炼焦煤与焦炭间硫转化关系的研究

取武钢炼焦生产用煤56种,进行实验室坩埚炼焦实验,研究煤与焦炭间硫的转化关系,以降低焦炭的硫分并合理用煤。研究结果表明,对于单种炼焦煤,煤焦间硫的转化率(ΔS)随挥发分(Vd)的增加而降低,且有较好的相关性;焦炭硫分与炼焦煤硫分的比例系数(ΔS/K)也随挥发分(Vd)的增加而降低。不管是单种炼焦煤还是其配合煤,其焦炭的硫分均随炼焦煤硫分的增加而增加,且有很好的相关性。     

Bismuth sulfide and its carbon nanocomposite for rechargeable lithium-ion batteries

Bi₂S₃ and Bi₂S₃/C nanocomposites prepared by high-energy mechanical milling were evaluated as electrode materials in lithium secondary batteries. For a Bi₂S₃/C nanocomposite, Bi₂S₃ nanocrystallites were well distributed in an amorphous carbon matrix. The reaction mechanism of the Bi₂S₃/C electrode was also examined during the first cycle. The Bi₂S₃/C nanocomposite anode showed superior electrochemical performance (ca. 500 mAh g⁻¹ and 85% of the capacity retention over 100 cycles).     

Kinetic investigation of sulfurized polyacrylonitrile cathode material by electrochemical impedance spectroscopy

To understand more about the sulfur composite prepared by sulfurized polyacrylonitrile at 300 °C, electrochemical impedance spectroscopy (EIS) is employed to investigate the electrochemical properties of the sulfur composite cathode during discharge process. The impact of discharge depth on the performance of sulfur composite materials is investigated. The electrolyte solution resistance, the charge transfer resistance and the interface impedance are evaluated from the EIS analysis. The charge transfer resistance and the interface impedance increase during delithiation and decrease during lithiation, while the concentration of Li⁺ in the composite decreases and increases, respectively. Meanwhile the electrolyte solution resistance is likely to keep stable. The interface resistance and charge transfer resistance of the sulfur composite cathode decrease rapidly after initial lithiation, while Li⁺ diffusion coefficient and exchange current density increase rapidly. After the initial lithiation, they are likely to keep stable. This study reveals more characteristics of the sulfur composite, which is considered to be a promising candidate for large capacity cathode material.     

Combined effect of H2O and SO2 on V2O5/AC catalysts for NO reduction with ammonia at lower temperatures

Combined effect of H₂O and SO₂ on V₂O₅/AC the activity of catalyst for selective catalytic reduction (SCR) of NO with NH₃ at lower temperatures was studied. In the absence of SO₂, H₂O inhibits the catalytic activity, which may be attributed to competitive adsorption of H₂O and reactants (NO and/or NH₃). Although SO₂ promotes the SCR activity of the V₂O₅/AC catalyst in the absence of H₂O, it speeds the deactivation of the catalyst in the presence of H₂O. The dual effect of SO₂ is attributed to the SO₄²⁻ formed on the catalyst surface, which stays as ammonium-sulfate salts on the catalyst surface. In the absence of H₂O, a small amount of ammonium-sulfate salts deposits on the surface of the catalyst, which promote the SCR activity; in the presence of H₂O, however, the deposition rate of ammonium-sulfate salts is much greater, which results in blocking of the catalyst pores and deactivates the catalyst. Decreasing V₂O₅ loading decreases the deactivation rate of the catalyst. The catalyst can be used stably at a space velocity of 9000 h⁻¹ and temperature of 250 °C.     

X-射线荧光光谱法测定催化剂中硫含量

采用X－射线荧光光谱中的基本参数法测定催化剂中硫元素含量，测量结果与化学分析法一致，此方法相对标准偏差小于7％，平均回收率为96％，检出限为0．01％，本方法简单，测定快速，测量结构准确。     

新型膨化硝铵硫磺工业炸药的研究

用膨化硝酸铵、硫磺、木粉和柴油作原材料，通过建立工业炸药配方设计及最优化数学模型，得到新型膨化硝胺硫横工业炸药配方。通过几种工业炸药的理论参数和实际爆炸性能的比较，得出新型膨化硝铵硫磺工业炸药具有低的成本和优良的爆炸性能。     

原油硫含量测定的意义

硫是石油组成的元素之一,不同石油的含硫量相差很大,由于硫对石油加工影响极大,所以含硫量常作为评价石油的一项重要指标。我国大多以传统的原油硫含量来评价其加工过程所产生的腐蚀程度,而国际上早以引用活性硫来更加合理的评价原油硫腐蚀。介绍了硫分析方法的重要性。此法采用法拉第电解定律的原理,具有操作快速、准确、方便等优点。     

ANTEK9000硫氮分析仪在润滑油分析中的应用

介绍了美国ANTEK9000硫氮分析仪的测定原理,说明了该系统对润滑油基础油及其生产原料中硫氮含量的测定,建立了不同硫氮含量的分析模式,阐述了采用该硫氮系统测定润滑油基础油及其生产原料中硫氮含量的适用性和可靠性,提出了仪器的维护、保养和正确的操作方法建议。     

气相三氧化硫甲苯磺化工艺及喷射环流反应器

主要介绍了气相三氧化硫甲苯磺化新工艺及喷射环流磺化反应器的结构。