Optimum material ratio for improving the performance of cement-mixed soils

The metal–organic framework MIL-101(Cr) is known as a solid–acid catalyst for the solution conversion of biomass-derived glucose to 5-hydroxymethyl furfural (5-HMF). We study the substitution of Cr3+ by Fe3+ and Sc3+ in the MIL-101 structure in order to prepare more environmentally benign catalysts. MIL-101(Fe) can be prepared, and the inclusion of Sc is possible at low levels (10% of Fe replaced). On extended synthesis times the polymorphic MIL-88B structure instead forms.Increasing the amount of Sc also only yields MIL-88B, even at short crystallisation times. The MIL-88B structure is unstable under hydrothermal conditions, but in dimethylsulfoxide solvent, it provides 5-HMF from glucose as the major product. The optimum material is a bimetallic (Fe,Sc) form of MIL-88B, which provides ~70% conversion of glucose with 35% selectivity towards 5-HMF after 3 hours at 140 °C: this offers high conversion compared to other heterogeneous catalysts reported in the same solvent.

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The Map of Logistics Technologies Used in Corporate Logistics

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.708.70 ◽

2014 ◽

Vol 708 ◽

pp. 70-75

Author(s):

Andrea Rosova ◽

Peter Kacmary ◽

Romana Hricová ◽

Jozef Husár

Keyword(s):

Information Flow ◽

Material Flow ◽

Transformation Process ◽

Actual Production ◽

Optimum Material ◽

Corporate Goals ◽

Value Flow ◽

Material Information ◽

Optimum Balance

Corporate logistics a major tool used to facilitate corporate goals. By definition it is a set of tasks, arranged in a way that promotes optimum material, information and value flow during the transformation process. As the above definition implies, the corporate logistics provides visualization of material flow throughout the corporation. Whereas the planning defines what will be produced, the actual production defines the production means. In contrast, the logistics provides for means and measures to ensure production preparedness, providing not only for the actual production of goods but also for a timely and effective information flow in order to achieve optimum balance of all flows in support of corporate objectives.

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Determining Optimum Material Mixture Ratio and Hot-pressing Parameters for New Hybrid Fiber-reinforced Composites: Modeling and Optimization by Response Surface Methodology

BioResources ◽

10.15376/biores.13.2.4202-4223 ◽

2018 ◽

Vol 13 (2) ◽

Author(s):

Wei Song ◽

Minghao Zhu ◽

Wei Lin ◽

Shuangbao Zhang

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Hot Pressing ◽

Fiber Reinforced Composites ◽

Reinforced Composites ◽

Fiber Reinforced ◽

Hybrid Fiber ◽

Mixture Ratio ◽

Modeling And Optimization ◽

Optimum Material

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Development of ASTM Standards in Support of Advanced Ceramics — Continuing Efforts

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education ◽

10.1115/98-gt-530 ◽

1998 ◽

Cited By ~ 3

Author(s):

Charles R. Brinkman

Keyword(s):

International Standards ◽

Material Behavior ◽

Composite Ceramics ◽

Advanced Ceramics ◽

Component Reliability ◽

Nondestructive Examination ◽

Analysis And Design ◽

Optimum Material ◽

American Society ◽

Statistical Analysis And Design

An update is presented of the activities of the American Society for Testing and Materials (ASTM) Committee C-28 on Advanced Ceramics. Since its inception in 1986, this committee, which has five standard producing subcommittees, has written and published over 32 consensus standards. These standards are concerned with mechanical testing of monolithic and composite ceramics, nondestructive examination, statistical analysis and design, powder characterization, quantitative microscopy, fractography, and terminology. These standards ensure optimum material behavior with physical and mechanical property reproducibility, component reliability, and well-defined methods of data treatment and material analysis for both monolithic and composite materials. Committee C-28 continues to sponsor technical symposia and to cooperate in the development of international standards. An update of recent and current activities as well as possible new areas of standardization work will be presented.

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