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1.
辉钼精矿熔盐氧化工艺:Na2CO3—Na2MoO4—Na2SO4体系   总被引:1,自引:1,他引:0  
研究了辉钼精矿在Na2CO3-Na2MoO4-Na2SO4体系的熔盐氧化过程,探索了不同工艺参数对钼的转化率和脱硫率的影响。结果表明,在熔盐组成为1:1配料双为1:10,740℃,鼓风速度为5.95L/min,鼓风时间为10min的条件下,钼的转化率和脱硫率均可达99%以上。熔炼产物经水浸后,钼精矿中的钼和硫分别以Na2MoO4和Na2SO4形态进入溶液,以SO2形态进入熔炼尾气中的硫不超过总硫量  相似文献   

2.
超临界CO2萃取蛋黄粉中胆固醇的条件选择   总被引:4,自引:0,他引:4  
在萃取温度为40℃、CO2流量为3kg/h的条件下,按不同的萃取压力和不同的萃取时间萃取蛋黄粉中的胆固醇。试验结果表明,萃取压力为30MPa时,超临界CO2萃取对蛋共粉中胆固醇的选择性脱除效果最佳,胆固醇的脱除率随萃取时间的延长而显著增加。  相似文献   

3.
Na3AlF6—5%Al2O3熔体对铝电解机械掺杂碳阳极的润湿性研究   总被引:1,自引:0,他引:1  
采用机械掺杂法制备了掺有不同复合氧化物粉末的碳阳极,并测试了熔融状态下NA3AlF6-5%Al2O3熔体对不同掺杂电极的润湿性,实验结果表明,掺有LiAlO3和CaAl2O4的碳阳极对熔盐显示了较好的润湿性。  相似文献   

4.
脱除氮氧化的是治理空气污染的一大难题。本文利用活性碳纤维作为吸附材料,ACF为载体负载铜类,钾类化合物制成催化剂,并研究了这两种催化剂对NO的催化效果。实验结果表明,ACF是一种活性载体,Cu(NO3)2-ACF催化剂对NO具有较高经还原活性,而KOH-ACF催化活性更高。  相似文献   

5.
BaCl2.2H2O生产中脱硫方法的研究   总被引:1,自引:0,他引:1  
本文研究了BaCl_2·2H_2O生产中几种脱除含硫化合物的方法,从脱硫效果及成本上比较了各方法的优劣。  相似文献   

6.
Φ38×3;5×2000的不锈钢固定床积分反应器中对CuCrK/γ-Al_2O_3(组成为CuO20wt%,Cr_2O_35wt%,K_2CO_316wt%.其余为γ-Al_2O_3)进行了活性测试.测试条件为:催化剂尺寸φ2.5×2.5~3.5,负荷0.08g糠醛/g·催化剂·h.反应温度130~210℃,压力为常压.在这些条件下,催化反应共984h,糠醛转化率高于98.5%,糠醛选择性高于98.5%.对失活后的催化剂进行了氧化再生.200℃以下氧化再生主要是聚合物和氧作用,生成糠醛、糠醇,并脱除掉;200~300℃温度范围内的氧化再生是聚合物和氧作用生成CO_2和水.氧化再生过程中Cu ̄0基本上未被氧化,大部分铜仍以Cu ̄0的形式存在.  相似文献   

7.
采用化学分析、XRD、光学显微镜分析等方法,较系统地研究了R2O、R2SO4对硅酸盐水泥熟料烧成、矿物组成、晶体结构的影响。结果表明:R2O易形成固溶体KC23S12和NC8A3,其中K2O主要固溶在C2S中,形成KC23S12,使fCaO急剧升高;Na2O主要固溶在C3A中,形成NC8A3,fCaO有所增加。R2SO4降低了熟料烧成的液相粘度,对熟料烧成有利,fCaO含量很低。R2O和R2SO4都使A矿含量降低,晶体尺寸增大。  相似文献   

8.
用等离子喷涂技术制取了MO+Al2O3-TiO2、MOS2+Al2O3、TiO2+Cr3C2NiCr和MoS2+Cr3C2-NiCr复合涂层.利用SEM、XRD、和XPS等技术.观察和分析了涂层的显微结构和喷涂过程中的物相变化及添加成分对涂层耐磨性能的影响.在MM-200型磨损试验机上测定了涂层的滑动摩擦系数和磨损率.结果表明;Mo、MoS2与Al2O3-TiO2的结合性能较好,TiO2、MoS2在Cr3C2-NiCr涂层的气孔和裂纹处偏聚;添加MoS2对Al2O3-TiO2涂层的物相组成有明显的影响;适量的MO、MOS2加入Al2O3-TiO2中,可以降低涂层的摩擦系数和磨损率;而TiO2、MoS2加入Cr3C2-NiCr中,对涂层的摩擦磨损性能影响不大  相似文献   

9.
二氧化氯对蒽去除效果及反应机理研究   总被引:2,自引:0,他引:2  
研究在不同反应条件,如不同投量的二氧化氯ClO2、不同反应时间ClO2对多环芳烃蒽去除效果,并与液氯Cl2进行对比;同时对ClO2、Cl2与蒽反应机理进行了理论分析。  相似文献   

10.
Cr2O3,MgO对贝利特—硫铝酸钙水泥熟料矿物形成的影响   总被引:2,自引:0,他引:2  
应用XRD,EDAX等分析测试手段,了Cr2O3,MgO对贝利特-硫铝钙水泥熟料矿物形成的影响。结果表明,适量的Cr2O3,MgO主要固溶在C2S2,铁相及2C2S.CaSO4中,并可使C2S稳定为α-C2S及α’C2S以及稳定2CS2.CaSO4。当Cr2O3含量较高,使MgO在熟产矿物中的固溶量显著增加。  相似文献   

11.
纤维质材料在同向阴燃过程中气体   总被引:1,自引:0,他引:1  
在小型阴燃实验台上对纤维质材料的同向阴燃过程进行试验,并利用气相色谱仪对气体产物进
行分析检测.结果表明,在同向阴燃传播过程中,纤维质材料CO2的排放量不稳定,并且不同材料CO2的平
均排放速率差别较大,而CO的平均排放速率随材料的不同变化较小.随着空气流速的增加,同一种材料(
木屑)在阴燃过程中CO2的平均排放速率先增大后减少,而CO的平均排放速率随空气流速的变化不大.  相似文献   

12.
This paper presents a proposal for an experimental salt cavern in offshore ultra-deep water for CO_2 abatement, including the instrumentation plan and well conceptual design evaluated for carbon capture and storage(CCS) application. These studies are based on applied computational mechanics associated with field experimentation that has contributed to the technical feasibility of the underground potash mine at the State of Sergipe in Brazil. This knowhow allowed the stability analysis of several salt caverns for brine production at the State of Alagoas in Brazil and to the drilling through stratified thick layers of salt of the pre-salt reservoirs in Santos Basin. Now, this knowledge has been applied in the design of onshore and offshore salt caverns opened by dissolution for storage of natural gas and CO_2. The geomechanical study,through the application of computational mechanics, of offshore giant salt caverns of 450 m high by150 m in diameter, shows that one cavern can store about 4 billion Sm~3 or 7.2 million tons of CO_2.Before the construction of the giant cavern, which will be the first gas storage offshore in the world, it has been decided to develop an experimental one, with smaller size, to obtained field parameters. The experimental cavern will allow the calibration of parameters to be used in the structural integrity analysis of the cavern and well for storage of natural gas which is rich in CO_2 under high pressure.  相似文献   

13.
为了进一步提高水驱稠油油藏的开发效果,利用室内物理模拟实验方法,研究了普通稠油油藏水驱开发后期转CO2吞吐的开采机理及可行性,分析了影响CO2吞吐效果的各项工艺参数。实验结果表明,CO2吞吐的周期注气量、注气速度、焖井时间和生产过程中的井底流压及降压方式都对CO2吞吐效果有重要影响,合理控制各工艺参数可以在水驱稠油油藏得到较好的CO2吞吐效果。  相似文献   

14.
二元气体等温吸附-解吸中气分的变化规律   总被引:12,自引:1,他引:12  
进行了CH4—CO2和CH4-N2二元混合气体的等温解吸实验,分析了二元气体在解吸过程中各组分浓度的变化规律.结果表明,在CH4-N2二元气体的解吸过程中,吸附相中CH4组分的相对浓度逐渐增加,N2组分的相对浓度逐渐减少.在CO2-CH4二元气体的解吸过程中,吸附相中CO2组分的相对浓度逐渐增加,CH4组分的相对浓度逐渐减少.实验结果还证实了CO2在与CH4的竞争吸附中占据优势,而N2在与CH4的竞争吸附中处于劣势.注入CO2比注入N2可以更有效地置换或驱替煤层甲烷,提高煤层甲烷的采收率.  相似文献   

15.
The increasing anthropogenic CO_2 emission and global warming has challenged the China and other countries to seek new and better ways to meet the world's increasing need for energy while reducing greenhouse gas emissions. The overall proposition of this research is to develop a brand-new CO_2 physical and chemical sequestration method by using solid waste of coal mining and cementitious material which are widely used for goaf backfilling in coal mining. This research developed a new testing system(constant temperature pressurized reaction chamber(CTPRC)) to study the effects of different initial parameters on mineral carbonation such as different initial water-binder ratio, initial sample porosity and initial carbon dioxide pressure. The experimental results show that the CO_2 consumption ratio is 15%,10% and 7% higher with relatively high initial water-binder ratio, initial sample porosity and initial CO_2 pressure within 48 h. In addition, some physical and chemical evidence was found through the electron microscope scanning and XRD test to further explain the above test results. This proposed research will provide critical parameters for optimizing CO_2 sequestration capacity in this cementitious backfilling material with forming agent.  相似文献   

16.
对熔化级三元混合气体(Ar+CO2+O2)保护焊焊接16Mn钢的工艺性能进行了研究,当采用H08Mn2SiA焊丝,并配合以适当的规范时,三元气体最佳配比为Ar/CO2/O2=84/13/3;此时电弧稳定,飞溅最小,熔透情况,表面焊波致密及平滑性等最好,当三元混合气体中的氧小于5%时,氧在保护气中的氧化作用不明显。  相似文献   

17.
在常温常压下,利用汞压进样装置控制进样速度,降低气体样品在定量管中的压力波动,达到了精确测定的目的。测试精度达10~(-6).  相似文献   

18.
The use of supercritical CO_2 for shale gas extraction is a promising new technology. This paper explores current research into this process, looking at analysis of the mechanism of CH_4 displacement in nanoporous shale, the positive and negative effects accompanying its use for sequestration as well as organic extraction, the migration of elements and the swelling process, and the macro and micro control mechanisms involved in permeability enhancement in reservoirs. Fruitful directions for future research are also considered through comparison with hydraulic fracturing. The research findings indicate that Sc CO_2 fluid replacement can be used to increase gas production and seal up greenhouse gases as an effective, clean and safe method of shale gas exploitation. It is particularly effective for promoting the desorption of CH_4 in shale reservoirs that have developed fine neck-wide body pores, and the subtle structural changes effected by Sc CO_2 fluid in sensitive minerals in reservoirs with a high brittle mineral content also have a positive effect on permeability and storage capacity. The adsorption process has been characterized as consisting of three stages: short-term shrinkage, slow swelling, and stability; an expansion equation has been proposed for CO_2/CH_4 that incorporates competitive adsorption, collision desorption, and impingement re-adsorption. Sc CO_2 fracturing has been found to be more effective than hydraulic fracturing for dense reservoirs and more effective at linking up pore-micro-fissure-fracture systems.  相似文献   

19.
电厂O_2/CO_2煤粉燃烧技术是一种新型的煤粉燃烧技术,它采用纯氧和再循环烟气代替空气组织煤粉的燃烧,也被称作富氧燃烧技术或氧气/烟气再循环技术。本文介绍了O_2/CO_2燃烧技术国内外发展现状;阐述了电厂O_2/CO_2煤粉燃烧技术的特点,并以某电厂600MW亚临界四角切圆一次中间再热控制循环汽包炉对其特点进行了计算分析。研究表明:电厂O_2/CO_2煤粉燃烧技术是一种经济、高效、节能、环保的燃烧技术,正处于试验研究阶段。在低碳经济下,电厂O_2/CO_2煤粉燃烧技术的应用有利于推进国家节能减排目标的实现,符合建设资源节约型、环境友好型社会的要求。  相似文献   

20.
油气田开发中CO2腐蚀研究进展   总被引:30,自引:3,他引:27  
综述了油气田开发中CO2腐蚀的存在形式及影响因素,分析了不同腐蚀状况的机理,针对超临界流状态下CO2的性质及腐蚀实际,提出超临界腐蚀的观点.  相似文献   

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