Design of experiments (DOE) for adsorptive desulfurization (ADS) of liquid fuels – A review

2021 ◽  
Author(s):  
Niteen R. Yeole ◽  
Vijay Parthasarthy
Keyword(s):  
Design Of Experiments ◽  
Liquid Fuels ◽  
Adsorptive Desulfurization

Use of Retorted Shale as Sulfur Adsorbent

2018 ◽  
Vol 930 ◽  
pp. 562-567
Author(s):  
Rodolfo Luiz Bezerra de Araújo Medeiros ◽  
Maria de Fátima Dantas e Silva ◽  
Rodrigo César Santiago ◽  
Gilvan Pereira de Figueredo ◽  
Heloísa Pimenta de Macedo ◽  
...  
Keyword(s):  
Acid Leaching ◽  
Gas Production ◽  
Liquid Fuels ◽  
Test Results ◽  
X Ray Diffraction ◽  
Adsorptive Desulfurization ◽  
Wet Impregnation ◽  
X Ray ◽  
Chemically Modified ◽  
Alternative Material

The aim of this work is to use a residue from shale gas production, known as retorted shale (RS), as an alternative material for processes of sulfur adsorptive desulfurization in liquid fuels such as gasoline or diesel. Therefore, retorted shale samples were chemically modified. Two methods were applied: acid leaching and impregnation. The first method (RS-HCl) was an acid treatment with HCl solution (3M) in proportion of 1.5: 10. The second method (RS-Fe) was a wet impregnation of 20%wt. of Fe followed by calcination at 700°C for 2 h. The adsorbents were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The adsorption tests were performed using a solution of n-heptane and thiophene to simulate a fuel with an initial concentration of 500 ppm of sulfur. The results showed that both methods significantly altered the structure of the retorted shale, mainly the amount of Fe2O3. The adsorption test results indicated that the adsorbents prepared can remove up to 90% of the sulfur present.

Effects of oxygenates and moisture on adsorptive desulfurization of liquid fuels with Cu(I)Y zeolite

2006 ◽  
Vol 116 (4) ◽  
pp. 512-518 ◽  
Author(s):  
Yingwei Li ◽  
Frances H. Yang ◽  
Gongshin Qi ◽  
Ralph T. Yang
Keyword(s):  
Liquid Fuels ◽  
Y Zeolite ◽  
Adsorptive Desulfurization

Adsorptive Desulfurization of Liquid Fuels at Elevated Temperatures Using Metal Exchanged Zeolite Y

2019 ◽  
Vol 58 (42) ◽  
pp. 19623-19632 ◽  
Author(s):  
Priscilla Dias da Silva ◽  
Samantha K. Samaniego Andrade ◽  
Kyriacos Zygourakis ◽  
Michael S. Wong
Keyword(s):  
Elevated Temperatures ◽  
Zeolite Y ◽  
Liquid Fuels ◽  
Adsorptive Desulfurization

scholarly journals Comparison of Different Hydrotalcite Solid Adsorbents on Adsorptive Desulfurization of Liquid Fuel Oil

Technologies ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 22
Author(s):  
Mozammel Mazumder ◽  
Rajib Das ◽  
Md Symon Jahan Sajib ◽  
Andrew Jewel Gomes ◽  
Mohammad Islam ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Internal Combustion Engines ◽  
Fuel Oil ◽  
Liquid Fuels ◽  
Precipitation Method ◽  
Adsorptive Desulfurization ◽  
X Ray ◽  
Solid Adsorbents ◽  
Strict Requirement ◽  
Co Precipitation

With increasingly stringent environmental regulations, desulfurization for gasoline oil production has become an important issue. Nowadays, desulfurization technologies have become an integral part of environmental catalysis studies. It is also important for processing of fuel for fuel-cells, which has a strict requirement for sulfur content for internal combustion engines. In this study, we focused on the preparation and characterization of magnesium hydroxide/aluminum supported NiO, ZnO, ZrO2, NiO-ZnO, NiO-ZrO2, adsorbents for the adsorptive desulfurization of liquid fuels. These hydrotalcite adsorbents were prepared by co-precipitation method and used for adsorption of thiophene (in n-pentane, as model fuel) and dibenzothiophene at ambient temperature and pressure. The physicochemical behaviors of the fresh adsorbents such as structure, composition, and bonding modes were determined using X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR), energy dispersive X-Ray analysis (EDAX), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA). The sulfur concentration in the mixture (thiophene and n-pentane) was measured by UV-Vis spectrophotometry. The percentages of thiophene removal and the adsorption capacity (mg of sulfur per g of adsorbent) of the five adsorbents were compared. The adsorption performance confirmed that NiO-ZrO2 and NiO-ZnO adsorbents are more efficient in removing thiophene/dibenzothiophene than that of three other adsorbents. The qualitative studies using XPS confirmed the efficient adsorption nature of modified hydrotalcite adsorbents on dibenzothiophene.

Microscopic versus process parameters in heavy-oil upgrading

1992 ◽  
Vol 50 (1) ◽  
pp. 366-367
Author(s):  
V.A. Munoz ◽  
R.J. Mikula ◽  
C. Payette ◽  
W.W. Lam
Keyword(s):  
Molecular Weight ◽  
Liquid Fuels ◽  
Chemical Components ◽  
Heavy Oils ◽  
Synthetic Fuels ◽  
High Hydrogen ◽  
Optical Texture ◽  
Polar Groups ◽  
Anisotropic Character ◽  
Planar Molecules

The transformation of high molecular weight components present in heavy oils into useable liquid fuels requires their decomposition by means of a variety of processes. The low molecular weight species produced recombine under controlled conditions to generate synthetic fuels. However, an important fraction undergo further recombination into higher molecular weight components, leading to the formation of coke. The optical texture of the coke can be related to its originating components. Those with high sulfur and oxygen content tend to produce cokes with small optical texture or fine mosaic, whereas compounds with relatively high hydrogen content are likely to produce large optical texture or domains. In addition, the structure of the parent chemical components, planar or nonplanar, determines the isotropic or anisotropic character of the coke. Planar molecules have a tendency to align in an approximately parallel arrangement to initiate the formation of the nematic mesophase leading to the formation of anisotropic coke. Nonplanar highly alkylated compounds and/or those rich in polar groups form isotropic coke. The aliphatic branches produce steric hindrance to alignment, whereas the polar groups participate in cross-linking reactions.

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