Results 51 to 60 of about 1,349 (126)

Researchs on Synthesis of Zeolite Y From Pyrophyllite [PDF]

open access: yes, 1996
用福州叶蜡石,在适量补硅的条件下,可合成出y型沸石产物,用Xrd进行了表征,其硅铝比为4.1~5.0,每克叶蜡石可制出1.2克产品,对焙烧和合成过程进行了分析和讨论,试验结果表明:叶蜡石可作为合成y型沸石的廉价原料,有良好的应用前景。Zeolite Y was synthesised From Fuzhou pyrophyllite under condition of adding an amount of Na_2 SiO_3.The products were characterized by ...
刘新锦, 黄铁钢
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Effect of structural properties of amine functionalized zeolite adsorbents support on CO2 adsorption performance [PDF]

open access: yes
In order to investigate the influence of the structural properties of amine functionalized zeolite adsorbents support on their CO2 adsorption performance and further explore effective methods for low-cost preparation of efficient CO2 adsorbents ...
Jingying LI   +3 more
core   +1 more source

Synthesis and characterization of germanophosphates with low-dimensional structure [PDF]

open access: yes, 2017
锗磷酸盐作为锗酸盐和磷酸盐研究方向的交叉,是一个新兴的研究领域,与其他金属磷酸盐相比数量有限。然而,在这些数量有限的锗磷酸盐化合物中却发现了诸多有趣的结构化学。比如,以GeO6作为“粘结剂”,使结构从二维磷酸盐到三维锗磷酸盐的结构自组装现象;具有沸石分子筛结构基元的锌锗磷酸盐(DABCO)•ZnGe(HPO4)3;在锗磷酸盐中引入F–离子使结构从高维到低维的结构裁剪现象等。同时锗磷酸盐也具有许多优异的物理化学性能,比如NASICON结构化合物MⅠGe(PO4)3(MⅠ=Na,K,Ag ...
陈长概
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Removal of Phosphate in Waste Water by Hydrothermal Synthesis Zeolite from Coal Fly Ash [PDF]

open access: yes
In this paper, the coal fly ash was used as the main raw material, and the low-cost P-type zeolite adsorbent was synthesized through the hydrothermal process.The coal fly ash and synthetic zeolite were systematically characterized by means of X-ray ...
Beibei CHEN   +6 more
core   +1 more source

FER Molecular Sieve Modification and Application to Catalytic Isomerization of n-Butene [PDF]

open access: yes, 2017
异丁烯是一种重要的基本有机化工原料,有着广泛的用途。本研究以镁碱沸石FER为催化剂,结合各种改性和后处理方法对催化剂的组成和表面酸性质进行调变,包括硝酸处理改性、尿素处理改性、离子交换改性三个部分,考察了三种改性对应FER分子筛特性的改变,及其对丁烯骨架异构化反应的催化性能(活性、选择性和稳定性)的影响。利用TG、BET、XRD、Py-IR、NH3-TPD、NMR及XRF等手段对催化剂进行表征分析。主要得到如下结果: 1、通过硝酸处理脱除FER骨架铝,降低强B酸中心数量;与此同时 ...
周杰
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Development of catalysts for synthesis of higher alcohols from syngas [PDF]

open access: yes, 2017
20世纪30年代开发了合成气转化为醇类的技术,但是直到20世纪70年代末北美石油危机的发生,对该技术的研究才引起人们的重视。从上世纪80年代至今,低碳混合醇合成的研究取得了突破性的进展,但迄今为止,该合成工艺仍存在产物选择性低,加氢产物中甲醇和烃类占比高的问题。本文从多壁碳纳米管(CNTs)负载的Ni-Mo-K氧化物基催化剂入手,研发出一种新型的多功能合成低碳混合醇催化剂,得到以下若干成果: 1.碳纳米管促进合成气制低碳混合醇Ni-Mo-K氧化物基催化剂的研究 用课题组自制的CNTs作为载体,利用共沉淀-
李丹
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Analyzing adsorption and diffusion behaviors of alcohol/water through MFI membranes by molecular simulation [PDF]

open access: yes, 2007
本文主要采用巨正则蒙特卡洛法(GCMC)、平衡分子动力学方法(EMD)和量子力学方法研究了水、甲醇、乙醇及它们的混合物在MFI沸石膜中的吸附与扩散现象。分子力学和分子动力学部分主要采用COMPASS力场,量子力学部分主要采用密度泛函理论(DFT)方法。 通过模拟得到的自扩散系数与吸附热值和实验值比较,确定了模拟参数和模拟方法后,我们以乙醇/水通过silicalite沸石膜的渗透分离为研究对象,分析了乙醇、水单组分及混合情况下的吸附等温线,吸附位,和不同浓度下的扩散系数变化,各组分扩散时的相互影响等情况 ...
杨金枝
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Application Research of Ion-Exchange Molecular Sieves in Oxygen-Argon Separation [PDF]

open access: yes
Inert gas argon has important applications in the fields of daily life, industrial manufacture and nuclear environmental monitoring. The key to its application is to selectively and efficiently separate and purify Ar from complex gas components. However,
Meng-yao MA   +7 more
core   +1 more source

Development of Silver-system Inorganic Antibacterial agents and Ceramics [PDF]

open access: yes, 2006
摘要本论文以化学共沉淀法制备的纳米羟基磷灰石、购买的商品人造沸石和活性氧化铝作为载体,分别采用液相法和固相法制备三种载银无机抗菌剂,并把三种抗菌剂用于制备抗菌陶瓷。对三种抗菌剂进行X射线衍射谱(XRD)和X射线光电子能谱(XPS)测试分析,研究表明:载银纳米羟基磷灰石经600℃热处理、载银铵改性沸石1000℃热处理、载银活性氧化铝1200℃热处理后,三种抗菌剂中的银都是以正一价离子和单质形态共同存在。实验中对三种抗菌剂的抑菌性能进行测试,抑菌环实验表明:随着载银量的增加 ...
苏炳煌
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