Catalytic Pyrolysis of Cotton Straw by Zeolites and Metal Oxides

2009 ◽  
pp. 648-652 ◽  
Author(s):  
X. X. Cao ◽  
B. X. Shen ◽  
F. Lu ◽  
Y. Yao
Keyword(s):  
Metal Oxides ◽  
Catalytic Pyrolysis

Aromatics production with metal oxides and ZSM-5 as catalysts in catalytic pyrolysis of wood sawdust

2019 ◽  
Vol 188 ◽  
pp. 146-152 ◽  
Author(s):  
Qingfeng Che ◽  
Minjiao Yang ◽  
Xianhua Wang ◽  
Xu Chen ◽  
Wei Chen ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Catalytic Pyrolysis ◽  
Wood Sawdust

Catalytic pyrolysis of polyethylene waste with Fuller’s earth clay and metal oxides under mild conditions

2022 ◽  
Author(s):  
Muhammad Shozab Mehdi ◽  
Muhammad Taqi Mehran ◽  
Salman Raza Naqvi ◽  
Shafiq Uz Zaman ◽  
Asif Hussain Khoja ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Catalytic Pyrolysis ◽  
Mild Conditions ◽  
Fuller’S Earth

Catalytic Pyrolysis of Poly(ethylene terephthalate) in the Presence of Metal Oxides for Aromatic Hydrocarbon Recovery Using Tandem μ-Reactor-GC/MS

2020 ◽  
Vol 34 (2) ◽  
pp. 2492-2500 ◽  
Author(s):  
Shogo Kumagai ◽  
Ryota Yamasaki ◽  
Tomohito Kameda ◽  
Yuko Saito ◽  
Atsushi Watanabe ◽  
...  
Keyword(s):  
Aromatic Hydrocarbon ◽  
Metal Oxides ◽  
Ethylene Terephthalate ◽  
Catalytic Pyrolysis ◽  
Hydrocarbon Recovery ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Catalytic Pyrolysis of Lignin for Directional Production of p-Xylene over Metal Oxides-Modified HZSM-5 Catalysts

2018 ◽  
Vol 38 (8) ◽  
pp. 2101 ◽  
Author(s):  
Qifang Jia ◽  
Lijuan Zhu ◽  
Minghui Fan ◽  
Quanxin Li
Keyword(s):  
Metal Oxides ◽  
Catalytic Pyrolysis

Catalytic pyrolysis of cellulose with sulfated metal oxides: A promising method for obtaining high yield of light furan compounds

2009 ◽  
Vol 100 (20) ◽  
pp. 4871-4876 ◽  
Author(s):  
Qiang Lu ◽  
Wan-Ming Xiong ◽  
Wen-Zhi Li ◽  
Qing-Xiang Guo ◽  
Xi-Feng Zhu
Keyword(s):  
Metal Oxides ◽  
Catalytic Pyrolysis ◽  
Promising Method ◽  
High Yield

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

Problems with oxygen analysis in the system MgO-Al2O3-SiO2 with the electron microprobe

1992 ◽  
Vol 50 (2) ◽  
pp. 1624-1625
Author(s):  
Michel Fialin ◽  
Guy Rémond
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Electrostatic Charge ◽  
Carbon Layer ◽  
Sample Holder ◽  
Rock Matrix ◽  
Electrical Discharges ◽  
Thin Carbon ◽  
Beam Instabilities

Oxygen-bearing minerals are generally strong insulators (e.g. silicates), or if not (e.g. transition metal oxides), they are included within a rock matrix which electrically isolates them from the sample holder contacts. In this respect, a thin carbon layer (150 Å in our laboratory) is evaporated on the sections in order to restore the conductivity. For silicates, overestimated oxygen concentrations are usually noted when transition metal oxides are used as standards. These trends corroborate the results of Bastin and Heijligers on MgO, Al2O3 and SiO2. According to our experiments, these errors are independent of the accelerating voltage used (fig.l).Owing to the low density of preexisting defects within the Al2O3 single-crystal, no significant charge buildup occurs under irradiation at low accelerating voltage (< 10keV). As a consequence, neither beam instabilities, due to electrical discharges within the excited volume, nor losses of energy for beam electrons before striking the sample, due to the presence of the electrostatic charge-induced potential, are noted : measurements from both coated and uncoated samples give comparable results which demonstrates that the carbon coating is not the cause of the observed errors.

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