A Direct Method for the Efficient Synthesis of Benzylidene Acetal at Room Temperature

2019 ◽  
Vol 2019 (7) ◽  
pp. 1548-1552 ◽  
Author(s):  
Narra Rajashekar Reddy ◽  
Rashmi Kumar ◽  
Sundarababu Baskaran
Keyword(s):  
Room Temperature ◽  
Direct Method ◽  
Efficient Synthesis ◽  
A Direct Method

Transmission spectra of silver intercalated 2H-TaS2 and 1T-TiS2

1983 ◽  
Vol 61 (7) ◽  
pp. 965-970 ◽  
Author(s):  
G. A. Scholz ◽  
R. F. Frindt
Keyword(s):  
Charge Transfer ◽  
Energy Range ◽  
Conduction Band ◽  
Room Temperature ◽  
Direct Method ◽  
Silver Ions ◽  
Silver Cation ◽  
Band Model ◽  
Transmission Spectra ◽  
A Direct Method

The room temperature transmission spectra of Agx TaS2 and Agx TiS2 have been measured in the energy range from about 1.3 to 2.8 eV for various values of x. A rigid band model, where charge transfer from the silver cation to the lowest d conduction band of the host macro-anion occurs, can explain the changes in the spectra. These changes in the transmission spectra provide a direct method for monitoring staging and the intercalation rate of the silver ions.

scholarly journals A direct method for the decontamination of a fly ash amended wet soil, artificially polluted with dioxins

2012 ◽  
Vol 10 (5) ◽  
pp. 1547-1555 ◽  
Author(s):  
Alina Simion ◽  
Mitsunori Kakeda ◽  
Naoyoshi Egashira ◽  
Yoshiharu Mitoma ◽  
Cristian Simion
Keyword(s):  
Fly Ash ◽  
Moisture Content ◽  
Polychlorinated Biphenyls ◽  
Room Temperature ◽  
Direct Method ◽  
Soil Samples ◽  
Toxic Equivalent ◽  
Direct Treatment ◽  
Coplanar Polychlorinated Biphenyls ◽  
A Direct Method

AbstractWe report hereby the first method of direct treatment of a wet soil containing toxic polychloroderivatives. Using a system with metallic Ca and 5% Rh fixed on charcoal in methanol, soil samples artificially polluted with fly ash containing polychloro-dibenzodioxins (PCDDs), polychloro-dibenzofurans (PCDFs) and coplanar polychlorinated biphenyls (co-PCBs), and having 69.2% to 84.6% moisture content, were successfully treated and decontaminated. This treatment afforded excellent hydrodechlorination yields for the 29 most toxic congeners of PCDDs, PCDFs and PCBs (98.3% degradation yield based on toxic equivalent quotient — or TEQ) after a 24 h treatment, at room temperature.

scholarly journals Plastic waste to fuels by hydrocracking at mild conditions

2021 ◽  
Vol 7 (17) ◽  
pp. eabf8283
Author(s):  
Sibao Liu ◽  
Pavel A. Kots ◽  
Brandon C. Vance ◽  
Andrew Danielson ◽  
Dionisios G. Vlachos
Keyword(s):  
Direct Method ◽  
Acid Sites ◽  
Liquid Fuels ◽  
High Yield ◽  
Tandem Catalysis ◽  
Hy Zeolite ◽  
Environmental Threat ◽  
Single Use ◽  
Initial Activation ◽  
A Direct Method

Single-use plastics impose an enormous environmental threat, but their recycling, especially of polyolefins, has been proven challenging. We report a direct method to selectively convert polyolefins to branched, liquid fuels including diesel, jet, and gasoline-range hydrocarbons, with high yield up to 85% over Pt/WO3/ZrO2 and HY zeolite in hydrogen at temperatures as low as 225°C. The process proceeds via tandem catalysis with initial activation of the polymer primarily over Pt, with subsequent cracking over the acid sites of WO3/ZrO2 and HY zeolite, isomerization over WO3/ZrO2 sites, and hydrogenation of olefin intermediates over Pt. The process can be tuned to convert different common plastic wastes, including low- and high-density polyethylene, polypropylene, polystyrene, everyday polyethylene bottles and bags, and composite plastics to desirable fuels and light lubricants.

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