LEADER 02152nam 2200553I 450 001 9910706567503321 005 20171122103543.0 035 $a(CKB)5470000002456771 035 $a(OCoLC)1012611025 035 $a(EXLCZ)995470000002456771 100 $a20171122j200102 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aEffects of gravity on cocurrent two-phase gas-liquid flows through packed columns /$fBrian J. Motil, Vemuri Balakotaiah, Yasuhiro Kamotani 210 1$aCleveland, Ohio :$cNational Aeronautics and Space Administration, Glenn Research Center,$dFebruary 2001. 215 $a1 online resource (10 pages) $cillustrations 225 1 $aNASA/TM ;$v2001-210705 300 $a"February 2001." 300 $a"Prepared for the 39th Aerospace Sciences Meeting and Exhibit sponsored by the American Institute of Aeronautics and Astronautics, Reno, Nevada, January 8-11, 2001." 300 $a"Performing organization: National Aeronautics and Space Administration, John H. Glenn Research Center at Lewis Field"--Report documentation page. 300 $a"AIAA-2001-0767." 320 $aIncludes bibliographical references (page 10). 606 $aTwo phase flow$2nasat 606 $aLiquid flow$2nasat 606 $aLiquid-gas mixtures$2nasat 606 $aGravitational effects$2nasat 606 $aFlow characteristics$2nasat 606 $aTransition flow$2nasat 606 $aFlow distribution$2nasat 615 7$aTwo phase flow. 615 7$aLiquid flow. 615 7$aLiquid-gas mixtures. 615 7$aGravitational effects. 615 7$aFlow characteristics. 615 7$aTransition flow. 615 7$aFlow distribution. 700 $aMotil$b Brian J.$01400570 702 $aBalakotaiah$b Vemuri 702 $aKamotani$b Yasuhiro 712 02$aNASA Glenn Research Center, 801 0$bGPO 801 1$bGPO 906 $aBOOK 912 $a9910706567503321 996 $aEffects of gravity on cocurrent two-phase gas-liquid flows through packed columns$93515399 997 $aUNINA LEADER 03413nam 2200433z- 450 001 9910557221203321 005 20211118 035 $a(CKB)5400000000041732 035 $a(oapen)https://directory.doabooks.org/handle/20.500.12854/73729 035 $a(oapen)doab73729 035 $a(EXLCZ)995400000000041732 100 $a20202111d2020 |y 0 101 0 $aeng 135 $aurmn|---annan 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aFrom Glycerol to Value-Added Products 210 $cFrontiers Media SA$d2020 215 $a1 online resource (171 p.) 311 08$a2-88963-577-5 330 $aIn a context where the role of biofuels will continue to grow, it is necessary to take into account the current state of their various manufacturing processes and to anticipate the expansion of the market. Thus, current biodiesel production processes generate a significant amount of glycerol as a by-product (about 100 kg per ton of processed vegetable oil). An explosion of the biodiesel market must integrate the valorization of glycerol whose current market of distribution (cosmetics, drugs, polymers, etc.) is not guaranteed such an expansion. This valuation will contribute effectively to the profitability and sustainability of the processes from which it derives. Glycerol physicochemical and toxicological properties give it the potential to be used as solvent, biolubricant, dispersant, and surfactant, among others. It is also widely used in the food industry as a preservative and sweetener. Beyond these applications, glycerol can also be used as a raw material for a wide range of chemicals. Glycerol is a highly functionalized molecule with specific physico-chemical properties, which can be used in different reactions as a reactant or a building block. For example, glycerol can be used as a starting material for antibiotic production, biosurfactants, organic acid production (lactic, propionic, succinic, citric acid, glyoxylic acid, glyoxalic acid, amino acids, etc.), alcohols (propanediols), glycerol esters, acrolein production, etc. These products can be obtained either through chemical reactions such as acetalization, dehydration, glycerolysis, esterification, etherification, aqueous phase reforming, oxidation, carboxylation, electrochemical routes, or through enzymatic reactions. However, it must be kept in mind that the development of industrial processes relies on the use of crude glycerol from biodiesel production. For that purpose, robust processes involving impurities-insensitive catalysts or pre-purification have to be developed. Finally, the separation of the chemical products obtained after glycerol conversion is also a key step toward the development of viable glycerol-based processes. 606 $aScience: general issues$2bicssc 610 $aactivation 610 $aadded value bio-based products 610 $acatalysis 610 $aelectrochemical conversions 610 $aglycerol 610 $agreen chemistry 610 $aprocess 615 7$aScience: general issues 700 $aCognet$b Patrick$4edt$01280601 702 $aKheireddine Aroua$b Mohamed$4edt 702 $aCognet$b Patrick$4oth 702 $aKheireddine Aroua$b Mohamed$4oth 906 $aBOOK 912 $a9910557221203321 996 $aFrom Glycerol to Value-Added Products$93017276 997 $aUNINA LEADER 01186nam0 22003011i 450 001 UON00059015 005 20231205102259.15 100 $a20020107d1929 |0itac50 ba 101 $aara 102 $aEG 105 $a|||| 1|||| 200 1 $aAlam Verter$fW. Goethe$gnaqalahu 'an al-faransiyyah Ahmad Hasan az-Zayyat 205 $a[4a ed.] 210 $aal-Qahira$cMatba'ah al-i'timad$d1308 H. 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