scholarly journals Addition Compounds of Boron Nitride with Alkali Metals and Their Catalytic Activity

1970 ◽  
Vol 43 (1) ◽  
pp. 287-288 ◽  
Author(s):  
Chie Mugiya ◽  
Noriko Ohigashi ◽  
Yoshihiro Mori ◽  
Hiroo Inokuchi
Keyword(s):  
Catalytic Activity ◽  
Boron Nitride ◽  
Alkali Metals

The synthesis and catalytic activity of polymeric compounds containing alkali metals

1975 ◽  
Vol 17 (7) ◽  
pp. 1636-1644 ◽  
Author(s):  
V.S. Glukhovskoi ◽  
Yu.A. Litvin ◽  
I.F. Gainulin
Keyword(s):  
Catalytic Activity ◽  
Alkali Metals ◽  
Polymeric Compounds

Role of Catalyst in Solid Biomass Gasification

2016 ◽  
Author(s):  
K. G. Burra ◽  
A. K. Gupta
Keyword(s):  
Catalytic Activity ◽  
Alkali Metals ◽  
Total Yield ◽  
Value Added ◽  
Clean Energy ◽  
Product Yield ◽  
Energy Yield ◽  
Gaseous Species ◽  
Transitional Metals ◽  
Solid Biomass

Energy recovery from biomass is of pinnacle importance for renewable and sustainable energy development. Gasification techniques offer efficient and effective transformation of solid biomass into gas/liquid fuels and value added materials. This technique offers clean energy production with improved efficiency compared to other transformation techniques. Catalysts offer improved reaction efficiency and product yield. However, a robust catalyst for efficient biomass conversion to fuel gases requires close examination. Transitional metals, being inert compared to alkali metals, have shown good catalytic activity in reformation reactions, such as, high temperature and low temperature water-gas shift reactions in ammonia plants with good heat conductivity and catalytic activity. In this study catalytic conversion of pine wood chips using dry (CO2) gasification is investigated. The catalytic effects of CuO/Al2O3-SiO2 (made by wetness impregnation) on the rate of gasification, along with the gaseous species evolved during the gasification at different temperatures (700°C to 900°C) using CO2 are investigated in a semi-batch type reactor. The H2/CO ratio in the syngas and the temporal evolution of various gases evolved, their total yield, and the energy yield are quantified from the analysis of gases evolved. The results reveal significant enhancement in H2 yield and production rate along with selective dry reformation of CH4, while the effect on CO yields were unaffected. Improved yields of H2 and CH4 but no change in CO suggest the catalytic activity of CuO in enhancing the formation of high molecular weight hydrocarbons.

A polymer analog of dimethyl sulfoxide: Catalytic activity of crosslinked polymeric sulfoxides in nucleophilic reactions under the conditions of three-phase catalysis

1984 ◽  
Vol 49 (9) ◽  
pp. 2096-2102 ◽  
Author(s):  
Václav Janout ◽  
Hana Hrudková ◽  
Pavel Čefelín
Keyword(s):  
Catalytic Activity ◽  
Alkali Metals ◽  
Crosslinking Agent ◽  
Substitution Reactions ◽  
Alkyl Bromides ◽  
Three Phase ◽  
Polystyrene Matrix ◽  
Crosslinked Polystyrene ◽  
Solid Liquid ◽  
Matrix Extension

An investigation was made of the catalytic activity of polymeric sulfoxides, P-(CH2SOCH2-)n-R' where P is the crosslinked polystyrene matrix (divinylbenzene as the crosslinking agent), R is H or CH3, and n is 1, 2, or 3, in nucleophilic substitution reactions between alkyl bromides and phenoxides, iodides, thiocyanates and cyanides of alkali metals under the conditions of liquid-solid-liquid (L-S-L) three-phase catalysis (TC). The effect of the structure of polymeric sulfoxides on their activity under the conditions of TC was studied; the strongest catalytic activity was found with polymeric sulfoxides having the optimal ratio between the functional groups and hydrophobic polymer matrix. Extension of the pendant sulfoxide chain has no pronounced effect of the catalytic activity of polymers.

ChemInform Abstract: CATALYTIC ACTIVITY OF SILVER AND GOLD METALS DOPED WITH ALKALI METALS

1977 ◽  
Vol 8 (32) ◽  
pp. no-no
Author(s):  
S. HAYASHI ◽  
M. SOMA ◽  
T. KONDOW ◽  
T. ONISHI ◽  
K. TAMARU
Keyword(s):  
Catalytic Activity ◽  
Alkali Metals

scholarly journals Effects of Alkali Metals on Nickel/Alumina Catalyzed Ethanol Dry Reforming

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 260
Author(s):  
Se-Won Park ◽  
Dongseok Lee ◽  
Seung-Ik Kim ◽  
Young Jin Kim ◽  
Ji Hoon Park ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
Alkali Metals ◽  
Coke Formation ◽  
Nickel Catalysts ◽  
Dry Reforming ◽  
Carbon Utilization ◽  
Transmission Electron ◽  
Metal Additives ◽  
Sodium And Potassium

Although ethanol dry reforming is an attractive carbon utilization technology, problems of severe coke formation and low catalytic activity should be solved for realization of the technology. We demonstrate the effects of alkali metal additives (lithium, sodium, and potassium) on nickel catalyzed ethanol dry reforming. Potassium doped nickel catalyst (Ni/K2O-Al2O3) showed enhanced catalytic activity and durability in ethanol dry reforming. Thermogravimetric analysis (TGA) showed that Ni/K2O-Al2O3 had a high resistance to coke formation. The amounts of coke formed on Ni/K2O-Al2O3 were 1/3 lower than the amounts of coke formed on Ni/Al2O3. The total coke quantities were closely correlated to the number of basic sites of the nickel catalysts. Raman spectroscopy and transmission electron microscopy analyses revealed that the alkali metals control the coke formation on the catalysts.

Effect of Boron Nitride Support on Catalytic Activity of Ru-Ba/BN for Ammonia Synthesis

2010 ◽  
Vol 31 (6) ◽  
pp. 677-682
Author(s):  
Chunfeng XU ◽  
Liang OUYANG ◽  
Jia ZHANG ◽  
Bin ZHOU ◽  
Ying LI ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Boron Nitride ◽  
Ammonia Synthesis

scholarly journals Metal‐free graphene/boron nitride heterointerface for CO 2 reduction: Surface curvature controls catalytic activity and selectivity

EcoMat ◽  
2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Xin Mao ◽  
Dimuthu Wijethunge ◽  
Lei Zhang ◽  
Sufan Wang ◽  
Cheng Yan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Boron Nitride ◽  
Surface Curvature ◽  
Metal Free ◽  
Free Graphene
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