Results 11 to 20 of about 22,356 (181)
, 2005 采用添加表面活性剂两步沉淀法制备了具有高表面铜相对浓度的超细甲醇合成催化剂：以组成为H2／CO／CO2／N2=66／27／3／4（体积比）的原料气对催化剂进行了活性评价。结果表明，该催化剂比传统并流沉淀法制备的铜基催化剂活性提高47．9％．比两步沉淀法和添加表面活性剂并流沉淀法制备的铜基催化剂活性分别提高9．3％和16．8％。利用SEM、XRD及XPS方法对催化剂的结构 ...
王铁军 +4 more
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Gongye shui chuli, 2005 介绍了新型同向流斜板沉淀池处理工艺，分析了新型同向流斜板沉淀池对悬浮物的去除情况，并与传统同向流斜板沉淀池进行比较。中试实验结果表明，新型同向流斜板沉淀池能很好地解决泥水分离问题，不存在传统同向流斜板沉淀池清水收集管易被堵塞现象，而且当表面负荷在30m3/(m2·h)时，SS去除率达98%以上，沉淀效率高于异向流沉淀池，为同向流斜板沉淀池的工程化应用开辟了广阔的前景。
张永亮, 刘凡清, 朱臻
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Prediction of asphaltene precipitation during CO2 injection
Petroleum Exploration and Development, 2010 Aimed at the possible phenomenon of asphaltene precipitation during CO2 injection, the equation of state established by Anderko was introduced to describe the phase behavior of precipitated asphaltene because of its strong polarity.
Huang Lei +5 more
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Aqueous zinc‐ion batteries (AZIBs) hold great promise for safe and sustainable energy storage, but their commercialization is impeded by severe Zn dendrite growth and interfacial instability. To address these challenges, we propose a defect engineering strategy employing ultrafine ZnAl2O4 (ZAO) nanoparticles (∼5 nm) with oxygen vacancy defects
Yilun Ren +9 more
wiley +1 more source
, 2005 随着中国科学院知识创新工程的实施，各研究所财政补贴收入也大量增加，货币资金存量也随之增长，因而在科研资金的管理上也出现了新的问题，如存在不同程度的“资金沉淀”现象。本文分析了“资金沉淀”现象产生的原因及其弊端，“资金沉淀”的种类 ...
董耕宇, 廖彩菊
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Gongye shui chuli, 2017 研究采用两段沉淀法处理含氟尾气和废水及固废减量化技术，一段沉淀以理论量95%~105%石灰乳为沉淀剂，将含氟废水中的95%以上的氟离子沉淀除去；二段沉淀以理论量150%~200%的石灰乳为沉淀剂，并用盐酸调节pH至中性，两段沉淀后的废水F-质量浓度为8~12 mg/L。该项技术具有沉淀剂用量少、沉降速度快、过滤性能好、滤饼含水率低和固废量少的优点，值得进行推广应用。
钱雪明 +7 more
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Shuitu Baochi Xuebao, 2020 针对猪场沼液有机质含量高，其他处理工艺周期长、成本高、难去除的问题。采用包含氧化钙水溶液和AlCl3的二元共沉淀体系去除沼液有机污染物。探究了沉淀剂配比、投加量、反应时间、沼液初始pH等因素对有机物去除效果的影响。结果表明：当共沉淀剂体积比为1：2.5、投加量为1：1（体积比）、反应时间60 min、pH为9时有机质最大去除率达到93%。通过对反应前后沉淀物XRD、FITR和SEM分析，表明共沉淀剂可与沼液中带负电有机质通过电荷吸引以及与正价金属离子的络合作用絮凝沉淀有机物 ...
杨爱爱 +4 more
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The Microstructure Evolution and Mechanical Properties of (FeCoCrNi)100‐x(AlCu)x High‐Entropy Alloys
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT This study systematically investigates the effects of AlCu addition on the microstructural evolution and mechanical properties of (FeCoCrNi)100‐x(AlCu)x (x = 0, 5, 10, 15, 20; at%) high‐entropy alloys (HEAs). The results reveal that the microstructure evolves from coarse equiaxed to refined equiaxed, dendritic, and ultimately dual‐phase ...
Shunfu Xie +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT NiFe‐based MIL‐55 metal‐organic frameworks (MOFs) face challenges in achieving atomically precise composition and reliable methods for uniform growth. This study addresses these challenges by applying a slow evaporation crystallization technique to crude colloidal MIL‐55 products from hydrothermal synthesis, resulting in highly uniform ...
H. R. Haris +10 more
wiley +1 more source
Dianci bileiqi, 2001 提出以共沉淀法再利用 Zn O压敏电阻废旧片的工艺方法 ,讨论了溶解酸、沉淀剂和沉淀 p H值的选择 ,研究了温度对沉淀粒径的影响。结果表明 ,用共沉淀法粉料比常规法粉料制得的 Zn ...
陈培荣 +4 more
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