a tailored pore size and different Si/Al ratios, were synthesized directly using natural kaolin clay as a low-cost silica and aluminium resource. Further explored for the direct synthesis of hierarchical HZSM-5 structures was the steam assisted conversion (SAC) with a cost-effective and green affordable saccharide source of high fructose corn syrup (HFCS), as a secondary mesopore agent. The fabricated zeolites exhibiting good crystallinity, 2D and 3D nanostructures, high specific surface area, tailored pore size, and tunable acidity. Finally, the catalyst performance in the conversion of methanol to aromatic hydrocarbons was tested in a fixed bed reactor. The synthesized H-ZSM5 catalysts exhibited superior methanol conversion (over 100 h up to 90%) and selectivity (over 85%) in the methanol conversion to aromatic hydrocarbon products.

scholarly journals Hydro-Pyrolysis and Catalytic Upgrading of Biomass and Its Hydroxy Residue Fast Pyrolysis Vapors

Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3474 ◽  
Author(s):  
Yichen Liu ◽  
James J. Leahy ◽  
Jacek Grams ◽  
Witold Kwapinski
Keyword(s):  
Aromatic Hydrocarbons ◽  
Average Molecular Weight ◽  
Fast Pyrolysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Pyrolysis Gas ◽  
Catalytic Upgrading ◽  
Lower Viscosity ◽  
Bio Oil ◽  
Sulfated Tio2 ◽  
Hydrolysis Residue

Fast pyrolysis of Miscanthus, its hydrolysis residue and lignin were carried with a pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) followed by online vapor catalytic upgrading with sulfated ZrO2, sulfated TiO2 and sulfated 60 wt.% ZrO2-TiO2. The most evident influence of the catalyst on the vapor phase composition was observed for aromatic hydrocarbons, light phenols and heavy phenols. A larger amount of light phenols was detected, especially when 60 wt.% ZrO2-TiO2 was present. Thus, a lower average molecular weight and lower viscosity of bio-oil could be obtained with this catalyst. Pyrolysis was also performed at different pressures of hydrogen. The pressure of H2 has a great effect on the overall yield and the composition of biomass vapors. The peak area percentages of both aromatic hydrocarbons and cyclo-alkanes are enhanced with the increasing of H2 pressure. The overall yields are higher with the addition of either H2 or sulfated catalysts. This is beneficial as phenols are valuable chemicals, thus, increasing the value of bio-oil. The results show that the hydrolysis residue has the potential to become a resource for phenol production.

scholarly journals Catalytic Activity of Polynuclear vs. Dinuclear Aroylhydrazone Cu(II) Complexes in Microwave-Assisted Oxidation of Neat Aliphatic and Aromatic Hydrocarbons

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 47 ◽  
Author(s):  
Manas Sutradhar ◽  
Tannistha Barman ◽  
Armando Pombeiro ◽  
Luísa Martins
Keyword(s):  
Catalytic Activity ◽  
Aromatic Hydrocarbons ◽  
Catalytic Performance ◽  
Antiproliferative Agents ◽  
One Dimensional ◽  
X Ray ◽  
X Ray Crystallography ◽  
Mild Conditions ◽  
Microwave Assisted ◽  
Aliphatic And Aromatic Hydrocarbons

One-dimensional (1D) polynuclear Cu(II) complex (1) derived from (5-bromo-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (H2L) is synthesized and characterized by elemental analysis, IR spectroscopy, ESI-MS, and single crystal X-ray crystallography. Its catalytic performance towards the solvent-free microwave-assisted peroxidative oxidation of aliphatic and aromatic hydrocarbons under mild conditions is compared with that of dinuclear Cu(II) complexes (2 and 3) of the same ligand, previously reported as antiproliferative agents. Polymer 1 exhibits the highest activity, either for the oxidation of cyclohexane (leading to overall yields, based on the alkane, of up to 39% of cyclohexanol and cyclohexanone) or towards the oxidation of toluene (selectively affording benzaldehyde up to a 44% yield), after 2 or 2.5 h of irradiation at 80 or 50 °C, respectively.

Ultra-fast pyrolysis of ferrocene to form Fe/C heterostructures as robust oxygen evolution electrocatalysts

2018 ◽  
Vol 6 (43) ◽  
pp. 21577-21584 ◽  
Author(s):  
Taotao Gao ◽  
Caixia Zhou ◽  
Yajie Zhang ◽  
Zhaoyu Jin ◽  
Hongyan Yuan ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Fast Pyrolysis ◽  
Catalytic Performance ◽  
Microwave Assisted

Fe/C heterostructures obtained via microwave-assisted and CNT-inducted ultra-fast pyrolysis of ferrocene show robust catalytic performance for the oxygen evolution reaction.

scholarly journals Ex situ catalytic fast pyrolysis of soy sauce residue with HZSM-5 for co-production of aromatic hydrocarbons and supercapacitor materials

RSC Advances ◽  
2020 ◽  
Vol 10 (39) ◽  
pp. 23331-23340
Author(s):  
Kai Li ◽  
Dana Bolatibieke ◽  
Shi-guan Yang ◽  
Bo Wang ◽  
Dong-hong Nan ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Fast Pyrolysis ◽  
Soy Sauce ◽  
New Method ◽  
Ex Situ ◽  
Catalytic Fast Pyrolysis

A new method to co-produce aromatic hydrocarbons and a supercapacitor material from the catalytic fast pyrolysis of soy sauce residue has been developed.

Catalytic fast pyrolysis of biomass: superior selectivity of hierarchical zeolites to aromatics

2017 ◽  
Vol 19 (22) ◽  
pp. 5442-5459 ◽  
Author(s):  
L. Y. Jia ◽  
M. Raad ◽  
S. Hamieh ◽  
J. Toufaily ◽  
T. Hamieh ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Aromatic Hydrocarbons ◽  
Fast Pyrolysis ◽  
Biomass Pyrolysis ◽  
Hierarchical Zeolites ◽  
Catalytic Fast Pyrolysis ◽  
Pyrolysis Of Biomass ◽  
Zeolite Crystals

Mesopores are “highways” for mass transfer inside zeolite crystals and enhance the formation of mono-aromatic hydrocarbons from biomass pyrolysis.

scholarly journals In-Situ Catalytic Fast Pyrolysis of Pinecone over HY Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1034
Author(s):  
Jaehun Jeong ◽  
Hyung Won Lee ◽  
Seong Ho Jang ◽  
Sumin Ryu ◽  
Young-Min Kim ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Fast Pyrolysis ◽  
Decomposition Temperature ◽  
Hydrocarbon Production ◽  
Catalytic Fast Pyrolysis ◽  
Main Decomposition ◽  
Monoaromatic Hydrocarbons ◽  
Additional Role

The in-situ catalytic fast pyrolysis of pinecone over HY catalysts, HY(30; SiO2/Al2O3), HY(60), and 1% Ni/HY(30), was studied by TGA and Py-GC/MS. Thermal and catalytic TGA indicated that the main decomposition temperature region of pinecone, from 200 to 400 °C, was not changed using HY catalysts. On the other hand, the DTG peak heights were differentiated by the additional use of HY catalysts. Py-GC/MS analysis showed that the efficient conversion of phenols and other oxygenates formed from the pyrolysis of pinecone to aromatic hydrocarbons could be achieved using HY catalysts. Of the HY catalysts assessed, HY(30), showed higher efficiency in the production of aromatic hydrocarbons than HY(60) because of its higher acidity. The aromatic hydrocarbon production was increased further by increasing the pyrolysis temperature from 500 to 600 °C and increasing the amount of catalyst due to the enhanced cracking ability and overall acidity. The use of 1% Ni/HY(30) also increased the amount of monoaromatic hydrocarbons compared to the use of HY(30) due to the additional role of Ni in enhancing the deoxygenation and aromatization of reaction intermediates.

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