Effect of active alkali and alkaline earth metals on physicochemical properties and gasification reactivity of co-pyrolysis char from coal blended with corn stalks

2021 ◽  
Vol 171 ◽  
pp. 1213-1223
Author(s):  
Xiye Chen ◽  
Li Liu ◽  
Linyao Zhang ◽  
Yan Zhao ◽  
Chang Xing ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Gasification Reactivity

Synthesis of chelated compounds of amino acids with metals

2021 ◽  
Author(s):  
A.A. Yamskikh ◽  
L.A. Ivanova
Keyword(s):  
Amino Acids ◽  
Physicochemical Properties ◽  
Alkaline Earth ◽  
Alkaline Earth Metals ◽  
Iron Copper ◽  
Copper Zinc ◽  
Glycine Synthesis

The article describes the reactions of glycine synthesis with alkaline, alkaline-earth and divalent 3-d metals, which were carried out during the experiment. Hydroxides or sulfates of lithium, magnesium, calcium, manganese, iron, copper, zinc, cobalt and sodium were used as reagents for the synthesis. The physicochemical properties of the obtained compounds were studied. Keywords: chelates, glycinates of alkaline and alkaline earth metals, glycinates of divalent 3-d metals.

scholarly journals Dealuminated Beta Zeolite Modified by Alkaline Earth Metals

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Karolina Chalupka ◽  
Renata Sadek ◽  
Laetitia Valentin ◽  
Yannick Millot ◽  
Christophe Calers ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metals ◽  
Beta Zeolite ◽  
Alkaline Earth Metal ◽  
Lewis Acidic Sites ◽  
Acidic Sites ◽  
Acidity And Basicity

Alkaline Earth metals (Mg, Sr, and Ca) were incorporated into the dealuminated mesoporous beta zeolite (DeAlBeta) by the two-step postsynthesis method. Physicochemical properties of both unmodified and alkaline Earth metal-modified DeAlBeta zeolite were characterized by XRD, DR UV-vis, FTIR, TPD of NH3 and CO2, NMR, and XPS. The dealumination of beta zeolite led to decrease of its acidity and basicity. The incorporation of alkaline Earth metals into the framework of dealuminated beta zeolite did not affect its structure. The modification of DeAlBeta with a small amount of alkaline Earth metals increases the number of acidic centers, which may be related to the formation of framework Mg (Ca or Sr) (II) Lewis acidic sites.

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