Demineralization and Desulfurization of High-Sulfur Assam Coal with Alkali Treatment

2003 ◽  
Vol 17 (3) ◽  
pp. 559-564 ◽  
Author(s):  
Samit Mukherjee
Keyword(s):  
Alkali Treatment ◽  
Assam Coal

Effects of alkali treatment on ash and sulphur removal from Assam coal

2004 ◽  
Vol 85 (2-3) ◽  
pp. 93-101 ◽  
Author(s):  
Samit Mukherjee ◽  
P.C Borthakur
Keyword(s):  
Alkali Treatment ◽  
Assam Coal ◽  
Sulphur Removal

Kinetic Adsorption of Humic Acids Mixture Obtained from Microalgae on Exfoliated Graphite Nanoplatelets

2018 ◽  
Vol 69 (1) ◽  
pp. 191-195
Author(s):  
Elena Radu ◽  
Elena Emilia Oprescu ◽  
Cristina Emanuela Enascuta ◽  
Catalina Calin ◽  
Rusandica Stoica ◽  
...  
Keyword(s):  
Humic Acid ◽  
Humic Acids ◽  
Alkali Treatment ◽  
Exfoliated Graphite ◽  
Acid Mixture ◽  
Acidic Ph ◽  
Graphite Nanoplatelets ◽  
Mixture Concentration ◽  
Ft Ir ◽  
Exfoliated Graphite Nanoplatelets

The dehydration of polysaccharides fraction in the presence of acid catalysts, is a chemical process in which results as secondary product humic matter. In our work, the humic acid mixture was for the first time based on our knowledge extracted from defatted microalgae biomass rich in polysaccharides by standard alkali treatment, followed by precipitation at acidic pH. The dried humic acid mixture has been characterized using infrared spectroscopic measurements (FT-IR). Exfoliated graphite nanoplatelets (xGnP) were used as new adsorbents for this type of humic acids mixture, their adsorption being investigated. The effect of several parameters such as: contact time, concentration of humic acid mixture, concentration of xGnP, temperature and pH of the solutions were studied. The process of adsorption took place with good results, in the following conditions: at a concentration of humic acid mixture of 18.6 mg L-1, an xGnP amount of 0.01 mg in 25 mL of solution, at a temperature of 25 �� and at acidic pH values, in aqueous solution.

Influence of alkali treatment on flax fiber for use as reinforcements in polylactide stereocomplex composites

2015 ◽  
Vol 55 (11) ◽  
pp. 2553-2558 ◽  
Author(s):  
Huihui Zhang ◽  
Ruihao Ming ◽  
Gesheng Yang ◽  
Yuzeng Li ◽  
Qiao Li ◽  
...  
Keyword(s):  
Alkali Treatment ◽  
Flax Fiber

Green, efficient extraction of bamboo hemicellulose using freeze-thaw assisted alkali treatment

2021 ◽  
Vol 333 ◽  
pp. 125107
Author(s):  
Jing Li ◽  
Zhaomeng Liu ◽  
Chengqi Feng ◽  
Xiaoying Liu ◽  
Fangyu Qin ◽  
...  
Keyword(s):  
Alkali Treatment ◽  
Freeze Thaw ◽  
Efficient Extraction
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