作者：
Keng XieHuizhou LiuKey Laboratory of Green Process and Engineering
State Engineering Laboratory of Clean Production Technology for Hydrometallurgy Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China Graduate University of the Chinese Academy of Sciences
Beijing 100039 China Key Laboratory of Green Process and Engineering State Engineering Laboratory of Clean Production Technology for Hydrometallurgy Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China
An experimental investigation is presented on Ti (Ⅳ) extraction from acidic sulfate solutions using trialkylphosphine oxide (TRPO) in dodecane as an *** effects of H2SO4 concentration, TRPO concentration and phase ra...
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An experimental investigation is presented on Ti (Ⅳ) extraction from acidic sulfate solutions using trialkylphosphine oxide (TRPO) in dodecane as an *** effects of H2SO4 concentration, TRPO concentration and phase ratio O/A on the phase behavior and extraction behavior of the system were *** splitting of a system from biphasic to tfiphasic is *** third phase appears at different aqueous H2SO4 concentrations with varying initial TRPO concentrations and the volume of the middle phase increases as the volume of TRPO added increases.
Synthesis of inorganic nanostructures with specific size and well defined morphologies has attracted considerable attention due to their superior electrical, optical, magnetic, and chemical properties. Up to now, vari...
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Synthesis of inorganic nanostructures with specific size and well defined morphologies has attracted considerable attention due to their superior electrical, optical, magnetic, and chemical properties. Up to now, various kinds of metal oxide, sulfide, and hydrate with controlled hierarchical and complex morphologies have been successfully synthesized.
The effects of H2 in the feed gasses on the Chichibabin condensation of ammonia with formaldehyde and acetaldehyde for pyridine and 3-picolines synthesis were studied in this work. It was observed that over Pt/ZSM-5 a...
The effects of H2 in the feed gasses on the Chichibabin condensation of ammonia with formaldehyde and acetaldehyde for pyridine and 3-picolines synthesis were studied in this work. It was observed that over Pt/ZSM-5 and H-ZSM-5 catalyst hydrogen can moderate the deactivation, depressed the coke formation, slightly lower the initial yield of pyridine bases and increase the selectivity of pyridine over 3-picoline. These effects cannot be simply attributed to the reactant dilution by H2, while are similar as those of spilt-over hydrogen on a Pt/ZSM-5 catalyst on this reaction. These phenomena are taken as the evidence to support the hypothesis that molecular H2 is activated by the pure zeolite during the Chichibabin condensation.
A kind of phosphonium family based IL, [PC6C6C6C14][Tf2N]under several conditions was studied and the nano-structures (Fig.1) were observed using molecular dynamics simulation based on both all-atom and united-atom fo...
A kind of phosphonium family based IL, [PC6C6C6C14][Tf2N]under several conditions was studied and the nano-structures (Fig.1) were observed using molecular dynamics simulation based on both all-atom and united-atom force ***, little uniform and explicit standards for judging the nano-structure, or in another way, the aggregation in ILs have been reported.
Liquid biofuels are seen as one of the few technological solutions currently available to reducing greenhouse gas emissions from *** back the history of biofuels,so-called 1st generation biofuels are essentially based...
Liquid biofuels are seen as one of the few technological solutions currently available to reducing greenhouse gas emissions from *** back the history of biofuels,so-called 1st generation biofuels are essentially based on food stuff such as sugar, starch, and *** greatest disadvantage of 1st generation biofuels is to compete w1th foodproduction for scarce agricultural land and water, so that the amount of biofu els that can be produced from these sources is limited.
Light olefins mainly refer to ethylene and propylene, which are very important organic chemical materials, and are key intermediates of various chemical materials such as synthetic plastic and chemical fiber.
Light olefins mainly refer to ethylene and propylene, which are very important organic chemical materials, and are key intermediates of various chemical materials such as synthetic plastic and chemical fiber.
The crevice corrosion of the Ni/Graphite abradable sealing coating with open porous for engine of aircrafts will happen,when it serves in marine environment.A simulated occluded corrosion cell was used to study chemic...
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The crevice corrosion of the Ni/Graphite abradable sealing coating with open porous for engine of aircrafts will happen,when it serves in marine environment.A simulated occluded corrosion cell was used to study chemical changes of Ni/Graphite coating in ***% NaCl solution at 35℃.The corrosion behaviors of Ni in simulated solution was investigated by potentialdynamic polarization test.X-ray diffraction (XRD) was used to study the corrosion *** results showed that as the anodic current passes through the cell,the pH value of occluded solution decreased and the Cl- migrates into the occluded cell,meanwhile the Ni2+ and Na+ migrates out the occluded *** Cl- concentration in the occluded cell increased and Ni(OH)2· XH2O generated outside the occluded *** curves showed that the corrosion potential Ecorr of Ni decreased when the pH decreased and the Cl- enriched.
The objective of this paper is to propose a universal methodology for performance assessment of run-to-run control in semiconductor manufacturing. The slope of the linear semiconductor process model is assumed to be k...
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The objective of this paper is to propose a universal methodology for performance assessment of run-to-run control in semiconductor manufacturing. The slope of the linear semiconductor process model is assumed to be known or subjected to mild plant/model mismatch. Based on an internal model control framework, analytical expressions of minimum variance performance (MVP) and best achievable performance (BAP) for a series of run-to-run control schemes are derived. In the methodology, closed-loop identification is utilised as the first step to estimate the noise dynamics via routine operating data, and numerical optimisation is employed as a second step to calculate the best achievable performance bounds of the run-to-run control loops. The validity of the methodology is justified by examples of performance assessment for EWMA control, double EWMA control and RLS-LT control, even under circumstances where the processes encounter model mismatch, metrology delay and more sophisticated noises. Several essential characteristics of run-to-run control are discovered by performance assessment, and valuable advice is offered to process engineers for improving the run-to-run control performance. Furthermore, a useful application example for online performance monitoring and optimal tuning of run-to-run controller demonstrates the advantage of the methodology.
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