scholarly journals Aerobic Oxidative Desulfurization of Liquid Fuel Catalyzed by P–Mo–V Heteropoly Acids in the Presence of Aldehyde

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 988
Author(s):  
Reem Ghubayra ◽  
Rachel Hindle ◽  
Rana Yahya ◽  
Elena F. Kozhevnikova ◽  
Ivan V. Kozhevnikov
Keyword(s):  
Liquid Fuel ◽  
Heterogeneous Catalysts ◽  
Oxidative Desulfurization ◽  
Ambient Air ◽  
Air Pressure ◽  
Heteropoly Acids ◽  
Chain Mechanism ◽  
Radical Scavengers ◽  
Radical Chain ◽  
Model Liquid

Aerobic oxidative desulfurization (ODS) of model liquid fuel (dodecane spiked with dibenzothiophene (DBT)) was carried out in the presence of bulk and supported Keggin-type heteropoly acids H3+nPMo12-nVnO40 (HPA-n, n = 0–3) as heterogeneous catalysts and benzaldehyde as a sacrificial reductant. In the presence of bulk H4PMo11VO40 (HPA-1), 100% of DBT was removed from fuel (converted to DBT sulfone) at 60 °C and ambient air pressure. Multiple catalyst reuse without loss of activity was demonstrated. The ODS reaction was strongly inhibited by radical scavengers. An unbranched radical chain mechanism was proposed.

Heteropoly Acids as Heterogeneous Catalysts for Thioacetalization and Transthioacetalization Reactions

Synthesis ◽  
2004 ◽  
Vol 2002 (01) ◽  
Author(s):  
Habib Firouzabadi ◽  
Nasser Iranpoor ◽  
Kamal Amani
Keyword(s):  
Heterogeneous Catalysts ◽  
Heteropoly Acids

scholarly journals Extractive Deep Desulfurization of Liquid Fuels Using Lewis-Based Ionic Liquids

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Swapnil A. Dharaskar ◽  
Kailas L. Wasewar ◽  
Mahesh N. Varma ◽  
Diwakar Z. Shende
Keyword(s):  
Ionic Liquids ◽  
Liquid Fuel ◽  
Extraction Process ◽  
Operating Conditions ◽  
Liquid Fuels ◽  
Green Solvents ◽  
Model Liquid ◽  
New Class ◽  
Deep Desulfurization ◽  
Desulfurization Efficiency

A new class of green solvents, known as ionic liquids (ILs), has recently been the subject of intensive research on the extractive desulfurization of liquid fuels because of the limitation of traditional hydrodesulfurization method. In present work, eleven Lewis acid ionic liquids were synthesized and employed as promising extractants for deep desulfurization of the liquid fuel containing dibenzothiophene (DBT) to test the desulfurization efficiency. [Bmim]Cl/FeCl3was the most promising ionic liquid and performed the best among studied ionic liquids under the same operating conditions. It can remove dibenzothiophene from the model liquid fuel in the single-stage extraction process with the maximum desulfurization efficiency of 75.6%. It was also found that [Bmim]Cl/FeCl3may be reused without regeneration with considerable extraction efficiency of 47.3%. Huge saving on energy can be achieved if we make use of this ionic liquids behavior in process design, instead of regenerating ionic liquids after every time of extraction.

scholarly journals Catalytic Conversion of Oil and Gas Residue to Liquid Fuel Using Heterogeneous Catalysts

2021 ◽  
Author(s):  
Pusparatu ◽  
R.Y. Perry Burhan ◽  
Sylvia Yusnica ◽  
Oksil Venriza
Keyword(s):  
Liquid Fuel ◽  
Heterogeneous Catalysts ◽  
Oil And Gas ◽  
Catalytic Conversion

Effects of Ambient Air Pressure on Femtosecond Laser Induced Periodic Ripple Structure on Chromium Films

2018 ◽  
Vol 47 (7) ◽  
pp. 714001
Author(s):  
刘琦 LIU Qi ◽  
张楠 ZHANG Nan ◽  
杨建军 YANG Jian-jun
Keyword(s):  
Femtosecond Laser ◽  
Ambient Air ◽  
Air Pressure ◽  
Ripple Structure ◽  
Chromium Films
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