共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
3.
本文依据SH/T0689-2000"轻质烃及发动机燃料和其他油品的总硫含量测定法",对紫外荧光法测定国Ⅴ汽柴油硫含量分析方法中的影响因素进行探究,主要从裂解温度、气体流量及进样速度对分析结果的影响等几个方面进行了实验,并得出了NSX-2100紫外荧光硫分析仪的最佳工作参数。 相似文献
4.
我们在完成测定微量S~(2-)的汞量法后,继续研究了硫的还原方法以测定总硫。文献介绍Alder法用金属钠还原转化油中硫为硫化钠较为简便。Debal的试验指出钾熔还原更为可靠。但根据国情,金属钠较金属钾易得。所以本文选用钠熔法,但该法只适用于沸点比煤油高的油品,又不能用于直接汞量滴定(腐蚀玻璃产生有干扰的金属离子)。为解决实用上的困难,我们进行了研究。用自制的微型不锈钢反应器,另加氢氧化钾促进钠熔,使油中硫定量转化为硫化钠,联合汞量滴定,确立了总硫的测定法。 相似文献
5.
采用动态库仑分析法对重油中硫进行测定。介绍测硫基本原理,仪器及试剂,实验方法。结果表明:该方法与标准方法〔GB/T38790《深色石油产品硫含量测定法(管式炉法)》〕测定值的绝对差值<0.15%。该方法的相对标准偏差(RSD)<3%,具有准确、快速、简便的特点。 相似文献
6.
7.
一种高有机硫煤的化学药剂脱硫研究 总被引:6,自引:0,他引:6
选择复合脱硫剂在酸性条件下研究脱硫条件(煤浆浓度、处理时间、复合脱硫剂的浓度及溶液酸度)对高有机硫煤总硫、无机硫和有机硫脱硫率的影响.研究表明,煤浆浓度越低、处理时间越长、复合脱硫剂的浓度越大、处理溶液的酸度越大,总硫、无机硫和有机硫的脱硫率越大,最后对处理液和脱硫精煤进行了组分分析,探讨了酸性条件下复合脱硫剂脱除煤中总硫的反应及脱硫机理. 相似文献
8.
国标中在对赤砂糖的蔗糖分进行检测的过程中,对于碱性醋酸铅加入量的描述比较模糊。文章对碱性醋酸铅的加入量对赤砂糖中蔗糖分测定的影响做了一些研究,结果显示,碱式醋酸铅的加入量最好小于2 g,以避免加入量过大导致后续的旋光测定受到影响,致使直接旋光读数P异常,使得测定结果错误。 相似文献
9.
10.
11.
Advantage was taken of an eighteen months' continuous run of the Dressler kiln of the Champion Porcelain Company firing to cones between 17 and 18, to observe the effect of the temperatures and the gas conditions in various parts of the kiln upon a large number of standard bodies and experimental mixes. The kiln and conditions within it are briefly described, as well as the types of bodies used. The observed changes in outward physical properties of the bodies are supplemented by petrographic-microscopic examinations in order to determine or explain the reasons for the behavior of the bodies. Three instances of the production of deposits of artificial minerals formed in the kiln during firing are also described and explanations for their occurrence are given. 相似文献
12.
13.
Three gas-fired downdraft test kilns built by the Ceramic Engineering Department of the Ohio State University are described and detailed drawings and bills of material are given. Results obtained with each kiln are discussed briefly. 相似文献
14.
Carl H. Geister 《Journal of the American Ceramic Society》1926,9(3):121-125
A suitable abrasion apparatus is described which is capable of measuring the wear resistance of flooring materials having widely varying physical properties. The requisite conditions of wear necessary to produce results comparable to those obtained in actual service are given. Other abrasion methods and their shortcomings for use in this problem are summarized. 相似文献
15.
16.
17.
18.
19.
20.
F. H. Norton 《Journal of the American Ceramic Society》1924,7(8):599-602
A laboratory slag test is described capable of giving quantitatively the resistance of refractories to slags. The method consists in continuously spraying powdered slag onto the hot specimens and allowing it to run off. The advantage of this test is the rapidity and small expense with which relatively accurate results can be obtained. 相似文献