Determination of Acid Structures on the Surface of Sulfated Monoclinic and Tetragonal Zirconia through Experimental and Theoretical Approaches

2021 ◽  
Author(s):  
Daofeng Huang ◽  
Siyue Chen ◽  
Sicong Ma ◽  
Xin Chen ◽  
Yuanhang Ren ◽  
...  
Keyword(s):  
Sulfated Zirconia ◽  
Tetragonal Phase ◽  
Solid Acid ◽  
Tetragonal Zirconia ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Theoretical Approaches

Sulfated zirconia (SZ) plays an important role in solid acid catalysts. To understand the origin of the super acidity over the surface of sulfated zirconia, pure monoclinic and tetragonal phase...

The Effect of Rare Earth Modification on the Structure and Catalytic Performance of SO42-/ZrO2 Solid Acid Catalysts

2011 ◽  
Vol 287-290 ◽  
pp. 1375-1378
Author(s):  
Ying Chen ◽  
Bao Hui Wang ◽  
Xue Sun ◽  
Hui Li
Keyword(s):  
Rare Earth ◽  
Solid Acid ◽  
Tetragonal Zirconia ◽  
Acid Methyl Ester ◽  
Catalytic Performance ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
X Ray Diffraction ◽  
Ft Ir ◽  
Xrd Patterns

Rare earth modified SO2-4/ZrO2 solid acid catalysts were prepared by coprecipitation and impregnation methods respectively. The properties of the samples were characterized by XRD (X-ray diffraction), FT-IR (Fourier transform infrared spectroscopy). And their catalytic performances were evaluated and investigated by transesterification of waste oil with methanol. The results showed that the catalyst containing 4% Ce and calcined at 550°C displayed the highest production rate and the better reuse ability than the others. 63.5% yield of fatty acid methyl ester was achieved. An analysis of XRD patterns reveal that the incorporation of rare earth into tetragonal zirconia stabilizes the compound, and the calcination at 550°C increases the reactivity of the catalyst by producing a greater fraction of active tetragonal zirconia. It can be seen from the FT-IR spectra that superacids structures are formed in the catalysts and the acidity is strengthened remarkably and the activated centre of the catalyst were increasesed.

Efficient hydrolysis of cellulose into glucose over sulfonated polynaphthalene (SPN) and rapid determination of glucose using positive corona discharge ion mobility spectrometry

RSC Advances ◽  
2016 ◽  
Vol 6 (10) ◽  
pp. 7879-7885 ◽  
Author(s):  
Fariborz Atabaki ◽  
Ebrahim Abedini ◽  
Arash Shokrolahi
Keyword(s):  
Ion Mobility Spectrometry ◽  
Ion Mobility ◽  
Solid Acid ◽  
Rapid Determination ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Hydrolysis Of Cellulose ◽  
High Yields ◽  
Hydrolysis Of

Sulfonated polynaphthalene (SPN) was successfully developed as solid acid catalysts for the hydrolysis of cellulose into high yields of glucose.

scholarly journals Butane Isomerization as a Diagnostic Tool in the Rational Design of Solid Acid Catalysts

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1099
Author(s):  
Matthew E. Potter ◽  
Joshua J.M. Le Brocq ◽  
Alice E. Oakley ◽  
Evangeline B. McShane ◽  
Bart D. Vandegehuchte ◽  
...  
Keyword(s):  
Diagnostic Tool ◽  
Sulfated Zirconia ◽  
Rational Design ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Alternative Methods ◽  
Acid Catalysts ◽  
Butane Isomerization ◽  
Invaluable Tool ◽  
Sulfated Zirconia Catalysts

The growing demand for isobutane as a vital petrochemical feedstock and chemical intermediate has for many decades surpassed industrial outputs that can be supplied through liquified petroleum gases. Alternative methods to resource the isobutane market have been explored, primarily the isomerization of linear n-butane to the substituted isobutane. To date the isobutane market is valued at over 20 billion US dollars, enticing researchers to seek unique and novel catalytic materials to improve on current commercial practices. Two main classes of catalysts have dominated the butane isomerization literature in the last few decades; namely microporous zeolites and sulfated zirconia. Both have been widely researched for butane isomerization, to the point where key catalytic descriptors such as acidity, framework topology and metal doping are becoming well understood. While this provides new researchers with a roadmap for developing new materials, it is has also begun developing into an invaluable tool for diagnosing and understanding the effect of these individual descriptors on catalytic properties. In this review we explore the different factors that influence the active site behavior of particularly zeolites and sulfated zirconia catalysts towards understanding the use of butane isomerization as a diagnostic tool for solid-acid catalysts.

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