Reinvestigation of the mixed-metal periodates M′MIO6(M′= alkali metal, M = Ge, Sn, Pb)

1993 ◽  
Vol 3 (5) ◽  
pp. 447-451 ◽  
Author(s):  
David B. Currie ◽  
William Levason ◽  
Richard D. Oldroyd ◽  
Mark T. Weller
Keyword(s):  
Alkali Metal ◽  
Mixed Metal

Do Alkali Metal Anions (M−) Exist in Zeolite A?

1996 ◽  
Vol 431 ◽  
Author(s):  
P. D. Barker ◽  
P. A. Anderson ◽  
R. Dupree ◽  
S. Kitchin ◽  
P. P. Edwards ◽  
...  
Keyword(s):  
Solid State ◽  
Neutron Diffraction ◽  
Alkali Metal ◽  
Mas Nmr ◽  
Zeolite A ◽  
Nmr Studies ◽  
Mixed Metal ◽  
Powder Neutron Diffraction ◽  
Wide Range ◽  
Sodium And Potassium

AbstractRecent NMR studies by Nakayama et al. on sodium zeolite A saturated with potassium metal have implied the presence of the anionic Na− species. This, if confirmed, would represent the first observation in a zeolite and opens up a wide range of possibilities for mixed metal zeolitic systems. We report the results of a number of metal combinations, using both sodium and potassium forms of zeolite A as hosts, studied by ESR, solid state MAS-NMR and powder neutron diffraction.

scholarly journals s-Block cooperative catalysis: alkali metal magnesiate-catalysed cyclisation of alkynols

2019 ◽  
Vol 10 (22) ◽  
pp. 5821-5831 ◽  
Author(s):  
Michael Fairley ◽  
Laia Davin ◽  
Alberto Hernán-Gómez ◽  
Joaquín García-Álvarez ◽  
Charles T. O'Hara ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Mixed Metal ◽  
Cooperative Catalysis

Through mixed metal cooperativity, alkali metal magnesiates efficiently catalyse the cyclisation of alkynols.

scholarly journals Diverse outcomes of CO2 fixation using alkali metal amides including formation of a heterobimetallic lithium–sodium carbamato-anhydride via lithium–sodium bis-hexamethyldisilazide

2019 ◽  
Vol 55 (10) ◽  
pp. 1478-1481 ◽  
Author(s):  
Richard M. Gauld ◽  
Alan R. Kennedy ◽  
Ross McLellan ◽  
Jim Barker ◽  
Jacqueline Reid ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Co2 Fixation ◽  
Mixed Metal ◽  
Metal Amides ◽  
Synergistic Activation

Mixed-metal synergistic activation of CO2 leads to a crystalline mixed-metal carbamato-anhydride polymer.

Modeling fine particles and alkali metal compound behavior in a kraft recovery boiler

TAPPI Journal ◽  
2012 ◽  
Vol 11 (7) ◽  
pp. 9-14 ◽  
Author(s):  
AINO LEPPÄNEN ◽  
ERKKI VÄLIMÄKI ◽  
ANTTI OKSANEN
Keyword(s):  
Alkali Metal ◽  
Computational Models ◽  
Fine Particles ◽  
Black Liquor ◽  
Melting Behavior ◽  
Metal Compound ◽  
Effect Of Temperature ◽  
Particle Model ◽  
Boiler Furnace ◽  
Recovery Boiler

Under certain conditions, ash in black liquor forms a locally corrosive environment in a kraft recovery boiler. The ash also might cause efficiency losses and even boiler shutdown because of plugging of the flue gas passages. The most troublesome compounds in a fuel such as black liquor are potassium and chlorine because they change the melting behavior of the ash. Fouling and corrosion of the kraft recovery boiler have been researched extensively, but few computational models have been developed to deal with the subject. This report describes a computational fluid dynamics-based method for modeling the reactions between alkali metal compounds and for the formation of fine fume particles in a kraft recovery boiler furnace. The modeling method is developed from ANSYS/FLUENT software and its Fine Particle Model extension. We used the method to examine gaseous alkali metal compound and fine fume particle distributions in a kraft recovery boiler furnace. The effect of temperature and the boiler design on these variables, for example, can be predicted with the model. We also present some preliminary results obtained with the model. When the model is developed further, it can be extended to the superheater area of the kraft recovery boiler. This will give new insight into the variables that increase or decrease fouling and corrosion

Sign in / Sign up

Export Citation Format

Share Document