The Experts below are selected from a list of 126777 Experts worldwide ranked by ideXlab platform
Christodoulos A Floudas - One of the best experts on this subject based on the ideXlab platform.
-
Simultaneous Process synthesis heat power and water integration of thermochemical hybrid biomass coal and natural gas facilities
Computers & Chemical Engineering, 2012Co-Authors: Richard C Aliba, Josephine A Elia, Christodoulos A FloudasAbstract:Abstract A comprehensive wastewater network is introduced into a thermochemical based Process superstructure that will convert biomass, coal, and natural gas to liquid (CBGTL) transportation fuels. The mixed-integer nonlinear optimization (MINLP) model includes Simultaneous heat, power, and water integration that utilizes heat engines to recover electricity from waste heat and several treatment units to Process and recycle wastewater. A total of 108 case studies are analyzed which consist of combinations of six coal feedstocks, three biomass feedstocks, three plant capacities, and two Process superstructures. This study discusses important Process topological differences between the case studies and illustrates each component of the Process synthesis framework using the two medium-sized capacity case studies that have low-volatile bituminous coal and biomass feedstocks.
-
optimization framework for the Simultaneous Process synthesis heat and power integration of a thermochemical hybrid biomass coal and natural gas facility
Computers & Chemical Engineering, 2011Co-Authors: Richard C Baliban, Josephine A Elia, Christodoulos A FloudasAbstract:Abstract A thermochemical based Process superstructure and its mixed-integer nonlinear optimization (MINLP) model are introduced to convert biomass (switchgrass), coal (Illinois #6), and natural gas to liquid (CBGTL) transportation fuels. The MINLP model includes Simultaneous heat and power integration utilizing heat engines to recover electricity from the Process waste heat. Four case studies are presented to investigate the effect of CO 2 sequestration (CCS) and greenhouse gas (GHG) reduction targets on the Process topology along with detailed parametric analysis on the role of biomass and electricity prices. Topological similarities for the case studies include selection of solid/vapor-fueled gasifiers and iron-catalyzed Fischer-Tropsch units that facilitate the reverse water–gas-shift reaction. The break-even oil price was found to be $57.16/bbl for CCS with a 50% GHG reduction, $62.65/bbl for CCS with a 100% GHG reduction, $82.68/bbl for no CCS with a 50% GHG reduction, and $91.71 for no CCS with a 100% GHG reduction.
Jun Komotori - One of the best experts on this subject based on the ideXlab platform.
-
Effect of Simultaneous surface modification Process on wear resistance of martensitic stainless steel
Journal of Materials Processing Technology, 2009Co-Authors: Shoichi Kikuchi, Atsushi Sasago, Jun KomotoriAbstract:In order to improve the wear resistance of martensitic stainless steel, a surface treatment system was developed that combines high-frequency induction heating (IH) with fine particle peening (FPP). In this system, a compressed air spray from the FPP nozzle rapidly cools the specimen surface, which is heated by the IH system. The specimen surface can be Simultaneously modified by work hardening and quenching. Vickers hardness and retained austenite measurements were conducted to characterize the surface-modified layer generated by the developed Process. Surface microstructures were also observed by scanning electron microscopy (SEM) and optical microscopy. The Process created a surface with a high hardness and an extremely fine-grained microstructure. The fine-grained microstructure was generated by dynamic recrystallization. The Process reduced the amount of retained austenite in the surface layer because it increased the precipitated chromium carbide content. Reciprocating sliding wear tests were conducted to evaluate the wear resistance of the surface. The specimen modified by the developed Process exhibited higher wear resistance than specimens that had only been quenched. This implies that the developed Simultaneous Process can significantly improve the wear resistance of steel surfaces.
Josephine A Elia - One of the best experts on this subject based on the ideXlab platform.
-
Simultaneous Process synthesis heat power and water integration of thermochemical hybrid biomass coal and natural gas facilities
Computers & Chemical Engineering, 2012Co-Authors: Richard C Aliba, Josephine A Elia, Christodoulos A FloudasAbstract:Abstract A comprehensive wastewater network is introduced into a thermochemical based Process superstructure that will convert biomass, coal, and natural gas to liquid (CBGTL) transportation fuels. The mixed-integer nonlinear optimization (MINLP) model includes Simultaneous heat, power, and water integration that utilizes heat engines to recover electricity from waste heat and several treatment units to Process and recycle wastewater. A total of 108 case studies are analyzed which consist of combinations of six coal feedstocks, three biomass feedstocks, three plant capacities, and two Process superstructures. This study discusses important Process topological differences between the case studies and illustrates each component of the Process synthesis framework using the two medium-sized capacity case studies that have low-volatile bituminous coal and biomass feedstocks.
-
optimization framework for the Simultaneous Process synthesis heat and power integration of a thermochemical hybrid biomass coal and natural gas facility
Computers & Chemical Engineering, 2011Co-Authors: Richard C Baliban, Josephine A Elia, Christodoulos A FloudasAbstract:Abstract A thermochemical based Process superstructure and its mixed-integer nonlinear optimization (MINLP) model are introduced to convert biomass (switchgrass), coal (Illinois #6), and natural gas to liquid (CBGTL) transportation fuels. The MINLP model includes Simultaneous heat and power integration utilizing heat engines to recover electricity from the Process waste heat. Four case studies are presented to investigate the effect of CO 2 sequestration (CCS) and greenhouse gas (GHG) reduction targets on the Process topology along with detailed parametric analysis on the role of biomass and electricity prices. Topological similarities for the case studies include selection of solid/vapor-fueled gasifiers and iron-catalyzed Fischer-Tropsch units that facilitate the reverse water–gas-shift reaction. The break-even oil price was found to be $57.16/bbl for CCS with a 50% GHG reduction, $62.65/bbl for CCS with a 100% GHG reduction, $82.68/bbl for no CCS with a 50% GHG reduction, and $91.71 for no CCS with a 100% GHG reduction.
Shoichi Kikuchi - One of the best experts on this subject based on the ideXlab platform.
-
Effect of Simultaneous surface modification Process on wear resistance of martensitic stainless steel
Journal of Materials Processing Technology, 2009Co-Authors: Shoichi Kikuchi, Atsushi Sasago, Jun KomotoriAbstract:In order to improve the wear resistance of martensitic stainless steel, a surface treatment system was developed that combines high-frequency induction heating (IH) with fine particle peening (FPP). In this system, a compressed air spray from the FPP nozzle rapidly cools the specimen surface, which is heated by the IH system. The specimen surface can be Simultaneously modified by work hardening and quenching. Vickers hardness and retained austenite measurements were conducted to characterize the surface-modified layer generated by the developed Process. Surface microstructures were also observed by scanning electron microscopy (SEM) and optical microscopy. The Process created a surface with a high hardness and an extremely fine-grained microstructure. The fine-grained microstructure was generated by dynamic recrystallization. The Process reduced the amount of retained austenite in the surface layer because it increased the precipitated chromium carbide content. Reciprocating sliding wear tests were conducted to evaluate the wear resistance of the surface. The specimen modified by the developed Process exhibited higher wear resistance than specimens that had only been quenched. This implies that the developed Simultaneous Process can significantly improve the wear resistance of steel surfaces.
Z D Xiang - One of the best experts on this subject based on the ideXlab platform.
-
formation of hard surface layer on austenitic stainless steels via Simultaneous chromising and nitriding by pack cementation Process
Applied Surface Science, 2012Co-Authors: Dan Li Zeng, Shu Qi Yang, Z D XiangAbstract:Abstract This study aims to increase surface hardness of austenitic stainless steels via Simultaneous chromising and nitriding by the pack cementation Process. The pack powder mixtures used for the Process consisted of Cr2N as a source of both N and Cr for the Simultaneous Process, NH4Cl as activator and Al2O3 as inert filler; in some cases, Cr powder was added as an additional source for depositing Cr. The AISI204 austenitic stainless steel is studied as a substrate. It is demonstrated that a top Cr2N layer with a Cr enriched layer underneath can be formed on the steel surface at 1100 °C. Hardness values of more than 1800 HV are obtained at the outermost surface of the treated specimen. It has been shown that the hardness profile at the cross-section of the surface depends on the pack chemistry.