Documents disponibles écrits par cet auteur

Experimental and modeling studies of the oxidation of surrogate bio-aviation fuels / Ida Shafagh in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 134 N° 4 (Avril 2012) 

Public ISBD [article]  in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 134 N° 4 (Avril 2012) . - 11 p. Titre : Experimental and modeling studies of the oxidation of surrogate bio-aviation fuels Type de document : texte imprimé Auteurs : Ida Shafagh, Auteur ; Kevin J. Hughes, Auteur ; Elena Catalanotti, Auteur ; Zhen Liu, Auteur Année de publication : 2012 Article en page(s) : 11 p. Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Aerospace  industry  Biofuel  Oxidation  Petrochemicals  Sensitivity  analysis Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Jet fuels currently in use in the aviation industry are exclusively kerosene-based. However, potential problems regarding security of supply, climate change, and increasing cost are becoming more significant, exacerbated by the rapidly growing demand from the aviation sector. Biofuels are considered one of the most suitable alternatives to petrochemical-based fuels in the aviation industry in the short to medium term, since blends of biofuel and kerosene provide a good balance of properties currently required from an aviation fuel. Experimental studies at a variety of stoichiometries using a flat flame burner with kerosene and kerosene/biofuel blends have been performed with product analysis by gas sampling and laser-induced fluorescence detection of OH, CO, and CO2. These studies have been complemented by modeling using the PREMIX module of Chemkin to provide insights into and to validate combined models describing the oxidation chemistry of surrogate fuels depicting kerosene, fatty acid methyl ester biofuels, and Fischer-Tropsch derived fuels. Sensitivity analysis has identified important reactions within these schemes, which, where appropriate, have been investigated by molecular modeling techniques available within Gaussian 03. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ000134000004 [...] [article] Experimental and modeling studies of the oxidation of surrogate bio-aviation fuels [texte imprimé] / Ida Shafagh, Auteur ; Kevin J. Hughes, Auteur ; Elena Catalanotti, Auteur ; Zhen Liu, Auteur . - 2012 . - 11 p. Génie mécanique Langues : Anglais (eng) in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 134 N° 4 (Avril 2012) . - 11 p. Mots-clés : Aerospace  industry  Biofuel  Oxidation  Petrochemicals  Sensitivity  analysis Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Jet fuels currently in use in the aviation industry are exclusively kerosene-based. However, potential problems regarding security of supply, climate change, and increasing cost are becoming more significant, exacerbated by the rapidly growing demand from the aviation sector. Biofuels are considered one of the most suitable alternatives to petrochemical-based fuels in the aviation industry in the short to medium term, since blends of biofuel and kerosene provide a good balance of properties currently required from an aviation fuel. Experimental studies at a variety of stoichiometries using a flat flame burner with kerosene and kerosene/biofuel blends have been performed with product analysis by gas sampling and laser-induced fluorescence detection of OH, CO, and CO2. These studies have been complemented by modeling using the PREMIX module of Chemkin to provide insights into and to validate combined models describing the oxidation chemistry of surrogate fuels depicting kerosene, fatty acid methyl ester biofuels, and Fischer-Tropsch derived fuels. Sensitivity analysis has identified important reactions within these schemes, which, where appropriate, have been investigated by molecular modeling techniques available within Gaussian 03. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://asmedl.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ000134000004 [...]

Onsite CO2 capture from flue gas by an adsorption process in a coal - fired power plant / Zhen Liu in Industrial & engineering chemistry research, Vol. 51 N° 21 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7355–7363 Titre : Onsite CO2 capture from flue gas by an adsorption process in a coal - fired power plant Type de document : texte imprimé Auteurs : Zhen Liu, Auteur ; Lu Wang, Auteur ; Xiangming Kong, Auteur Année de publication : 2012 Article en page(s) : pp. 7355–7363 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Flue  gas  Adsorption Résumé : The feasibility and efficiency of adsorption technology were evaluated experimentally and theoretically for CO2 capture from the flue gas in an existing coal-fired power plant, where a three-bed VPSA unit was set up to test 282 kg of adsorbent materials. In this work, the experimental results are reported for zeolite 5A as the adsorbent. The composition of the flue gas after dehydration was 15.0 vol % CO2, 76.5 vol % N2, and 8.5 vol % O2. With a three-bed seven-step VPSA process including rinse and pressure equalization steps, 85% CO2 was obtained with recovery of 79% from flue gas at a feed flow rate of 46.0 Nm3/h. The experimentally measured energy consumption was 2.37 MJ/(kg of CO2). The experimental work was compared with numerical simulations through the multibed VPSA modeling framework developed in a previous work. The simulated results were found to agree well with the experimental results. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3005308 [article] Onsite CO2 capture from flue gas by an adsorption process in a coal - fired power plant [texte imprimé] / Zhen Liu, Auteur ; Lu Wang, Auteur ; Xiangming Kong, Auteur . - 2012 . - pp. 7355–7363. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 21 (Mai 2012) . - pp. 7355–7363 Mots-clés : Flue  gas  Adsorption Résumé : The feasibility and efficiency of adsorption technology were evaluated experimentally and theoretically for CO2 capture from the flue gas in an existing coal-fired power plant, where a three-bed VPSA unit was set up to test 282 kg of adsorbent materials. In this work, the experimental results are reported for zeolite 5A as the adsorbent. The composition of the flue gas after dehydration was 15.0 vol % CO2, 76.5 vol % N2, and 8.5 vol % O2. With a three-bed seven-step VPSA process including rinse and pressure equalization steps, 85% CO2 was obtained with recovery of 79% from flue gas at a feed flow rate of 46.0 Nm3/h. The experimentally measured energy consumption was 2.37 MJ/(kg of CO2). The experimental work was compared with numerical simulations through the multibed VPSA modeling framework developed in a previous work. The simulated results were found to agree well with the experimental results. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie3005308

Recycling of waste printed circuit boards by microwave - induced pyrolysis and featured mechanical processing / Jing Sun in Industrial & engineering chemistry research, Vol. 50 N° 20 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11763–11769 Titre : Recycling of waste printed circuit boards by microwave - induced pyrolysis and featured mechanical processing Type de document : texte imprimé Auteurs : Jing Sun, Auteur ; Wenlong Wang, Auteur ; Zhen Liu, Auteur Année de publication : 2011 Article en page(s) : pp. 11763–11769 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Recycling  waste  Pyrolysis Résumé : The combination of microwave-induced pyrolysis and mechanical processing is a promising way to recycle the waste printed circuit boards (WPCBs). In pyrolysis, WPCBs yield an average of 78.6 wt.% solid residues, 15.7 wt.% oil, and 5.7 wt.% gas. The solid residues are rich in metals; the oil is abundant with phenol and substituted phenols which can be reclaimed as chemicals or fuels; and the gas is combustible with a caloric value of 4504 kcal/m3. Our featured mechanical processing, including crushing and specially designed sink-float separation, is very suitable for metal reclamation from the pyrolysis residues. Over 99 wt.% of metals can be dissociated by the crushing step; the final recycling rate and grade of metals in the separation step can amount to 95 wt.% and 96.5%, respectively. The economic assessment reveals that the combined treatment is amazingly profitable and very promising to tackle the challenges posed by the electronic scraps. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2013407 [article] Recycling of waste printed circuit boards by microwave - induced pyrolysis and featured mechanical processing [texte imprimé] / Jing Sun, Auteur ; Wenlong Wang, Auteur ; Zhen Liu, Auteur . - 2011 . - pp. 11763–11769. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11763–11769 Mots-clés : Recycling  waste  Pyrolysis Résumé : The combination of microwave-induced pyrolysis and mechanical processing is a promising way to recycle the waste printed circuit boards (WPCBs). In pyrolysis, WPCBs yield an average of 78.6 wt.% solid residues, 15.7 wt.% oil, and 5.7 wt.% gas. The solid residues are rich in metals; the oil is abundant with phenol and substituted phenols which can be reclaimed as chemicals or fuels; and the gas is combustible with a caloric value of 4504 kcal/m3. Our featured mechanical processing, including crushing and specially designed sink-float separation, is very suitable for metal reclamation from the pyrolysis residues. Over 99 wt.% of metals can be dissociated by the crushing step; the final recycling rate and grade of metals in the separation step can amount to 95 wt.% and 96.5%, respectively. The economic assessment reveals that the combined treatment is amazingly profitable and very promising to tackle the challenges posed by the electronic scraps. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2013407

Two - stage VPSA process for CO2 capture from flue gas using activated carbon beads / Chunzhi Shen in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5011–5021 Titre : Two - stage VPSA process for CO2 capture from flue gas using activated carbon beads Type de document : texte imprimé Auteurs : Chunzhi Shen, Auteur ; Zhen Liu, Auteur ; Ping Li, Auteur Année de publication : 2012 Article en page(s) : pp. 5011–5021 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Flue  gas  Vacuum  Swing  Adsorption Résumé : Carbon dioxide removal from flue gas with a two-stage vacuum pressure swing adsorption (VPSA) process, which uses activated carbon (AC) beads as the adsorbent, was investigated both theoretically and experimentally. First, single-column VPSA experiments were studied for CO2/N2 separation with high CO2 feed concentration. Then, a two-stage VPSA process composed two columns for each stage was designed, and the effects of different parameters were investigated. The first-stage VPSA unit operates with a four-step Skarstrom cycle, which includes feed pressurization, adsorption, blowdown, and counter-current purge with N2. For the second-stage VPSA process, a cycle with feed pressurization, adsorption, pressure equalization, blowdown and pressure equalization was employed. With the proposed two-stage VPSA process, a CO2 purity of 95.3% was obtained with 74.4% recovery. The total specific power consumption of the two-stage VPSA process is 723.6 kJ/kg-CO2, while the unit productivity is 0.85 mol-CO2/kg·h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202097y [article] Two - stage VPSA process for CO2 capture from flue gas using activated carbon beads [texte imprimé] / Chunzhi Shen, Auteur ; Zhen Liu, Auteur ; Ping Li, Auteur . - 2012 . - pp. 5011–5021. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5011–5021 Mots-clés : Flue  gas  Vacuum  Swing  Adsorption Résumé : Carbon dioxide removal from flue gas with a two-stage vacuum pressure swing adsorption (VPSA) process, which uses activated carbon (AC) beads as the adsorbent, was investigated both theoretically and experimentally. First, single-column VPSA experiments were studied for CO2/N2 separation with high CO2 feed concentration. Then, a two-stage VPSA process composed two columns for each stage was designed, and the effects of different parameters were investigated. The first-stage VPSA unit operates with a four-step Skarstrom cycle, which includes feed pressurization, adsorption, blowdown, and counter-current purge with N2. For the second-stage VPSA process, a cycle with feed pressurization, adsorption, pressure equalization, blowdown and pressure equalization was employed. With the proposed two-stage VPSA process, a CO2 purity of 95.3% was obtained with 74.4% recovery. The total specific power consumption of the two-stage VPSA process is 723.6 kJ/kg-CO2, while the unit productivity is 0.85 mol-CO2/kg·h. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202097y