J J109型甲烷化催化剂应用总结

介绍JJ109型甲烷化催化剂的性能、装填、升温还原情况，并结合甲烷化工艺流程，重点分析JJ109型甲烷化催化剂的运行情况及生产中的注意事项。     

J101机械故障报警器

我厂自行设计制作了一台 J101型机械故障报警器,其结构比较简单,通用性较强,在库顶绞刀和库顶皮带输送机等设备上都能使用,现将工作原理介绍如下(附线路图);报警器的传感元件采用 JAG 2型干簧管,它受磁铁控制。磁铁装在运转中的机械上,当磁铁一次又一次反复地靠近干簧管时,BG_1就不断地导通——截止——导通,在 BG_1集电极 A 点上就产生一     

J—28胶粘剂

在《粘接》1981年第6期第37页上介绍了J—28胶粘剂。该胶有三种型号,已得到较广泛的应用。 1.J—28—A型胶粘剂。 J—28—A型胶粘剂分为甲、乙两组份,使用时按甲∶乙=100∶11混合,固化条件足170℃,半小时,各组份配比为:     

分光光度法测定双J酸中J酸的含量

染料中间体双J酸中J酸的存在会对染料的色光产生明显影响。周云程等曾提出容量法测定双J酸中J酸的含量,但是,对于J酸含量较低的试样测定结果是不能令人满意的。A.A.Rafael报道了联用纸层析分离—紫外荧光鉴别—萃取—分光光度法测定J酸、双J酸混合物工作。J.H.Knox用高效液相色谱分离了J酸、双J酸。迄今为止,尚未见     

人口·粮食·化肥

从分析我国解放后至２０３０年这８０年间人口增长率是东汉至解放前２０００年间１７倍的这一基本事实出发，阐述了养活１６亿人口，粮食不能领事进口只能依靠自己的观点。若欲达到２０３０年人均占有粮食４００ｋｇ的目标，并假设其中５％进口，在耕地面积、化肥用量保持湾的情况下，单位面积粮食产量需从１９９５年的４２５０ｋｇ／ｈｍ＾２增加到２０３０年的５８１５ｋｇ／ｈｍ＾２。进一步说明施用化肥对增加粮食产量的重要作用     

卫浴·水·女人

浴室，一个与水息息相关的空间，总是灵动着水的气质。和水一起，浴室的气质变化多端，宛如行走于尘世的女子，或独立孤行，或妩媚、娇俗，或清纯、冷艳。     

Phase relationships in the Na<Subscript>2</Subscript>ZnP<Subscript>2</Subscript>O<Subscript>7</Subscript>–LiKZnP<Subscript>2</Subscript>O<Subscript>7</Subscript> system

The phase relationships in the Na₂ZnP₂O₇–LiKZnP₂O₇ system are studied. They are represented by a mixture of the starting components in the subsolidus region. The eutectic was found at a temperature of 640°C and composition of 0.5LiKZnP₂O₇. The phase formation of this system is compared with the previously studied NaKZnP₂O₇–LiKZnP₂O₇ system. It is shown that a structural factor affects the geometry of the state diagrams.     

景德镇&#183;昌南道友&#183;艺术馆

中华向号瓷之国 China．中国在世界上的名号，意味着瓷器，起源于昌南。令十六位陶瓷艺术家感受着庄严、荣耀与责任……神圣的使命感召唤着他们自愿集合为“昌南道友”。昌南：景德镇古代的称谓。道友：在追求艺术大道上结伴而行的战友。     

Exploring the Redox Behavior of La<Subscript>0.6</Subscript>Sr<Subscript>0.4</Subscript>Mn<Subscript>1−x</Subscript>Al<Subscript>x</Subscript>O<Subscript>3</Subscript> Perovskites for CO<Subscript>2</Subscript>-Splitting in Thermochemical Cycles

Mixed oxides with perovskite structure have been proposed as promising alternative for the solar fuel production via thermochemical redox cycles. For this work, the system La_0.6Sr_0.4Mn_1?xAl_xO₃ (x?=?0 to 0.8) was selected according to its high thermal stability and rapid oxidation kinetics, and the influence of the Al/Mn ratio on the redox properties was investigated. The characterization of the five oxides samples with different Al content confirmed the high redox capacity and the favorable behavior of these materials in consecutive cycles, as analyzed thermogravimetrically. The results show that following reduction at 1300?°C in inert atmosphere up to 0.32 mmol g^?1 of O₂ are released, while a 10-cycle reaction test confirms the feasibility of long term operation with these perovskites. It was observed that the reduction extent was enhanced with increasing the Al-content, but the oxidation degree is maximum for compositions near x?=?0.5, corresponding to an O₂ release of 0.318 mmol g^?1 (δ?=?0.132). After selecting the compositions with more promising redox properties, additional reactions were performed in a lab-scale fixed bed reactor with injection of CO₂ in the oxidation step at 900?°C in order to generate CO. In these tests, the most interesting results were obtained for the perovskite La_0.6Sr_0.4Mn_0.6Al_0.4O_3, with reduction extent of 0.266 mmol?g^?1, but the production of CO is in comparison significantly lower (0.114 mmol?g^?1). Further studies are required to determine the best operation conditions for thermochemical cycles using those materials.     

Photon interaction parameters for some ZnO–Al<Subscript>2</Subscript>O<Subscript>3</Subscript>–Fe<Subscript>2</Subscript>O<Subscript>3</Subscript>–P<Subscript>2</Subscript>O<Subscript>5</Subscript> glasses

Some photon interaction parameters such as mass attenuation coefficient, effective atomic number, half value layer, mean free path and electron density for 15ZnO–(17.5–x)Al₂O₃–xFe₂O₃–67.5P₂O₅ glass system (x = 0, 7.5, 12.5, 17.5) and 15ZnO–(25–x)Al₂O₃–xFe₂O₃–60P₂O₅ glass system (x = 0, 25) have been investigated in the photon energy range of 1 keV to 100 GeV. It has been observed that all the photon interaction parameters for the selected glass systems vary with the photon energy. Among the selected glass systems, the sample 15ZnO–25Fe₂O₃–60P₂O₅ glass system shows maximum values for mass attenuation coefficients, effective atomic numbers, electron densities and minimum values for mean free path and half value layer in the entire energy grid.     

Hydroisomerization of Benzene-Containing Gasoline Fraction on Pt/B<Subscript>2</Subscript>O<Subscript>3</Subscript>–Al<Subscript>2</Subscript>O<Subscript>3</Subscript> and Pt/WO<Subscript>3</Subscript>–Al<Subscript>2</Subscript>O<Subscript>3</Subscript> Catalysts

The effect of the hydroisomerization conditions of the benzene-containing fraction of catalytic reforming gasoline on the yield and composition of products is studied on Pt/B₂O₃–Al₂O₃ and Pt/WO₃–Al₂O₃ catalysts. These catalysts allow benzene to be completely removed from the raw material. At the same time, the greatest yields of liquid products are obtained with minimal losses of the octane number at 2 MPa, a mass feedstock hourly space velocity (MFHSV) of 2 h^?1, and 325°C: 96.3 and 95.4 wt % on Pt/B₂O₃–Al₂O₃ and Pt/WO₃–Al₂O₃ catalysts, respectively. The activity of the catalysts is maintained for 100 h during their operation.     

再论“人口&#183;粮食&#183;环境&#183;肥料”

依据我国经济高速增长、社会进步及饮食结构变化,讨论了我们人口与粮食的关系,饮食结构对国家粮食安全以及畜禽业发展与施肥对环境的影响.介绍了我国农田生态系统N、P2O5、K2O、S、Ca和Mg的养分平衡.在S、Ca、Mg养分平衡中,过磷酸钙、钙镁磷肥起到了重要作用.在小麦基肥和玉米追肥中,碳铵、硝铵均优于尿素.探讨了缓释、控释肥用于超级玉米、超级水稻种植的可能性.     

Structural heterogeneity of SiO<Subscript>2</Subscript>–Na<Subscript>2</Subscript>O–Al<Subscript>2</Subscript>O<Subscript>3</Subscript> glass

It is shown that the phase heterogeneity of SiO₂–Na₂O–Al₂O₃ glass has a liquation and crystallization nature, the balance between which is determined by the conditions of their synthesis. An increase in the aluminum oxide content decreases the number of liquation and crystallization sites, and also the linear sizes of the crystalline formations without eliminating the phase separation due to the liquation. The area of metastable immiscibility in the SiO₂–Na₂O–Al₂O₃ system, which is determined by scanning electron microscopy, is probably wider than the area detected by the optical methods.     

美国孟山都环境化学公司经理J.J.Tully先生访华

应中国化工建设总公司的邀请,美国孟山都环境化学公司销售经理J.J.Tully先生于1993年2月5日至21日访华,先后访问了广东湛化企业集团公司、湖南衡阳湘南化工厂、四川省化工设计院、荆门石化总厂和湖北潜江化工总厂,与这些单位进行了技术交流,并探讨了在硫酸技术改造、催化剂生产、     

J—50快干胶试制成功

黑尤江省石油化学研究所研制成功 J-50快干胶。该胶以甲基丙烯酸类为单体、异丙苯过氧化氢为引发剂而制得,具有固化快、透明度好、粘接强度高等性能。可用在需要快速粘接(如流水作业)的机械加工、零件固定、仪器