Characterization and methanol adsorption of walnut-shell activated carbon prepared by KOH activation

Walnut-shellactivated carbons(WSACs)were prepared by the KOH chemicalactivation.The effects of carbonization temperature,activation temperature,and ratio of KOH to chars on the pore development of WSACs were investigated.Fourier transform infrared spectroscopy(FTIR),X-ray powder diffraction(XRD),and scanning electron microscopy(SEM)were employed to characterize the microstructure and morphology of WSACs.Methanoladsorption performance onto the optimalWSAC and the coal-based AC were also investigated.The results show that the optimalpreparation conditions are a carbonization temperature of 700 ℃,an activation temperature of 700 ℃,and a mass ratio of 3.The BET surface area,the micropore volume,and the micropore volume percentage of the optimalWASC are 1636 m~2/g,0.641 cm~3/g and 81.97%,respectively.There are a lot of micropores and a certain amount of meso-and macropores.The characteristics of the amorphous state are identified.The results show that the optimalWSAC is favorable for methanoladsorption.The equilibrium adsorption capacity of the optimalWSAC is 248.02mg/g.It is shown that the equilibrium adsorption capacity of the optimalWSAC is almost equivalent to that of the common activated carbon.Therefore the optimalWSAC could be a potentialadsorbent for the solar energy adsorption refrigeration cycle.     

中软赛博OA系统

中软赛博公司是中软总公司下属的五个子公司之一,公司主要进行软件集成、软件开发、软件服务为企业提供全面解决方案.     

免费翻译工具中的全能王——谷歌金山词霸合作版

●金山词霸有史以来第一个完全免费的版本今年五月,金山软件与全球最大的搜索引擎公司谷歌(Google)联合推出品牌产品"谷歌金山词霸","谷歌金山词霸"于是就成了金山词霸十二年发展历程中     

做好优化让固态硬盘更长寿

随着硬件技术的不断发展,电脑的性能已经较以前有了翻天覆地的变化。但玩熟了的人都知道。机械硬盘已成为电脑性能的瓶颈,所以性能更好的固态硬盘就进入了人们的视线。随着这货价格降低,用的人也多了起来,不过另外一个问题就引起了人们关注．那就是固态硬盘的使用寿命。我们今天就来和大家来讨论一下,如何有效延长固态硬盘的使用寿命。     

高校图书馆思想政治教育职能的特点与发挥

浅析了高校图书馆思想政治教育职能的特点与对策，并就如何有效地履行这一职能以及履行这一职能的根本保证等方面阐明了作者的观点。     

Effect of rare earth addition on Cu-Fe/AC adsorbents for phosphine adsorption from yellow phosphorous tail gas

Phosphine(PH3) is a highly toxic air pollutant,commonly produced in phosphorous chemical industry.But it has received less research attention due to its handling difficultly.CO is the main content of the phosphorous chemical industry tail gas,the concentration of which is always more than 80 vol.%,and it can be the feed gas to produce various valuable products such as formate,oxalate,and methanol and so on.But,PH3 is one of the important barriers,which is harmful to the following chemical process.In order to make use of the tail gas,PH3 should be removed firstly,and CO should be covered in the whole purified procedure at the same time.In this work,the modified activated carbon(MAC) was used as the adsorbent to separate PH3 from the mixture tail gas.Series of MAC adsorbents were prepared for the adsorption of PH3,which loaded Cu-Fe and Ce(La),or separately.The PH3 adsorption capacities,chemical and physical properties of MAC were all investigated.The results showed that over 99% PH3 adsorption efficiency was achieved when used MAC adsorbents.The removal efficiency and PH3 adsorption capacity of the Cu-Fe-Ce/AC(20:1:0.4) were both much higher than those modified activated carbons.The maximum PH3 adsorption capacity was 71 mg of PH3/g of MAC on the Cu-Fe-Ce/AC,which were much higher than literature data using CuO only for adsorbing hydride gases.