Modelling of composting of food waste in a column reactor

The composting of organic solid waste, the mixture of fruit and vegetable leftovers enriched with night soil, was investigated in a closed thermally insulated reactor. It was found that 80.9 % of the original substrate biodegraded after 14 days. A mathematical model of the column reactor was proposed where the biodegradation rate of the organic solid waste was described using simple n-thorder kinetics. A good prediction of process performance was obtained using the proposed kinetics and experimentally obtained reaction heat. Presented at the 33rd International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 22–26 May 2006.     

Theoretical Analysis of the Motional Model of Nonlinear Heterogeneous Catalysis

In this paper, a model of the motional nonlinear heterogeneous catalysis process is discussed using the characteristic line method, the analytical results of elution profile are obtained and the formula which determines the parameters of reaction rate and adsorption isotherm through the motional measurement data under the nonlinear condition is given.     

Kinetics of muonic hydrogen drift in axial symmetric geometry

The kinetics of muonic atoms of hydrogen isotopes in an axially symmetric trap is studied. The problem of the determination of the initial kinetic energy distribution of µp and µd atoms from time-of-flight spectra is discussed. The effects of the scattering of muonic atoms from gas and of the stopping distribution are evaluated. When the collision length is much larger than the target radius, the moments of the kinetic energy distribution are shown to be determined by the time-of-flight spectrum in a model-independent way.     

甲烷分子在碱性催化剂上的吸附与酸碱活化机理

以碳酸锶为甲烷吸附活化的模型催化剂，用切换变应答、ＣＨ４（ＣＯ２）－ＴＰＤ等技术，对甲烷的吸附、碱性对催化剂性能的影响进行了研究，结果表明，甲烷在碳酸锶上的活化显示出明显的酸碱活化机理特征，瞬变应答及ＴＰＤ结果均证明，甲烷在碳酸锶表面有较强的吸附，其脱附温度约３１０℃，关联结果表明，甲烷转化率及Ｃ２烃收率与催化剂表面ＳｒＯ碱性中心浓度有非常一致的顺变关系，因此催化剂表面的酸碱中心可能是甲烷的选择活     

磷酸三丁酯从硝酸介质中萃取铀（Ⅵ）的动力学研究

用上升单液滴法和恒界面池法研究了磷酸三丁酯-环己烷从硝酸介质中萃取铀(Ⅵ)的动力学。萃取过程为扩散控制,得到了在扩散控制下影响萃取速率的一些规律。     

兖州高硫煤的加氢热解脱硫及脱硫动力学

在加压热天平上，考察了氢气和氮扬气氛下高硫煤的热解脱硫。利用气相色谱在线分析研究了硫化氢氢气的逸出规律。结果表明，加氢热解比氮气下的热解有着更显著的脱友作用，脱硫率可达９０％以上。而且加氢热解下６５％的脱除硫转化为气相硫化氢，而氮气下热解是有８０％的硫转化为液相。     

膨润土对结晶紫的吸附

用分光光度、显微电泳和ｘ－射线衍射等方法研究了膨润土对结晶紫的吸附；实验表明，钙型膨润土在吸收结晶紫溶液时，加入钠盐可明显改善吸附效果。     

活性炭负载杂多酸催化剂的研究进展

介绍了以活性炭为载体的负载型杂多酸催化剂的研究进展,包括制备方法、影响负载量的因素、负载催化剂的性质、吸附模型和脱附作用。总结了杂多酸在活性炭上的吸附形态研究以及杂多酸与活性炭表面含氧基团的化学键合作用的研究成果,展望了该催化剂未来的研究方向。     

取向聚对苯二甲酸乙二酯纤维的非等温结晶动力学

取向聚对苯二甲酸乙二酯纤维的非等温结晶动力学张志英，赵家森（天津纺织工学院材料科学系天津３００１６０）关键词取向高聚物，聚对苯二甲酸乙二酯，非等温结晶，结晶动力学研究高聚物结晶动力学常用的等温方法有光透射法、密度法、显微镜法、Ｘ－射线衍射法、差示扫描...     

MONTE CARLO STUDY ON THE CRITICAL ADSORPTION POINT OF BOND-FLUCTUATED POLYMER CHAINS TETHERED ON ADSORBING SURFACES

 The behavior of three-dimensional bond fluctuation model chains tethered on an adsorbing flat surface was simulated by the Monte Carlo method. The dependence of the number of surface contacts M on the interaction strength e and the chain length N was investigated by a finite-size scaling law M = N[a₀ + a₁N^1/v_k + O((N ^1/v_k)²)] for e near the critical adsorption point e_c, i.e., k ≡(e-e_c)/e_c closes to 0. The critical adsorption point was estimated to be e_c = 0.93, and the exponents  = 0.49 and 1/v= 0.57.