辽宁石油化工大学学报
遼寧石油化工大學學報
료녕석유화공대학학보
JOURNAL OF LIAONING UNIVERSITY OF PETROLEUM & CHEMICAL TECHNOLOGY
2014年
2期
24-28
,共5页
杨鹏冲%韩易潼%孟秀红%王海彦%赵伟林%吉豪杰
楊鵬遲%韓易潼%孟秀紅%王海彥%趙偉林%吉豪傑
양붕충%한역동%맹수홍%왕해언%조위림%길호걸
正交实验%氧化铝%堆积密度%孔容%N2吸附-脱附
正交實驗%氧化鋁%堆積密度%孔容%N2吸附-脫附
정교실험%양화려%퇴적밀도%공용%N2흡부-탈부
Orthogonal experiment%γ-alumina%Bulk density%Pore volume%N2 adsorption-desorption isotherm
以硫酸铝为铝源、碳酸氢铵为沉淀剂,采用分步老化法,使用 L9(34)正交实验考察了碳酸氢铵物质的量浓度、反应温度、pH 和n(HCO-3)/n(Al3+)等因素对制备γ-Al2 O3的影响,并对所得 Al2 O3进行了 N2物理吸附表征和堆积密度测量,对 Y5样品进行了 X 射线衍射和电镜扫描,由正交实验结果分析得出温度和 pH 对γ-Al2 O3的结构影响很大。大孔容氧化铝的制备最佳条件为:反应温度为75℃,pH 为8.5,碳酸氢铵物质的量浓度为2 mol/L,n(HCO-3)/n(Al3+)为0.75。其中,样品 Y5孔容达2.02 mL/g,具有双峰孔分布,粒子呈纤维状,大小均匀,粒径为1μm左右。
以硫痠鋁為鋁源、碳痠氫銨為沉澱劑,採用分步老化法,使用 L9(34)正交實驗攷察瞭碳痠氫銨物質的量濃度、反應溫度、pH 和n(HCO-3)/n(Al3+)等因素對製備γ-Al2 O3的影響,併對所得 Al2 O3進行瞭 N2物理吸附錶徵和堆積密度測量,對 Y5樣品進行瞭 X 射線衍射和電鏡掃描,由正交實驗結果分析得齣溫度和 pH 對γ-Al2 O3的結構影響很大。大孔容氧化鋁的製備最佳條件為:反應溫度為75℃,pH 為8.5,碳痠氫銨物質的量濃度為2 mol/L,n(HCO-3)/n(Al3+)為0.75。其中,樣品 Y5孔容達2.02 mL/g,具有雙峰孔分佈,粒子呈纖維狀,大小均勻,粒徑為1μm左右。
이류산려위려원、탄산경안위침정제,채용분보노화법,사용 L9(34)정교실험고찰료탄산경안물질적량농도、반응온도、pH 화n(HCO-3)/n(Al3+)등인소대제비γ-Al2 O3적영향,병대소득 Al2 O3진행료 N2물리흡부표정화퇴적밀도측량,대 Y5양품진행료 X 사선연사화전경소묘,유정교실험결과분석득출온도화 pH 대γ-Al2 O3적결구영향흔대。대공용양화려적제비최가조건위:반응온도위75℃,pH 위8.5,탄산경안물질적량농도위2 mol/L,n(HCO-3)/n(Al3+)위0.75。기중,양품 Y5공용체2.02 mL/g,구유쌍봉공분포,입자정섬유상,대소균균,립경위1μm좌우。
Alumina were prepared with aluminium sulfate as aluminium source,ammonium bicarbonate as precipitant,using substep aging method and L9 (34 ) orthogonal table.Factors inculding ammonium bicarbonate concentration, reaction temperature,pH and n(HCO-3 )/n(Al3+)were studied.The alumina were characterized by the N2 physisorption and bulk density measurement,XRD and SEM as well.After orthogonal analysis,reaction temperature and pH have significant effect on textile properties ofγ-Al2 O3 .Optimum preparation conditions were determined by macropore formation,and they were as follows:reaction temperature 75 ℃,pH 8.5,the concentration of ammonium bicarbonate 2 mol/L,n(HCO-3 )/n(Al3+)ratio 0.75.Besides that,Y5 has big pore volume up to 2.02 mL/g,bimodal pore distribution and fibrous particles which have uniform size around 1μm.