权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Preparation of Iron Ultra Fine Particles and its Application as Catalyst for Conversion of Organic Resources

铁超细颗粒的制备及其作为有机资源转化催化剂的应用

基本信息

批准号：
02453082
负责人：
NISHIYAMA Yoshiyuki
金额：
$ 3.58万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

(1) Preparation of Ultrafine Particles (UFP) In this project, utilization of waste acid from steel processing was aimed as the iron source. Acid or alkali was added to a ferric chloride solution to precipitate iron oxide, Fe_2O_3 or FeOOH. By controlling the concentration of the salt, precipitator, temperature, and time, monodispersed UFP's, 0.05 mum for FeOOH and O. l mum for Fe_2O_3 were obtained. The latter had a specific surface area of 3 m^2/g.(2) Size Classification of UFP A new method of size classification was proposed and tested, using the electropheresis. By adjusting the ionic strength and pH, the speed of phoresis was seen to depend on the size of the particles. This can be, applied for classification.(3) Catalytic Gasification of Coals As an application of UFP so obtained for conversion of resources, catalytic gasification of coals, especially brown coals was conducted. UFP's of 0.1 mum in particle size were not so effective. By precipitating UFP onto coal particles, catalytic gasification was found to proceed at fairly high rate.(4) Catalyst for CO_2 conversion with CH_4. The iron UPF was used to catalyze the reaction of C0_2 with CH_4 to produce CO and C_2 hydrocarbons. The UFP yielded higher conversion of C0_2 than usual iron oxide, thus verified the usefulness as CO_2 conversion catalyst.(5) New Catalyst Using UFP The iron UFP was impregnated with nickel in liquid phase, resulting a catalyst in which amorphaous nickel is finely dispersed over Fe_20_3 surface. The catalyst was found to serve as a hydrogenation in a stired bed reactor.

(1)超细粒子(UFP)的制备本项目以钢铁加工废酸为铁源。在三氯化铁溶液中加入酸或碱以沉淀氧化铁、三氧化二铁或氧化亚铁。通过控制盐的浓度、沉淀剂的浓度、温度和时间，得到了均匀分散的UFP，FeOOH为0.05um，Fe_2O_3为O.L um。后者的比表面积为3m^2/g。(2)UFP的粒度分类提出了一种新的粒度分类方法，并利用电泳法对其进行了验证。通过调节离子强度和pH，可以看出凝胶的速度取决于颗粒的大小。煤的催化气化作为一种应用UFP进行资源转化的方法，对煤，特别是褐煤进行了催化气化。粒度为0.1um的UFP效果不佳。将超细粒子沉淀到煤粒上，催化气化反应速度较快。(4)CO_2与CH_4转化催化剂。用铁UPF催化CO_2与CH_4反应生成CO和C_2烃。UFP对CO_2的转化率高于普通氧化铁，从而验证了其作为CO_2转化催化剂的有效性。(5)采用UFP的新型催化剂铁UFP在液相中浸渍了镍，得到了一种无相镍均匀分散在Fe_2O_3表面的催化剂。该催化剂被发现在搅拌床反应器中用作加氢反应。