林业工程学报2016，Vol.1Issue(5)：65-70,6.DOI:10.13360/j.issn.2096-1359.2016.05.012
木糖脱色用活性炭的成型工艺
Research on molding process of activated carbon for xylose decoloring
摘要
Abstract
Activated carbon is a kind of important functional porous material with large specific surface area and pore structure. Activated carbon is widely used on industrial scale as an adsorbent mainly for the purification/separation of liq⁃uids and gases or as catalyst and catalyst support. Activated carbon is commonly prepared by the well⁃known methods of physical activation or chemical activation. In the chemical method, H3 PO4 is the most widely used impregnation agent. There are some advantages of powder activated carbon, such as large surface area and adsorption efficiency, quick re⁃sponse filter and so on. But the application of activated carbon in the sugar industry exists some drawbacks, such as seri⁃ous environmental pollution, difficult to recycle and regeneration. So the application of molded activated carbon has ob⁃tained wide attention. In this study, activated carbon was molded for xylose bleaching. The optimum molding process was achieved when the ratio of toner to composite binder to water was 1∶0�4∶2�5;the mass ratio of component A to compo⁃nent B in the adhesive was 1∶4;the molded product was dried at 150℃ with the measured intensity of 87%. The opti⁃mum bleaching performance was obtained at 80 ℃, and the decoloration rate was 75. 36%. At room temperature, the samples immersed in acid or alkali were barely damaged. When boiled in acid for 5 min, the surface of the particle sur⁃face came off slightly, but the overall structure was not destroyed, indicating their strong acid and alkali resistance. Oth⁃er relevant properties of the molded activated carbon were:the iodine adsorption value was 985 mg/g;the methylene blue adsorption value was 225 mg/g;the caramel decoloration rate was 60%;the specific surface area of the molded activated carbon was 1 438�56 m2/g. After adsorption saturation, it was better to regenerate it with diluted hydrochloric acid.关键词
成型活性炭/黏结剂/木糖脱色/成型工艺Key words
molded activation carbon/adhesive/xylose decoloration/molding process分类
化学化工引用本文复制引用
马欢欢,周秉亮,邢美腾,周建斌..木糖脱色用活性炭的成型工艺[J].林业工程学报,2016,1(5):65-70,6.基金项目
江苏省科技厅产学研联合创新资金---前瞻性联合研究（BY2014006－01）；林业科学技术推广项目（［2014］40）；国家自然科学基金（51406089）；江苏省自然基金面上项目（BK20151521）。 （）
