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If applied in drying solid materials, the solid materials will be accumulated in the region near the wall which is harmful for sufficient mixing of gas with solid phases.
Besides, if applied in drying sticky materials, such as sticky sludge, they will stick on the wall, and get thicker.
During the process of drying sticky materials the flushing effect of tangential wind to the wall is promoted by increasing Vtangential, which reduces the adhesion of sludge particles to the wall and increases the contact area between gas flow and sludge particles.
Quantitative evaluation of micro-mixing processes in fluidized beds[J].Journal of Power Engineering, Vol.27(1)(2007)：p.45-49
Computational fluid dynamics of a circulating fluidized bed under various fluidization conditions[J].Chemical Engineering Science, Vol.63(6)(2008): p.1696-1709

International Journal of Energy Research, 43(9) (2019), p.4797-4806
International Journal of Hydrogen Energy Vol. 30(3) (2005), p.225-237
Journal of Alloys & Compounds Vol. 397 (2005), p.58–62
[9] Information on Material Property Data, 2019, http://www.matweb.com/search/datasheet _print.aspx?
Earth and Environmental Science Vol. 140 (2018), p.012020.

Ltd, China) were used as starting materials in the experiments.
The room temperature luminescence from low dimensional ZnO nano-materials was reported [14-15].
Cheong: Journal of the Korean Physical Society.
Hall: [J].Science.
Libby: Science.

Rujijanagul1,a,* 1Department of Physics and Materials science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand 2Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna, Chiang Mai, 50300 Thailand arujijanagul@yahoo.com Keywords: Hydroxyapatite; Bioceramic, Metal Oxide, Abstract.
Acknowledgements The authors would like to thank Thailand Research Fund (FRT),National Metal and Materials technology center, Office of the Higher Education Commission (OHEC), Faculty of Science and the Graduate school, Chiang Mai University, Thailand of financial support.
Tas, Journal of The American Ceramic Society 81 (1998) 2245
Tontowi, Materials Science Forum 561–565 (2007) 1441
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Biogas production contributes as a sustainable alternative renewable energy because raw materials are easily obtained and economical [2].
Biogas Characterization Biogas used in this study comes from biogas reactors which have raw materials in the form of organic waste.
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True, researchers at the University of Nantes, together with the “Nantes Digital Sciences Laboratory (LS2N)”, offered their vision of the problem.
However, the high cost of materials and polyurethane wall surfaces, requiring large additional costs for their protection from sunlight and decoration, with all project attractiveness, make it unpromising.
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At present, this issue in domestic science, according to the authors, has not been studied enough.
Such materials as foamed polyethylene and expanded polystyrene meet these criteria. 2.
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Experimental program Raw materials.
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To start a product innovation project, we need to know why we update or create such a product, how many attributes should be considered carefully, who is our new product’s latent customers, what kind of new materials can be applied and how to produce it et al.
Acknowledgements This research has been supported by grants from National Natural Science Foundation of China (#70871111, # 70921061), Soft Science Research Project (#2009A10033), Bureau of Science and Technology of Ningbo, Gansu Science and Technology Support Program (#090GKCA030) and Humanities and Social Science Research Program of China (#09YJC630198).
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