摘要
ＮＰ型催化剂在制造活性炭过程中，主要是发挥了氧化和催化的协同作用。红外分析表明，在ＮＰ催化剂的作用下，炭化过程中煤分子的芳香结构遭到破坏，形成三维无序的“乱层结构”，芳香环断裂并被氧化生成官能团，成为活化反应的活性点。钾化合物的存在，使得活化反应造孔的方向性加强，成孔速度加快。助催化剂Ｐ的存在，则强化了这些作用。使用ＮＰ催化剂，活性炭中孔径为０－４ ～０－６ｎｍ 的孔容占总孔容的８５％ ～９０ ％ 。此外，该催化剂还能转化煤中矿物质成为酸易溶物，使总脱灰率达到６６ ％ 以上。
NP- typed catalyst plays a combination role of catalysis - oxidation in the preparation of activated carbon- The FTIRresults show that the aromatic structure of the coal moleculeis destroyedin carbonization underthetreatmentofthe catalystandforms dis ordered structure- The aromatic ring is broken and is oxidized into functional groups which arethe reaction active sites- Potassium compounds in the catalystfavor the pore - forming orientation and increase the pore -forming rate- The enhancer Penhancesthe action- The pore size distribution ofthe resulted activated carbon fallsin a very narrow rnage in which the pore volume within 4 to 6 angstrom accountsfor about 85 ～90 % ofthe total pore vol ume- In addition ,the catalyst can transform the mineralin coal such as SiO2 , Al2O3into acid - dissolvable materials and lays a foundation forthe production of ultra -low ash coal - based activated carbon by acid - washing-
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1999年第5期389-393,共5页
Journal of Fuel Chemistry and Technology
关键词
活性炭
制造
催化
氧化
NP型
催化剂
煤
activated carbon ,preparation ,oxidation ,catalysis,transformation
