DQ-Ⅳ催化剂在聚丙烯装置上的试生产

DQ-Ⅳ球形催化剂在扬子石油化工股份有限公司塑料厂聚丙烯装置上首次进行工业化试生产，分别试生产了均聚和嵌段共聚2种聚丙烯产品，并与进口催化剂和原国产催化剂生产作了对比。试生产表明，该催化剂活性较其他催化剂略高，并且活性释放平稳，能满足聚丙烯装置生产的需要，为聚丙烯装置催化剂的全面国产化作好了技术储备。     

SA-3100离心粒度分析条件对粒径真实测定的影响

用SA-3100型离心粒度分析仪测试粉体的粒度时,对同一样品的分析,往往会有不同的结果.通过对沉降介质和分散剂、最大粒径值的设定、以及测量模式的选择等影响因素作比较试验,寻求准确使用该仪器进行粒度分析的方法.     

集成污水水质在线监测装置的研制

介绍基于流动注射分析法的集成污水水质监测仪的研制，该装置可自动检测水中的COD、NH3-N和pH值。     

焦炉炉号识别与定位连锁系统控制

将计算机技术、无线传输技术与光电检测技术相结合，建立自动炉号定位系统，实现了焦炉四大车变压变频(VVVF)控制、精确定位及推焦计划的自动执行。     

利用钾盐混合物提高玻璃制品的强度

本文介绍了一种利用钾盐混合物并通过改变钾盐的比例来提高玻璃制品强度的方法。     

利用膨胀床吸附技术单步纯化分子伴侣—GroEL

Expanded bed adsorption (EBA) is an integrative downstream processing technique for the purification of biological substances directly from unclarified feedstock. In this study, molecular chaperone GroEL, an important protein folding helper both in vivo and in vitro, was purified by the single-step EBA technique from the unclarified homogenate of recombinant E. coli cells. Compared with packed bed adsorption, the EBA technique provided a single-step approach to yield an electrophoretic purity of GroEL. After the homogenate loading and column washing in the expanded bed mode, the GroEL protein was recovered by stepwise salt-gradient elution in packed-bed or expanded-bed modes, respectively. The expanded-bed elution mode was found as efficient as the packed-bed mode in the purification of GroEL from cell disruptate.     

开裂混凝土有效导热系数研究:三维模拟与试验验证

利用三维的细观数值模拟,研究了混凝土在单轴拉伸和压缩破坏过程中有效导热系数(ETC)的变化规律,并分别给出拉伸应变、压缩应变与ETC的定量关系。研究发现:(1)拉伸过程中,混凝土试件的ETC在塑性阶段显著下降(23%),但在软化阶段变化很小;(2)压缩过程中,混凝土试件的ETC在塑性强化阶段前期显著下降(30%),在塑性强化阶段后期趋于稳定,而在下降阶段又开始缓慢地减小;(3)骨料与砂浆间界面开裂所形成的界面热阻是导致混凝土ETC在塑性阶段急剧下降的主要原因;(4)开裂强化了混凝土导热性能的各向异性。随后,对单轴压缩破坏混凝土垂直于裂纹方向ETC(C-ETCV)进行了试验测量。数据表明:在单轴压缩过程塑性强化阶段前期,C-ETCV急剧下降20%~25%;在塑性强化阶段后期逐渐趋于稳定。随后利用模拟结果拟合确定了王家俊模型中的界面热阻因子,比较了王家俊模型与试验结果,两者比较吻合,证明了数值方法和王家俊模型的正确性。     

混合电解质NaBr+NaAc十H_2O体系的活度系数的测定

用电势法测定了298.15K以及I为0.1、0.5、1.0、1.5、2.0、2.5和3.0 mol/kg时,NaBr在混合电解质溶液NaBr+NaAc+H_2O中的活度系数.实验结果用Harned、SRJ和Pitzer方程拟合,得到各种方程的相互作用参数,由拟合的标准偏差得知,Pitzer方程的拟合精度略好于前2个方程.用Pitzer混合参数θ_(Br-Ac)和ψ_(Br-Na-Ac)计算了NaAc在该混合体系中的活度系数和体系的过量Gibbs自由能.     

Reforming of methane and coalbed methane over nanocomposite Ni/ZrO2 catalyst

Nanocomposite Ni/ZrO₂-AN catalyst consisting of comparably sized Ni metal and ZrO₂ nanoparticles is studied in comparison with zirconia- and alumina-supported Ni catalysts (Ni/ZrO₂-CP and commercial Ni/Al₂O₃-C) for steam reforming of methane (SRM) and for combined steam and CO₂ reforming of methane (CSCRM). The reactions are performed under atmospheric pressure with stoichiometric amounts of H₂O and CH₄ or (H₂O + CO₂) and CH₄ at 1073 K. Under a wide range of methane space velocity (gas hourly space velocity of methane GHSV_CH4 = 12,000–96,000 ml/(h g_cat.), the nanocomposite Ni/ZrO₂-AN catalyst always shows higher activity and stability for both SRM and CSCRM reactions. The two supported Ni catalysts (Ni/ZrO₂-CP and Ni/Al₂O₃-C) exhibit fairly stable catalysis under low GHSV_CH4 but they are easily deactivated under high GHSV_CH4 and become completely inactive when they are reacted for ca.100 h at GHSV_CH4 = 48,000 ml/(h g_cat.). The CSCRM reaction is carried out with different H₂O/CO₂ ratios in the reaction feed while keeping the molar ratio (H₂O + CO₂)/CH₄ = 1.0, the results prove that the nanocomposite Ni/ZrO₂-AN catalyst can be highly promising in enabling a catalytic technology for the production of syngas with flexible H₂/CO ratios (ca. H₂/CO = 1.0–3.0) to meet the requirements of various downstream chemical syntheses.     

纤维素LiCl/DMAc溶液流变性能研究

本文研究了9％LICI／DMAC纤维素溶液的流变性能。在该体系中纤维素溶液是非牛顿流体，属于假塑性流体，具有典型的幂律性。通过幂律方程拟合计算，其稠度系数为60～135，流动特性指数为0.62～0．70。随着浓度增大，稠度系数增大和流动特性指数降低；温度的变化对流动特性指数的影响不大，温度升高，流动特性指数略有减小，而稠度系数相对增大。溶液的粘度随着剪切速率的增大，开始时粘度迅速降低，后趋于稳定，这可能与纤维素分子在溶液中的取向有关。在不同剪切速率下，其流动活化能为23～30kJ．