Predicting the Effective Thermal Conductivity of Tribocomposites with Coated Antifrictional Inclusions

Russian Engineering Research - By means of a generalized effective-field approximation, formulas are derived for the effective thermal conductivity of a three-component tribocomposite based on a...     

System analysis of innovation activities by leading companies of the chemical industry (1995 to 2007)

The system analysis of innovation development in leading chemical and petrochemical companies was carried out on the basis of the most significant indicators. This analysis involved the whole ensemble of companies (135 factories, plants, etc.) and information aspects (regional, industrial, time (1995 to 2007), etc.     

Utilization of waste for large capacity productions of phosphorus-containing products based on the system analysis methods

Waste from the phosphorus industry are one of the key environmental problems for manufacturers all over the world. An innovative strategy for phosphorus industry waste utilization was developed by the authors in collaboration with their colleagues within EC INCO-Copernicus ECOPHOS project. The first stage involves the analysis of main indicators of innovative development of leading phosphorus sector companies taking into account the influence of innovations on reduction of environmental pollution. At the second stage, a strategy was developed for phosphorus industry waste utilization, which was underpinned by development of an information CALS-system of marketing analysis. The analysis was done according to the following three top level criteria: the raw material and processing market analysis; analysis of processing technologies; and analysis of utilization products markets. At the third stage, analysis of the technologies of phosphorus industry waste processing was carried out on the basis flexible technology of phosphoric sludge utilization case study. The study was carried out within the advanced system of computer support—CALS-technologies (Continuous Acquisition and Life cycle Support).     

Large anisotropic negative thermal expansion in Cu-TDPAT metalorganic framework:A combined in situ X-ray diffraction and DRIFTS study

Cu-TDPAT(H₆TDPAT=2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine),a stable nanoporous metal-organic framework with rht topology,has sparked broad interest as an adsorbent for several chemical separation processes.In this work,in situ synchrotron diffraction experiments followed by sequential LeBail refinements reveal that Cu-TDPAT shows unusually large anisotropic negative thermal expansion(NTE).The PASCal crystallography tool,used to analyze the magnitude of the NTE,reveals an average volumetric thermal expansion coefficientαv=-20.3 MK^-1.This value is significantly higher than the one reported for Cu-BTC(also known as HKUST-1),which contains the same Cu-paddlewheel building unit,αv=-12 MK^-1.In situ synchrotron single crystal X-ray diffraction and in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)were employed to shed light on the NTE mechanism.Using these two methods,we were able to elucidate the three main structural motions that are responsible for the NTE effect.The more pronounced NTE behavior of Cu-TDPAT is attributed to the lower symmetry combined with the more complex ligand structure when compared to Cu-BTC.The knowledge obtained in this work is important for understanding the behavior of the adsorbent under transient variable temperature conditions in fixed adsorption beds.