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Белецкая, Марина Геннадьевна; Богданович, Николай Иванович (2013)
Publisher: Altai State University
Journal: Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
Languages: Russian
Types: Article
Subjects: planning experiments, adsorbent, activated carbon, thermo-chemical activation, pyrolysis, lignin, планированный эксперимент, углеродные адсорбенты, активный уголь, термохимическая активация, пиролиз, гидролизный лигнин
The results are shown studies on the use of hydrolytic lignin as a raw material for the production of carbon adsorbents. As method of activation of hydrolytic lignin was chosen thermochemical using sodium hydroxide as an activating agent. During experiment it was required to find out influence of condition parameters on an yield and properties of the received active coal. Synthesis of adsorbents was carried out on central composite rotatabelny uniforms plans of the second order for three variables varying at 5 levels. As changing the parameters there were temperature of preprocessings and pyrolysis, and also a dosage of the activating agent. For the samples of active carbon adsorption activity was investigated in three adsorbates: methylene blue (MG), iodine, hexane. Based on output parameters coefficients of the equations of regression were calculated and the assessment of their importance is carried out. By the absolute value and sign of the coefficients can be made at the conclusion of the power of the influence of factors, bending their study space. The influence of operating parameters on the yield and sorption activity of the obtained coal was studied by constructing of graphic dependences – response surfaces. As a result of analysis of the received data a conclusion was done about efficiency of in-use method for the synthesis of adsorbents, because obtained active coal has developed porous structure
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