The Experts below are selected from a list of 91266 Experts worldwide ranked by ideXlab platform
Diego C. Cafaro - One of the best experts on this subject based on the ideXlab platform.
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scheduling multipipeline blending systems supplying Feedstocks to crude oil distillation columns
Industrial & Engineering Chemistry Research, 2017Co-Authors: Jaime Cerda, Pedro C. Pautasso, Diego C. CafaroAbstract:Different types of crude oils, including heavy sour crudes, are usually processed in oil refineries. They are suitably mixed in multipipeline crude oil blending systems (MCOBS) to get qualified Feedstocks for the crude distillation units (CDUs) that separate them into various fractions or cuts. Current research on the scheduling of such refinery operations seeks to minimize the total operating cost while limiting the concentration of some impurities in the Feedstock. However, an essential property like the Feedstock composition usually approximated by the true boiling point (TBP) distribution curve is often ignored. In fact, one of the major goals of the blending process is to supply Feedstocks to the CDUs that consistently produce the desired proportions of final cuts to match refined product demands. This work introduces a novel slot-based mixed-integer nonlinear programming (MINLP) formulation for the MCOBS scheduling problem that explicitly accounts for the TBP curves of the crude oils to get a series...
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Scheduling Multipipeline Blending Systems Supplying Feedstocks to Crude Oil Distillation Columns
2017Co-Authors: Jaime Cerdá, Pedro C. Pautasso, Diego C. CafaroAbstract:Different types of crude oils, including heavy sour crudes, are usually processed in oil refineries. They are suitably mixed in multipipeline crude oil blending systems (MCOBS) to get qualified Feedstocks for the crude distillation units (CDUs) that separate them into various fractions or cuts. Current research on the scheduling of such refinery operations seeks to minimize the total operating cost while limiting the concentration of some impurities in the Feedstock. However, an essential property like the Feedstock composition usually approximated by the true boiling point (TBP) distribution curve is often ignored. In fact, one of the major goals of the blending process is to supply Feedstocks to the CDUs that consistently produce the desired proportions of final cuts to match refined product demands. This work introduces a novel slot-based mixed-integer nonlinear programming (MINLP) formulation for the MCOBS scheduling problem that explicitly accounts for the TBP curves of the crude oils to get a series of suitable and stable Feedstocks for the CDUs. An MILP-NLP solution strategy is proposed to find near-optimal schedules in reasonable CPU times
P. White - One of the best experts on this subject based on the ideXlab platform.
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Dedicated Energy Crops and Crop Residues for Bioenergy Feedstocks in the Central and Eastern USA
BioEnergy Research, 2016Co-Authors: R. B. Mitchell, V. Jin, J. Kiniry, A. Coffin, Marty R. Schmer, W F Anderson, Kipling S Balkcom, P. WhiteAbstract:Dedicated energy crops and crop residues will meet herbaceous Feedstock demands for the new bioeconomy in the Central and Eastern USA. Perennial warm-season grasses and corn stover are well-suited to the eastern half of the USA and provide opportunities for expanding agricultural operations in the region. A suite of warm-season grasses and associated management practices have been developed by researchers from the Agricultural Research Service of the US Department of Agriculture (USDA) and collaborators associated with USDA Regional Biomass Research Centers. Second generation biofuel Feedstocks provide an opportunity to increase the production of transportation fuels from recently fixed plant carbon rather than from fossil fuels. Although there is no “one-size-fits-all” bioenergy Feedstock, crop residues like corn ( Zea mays L.) stover are the most readily available bioenergy Feedstocks. However, on marginally productive cropland, perennial grasses provide a Feedstock supply while enhancing ecosystem services. Twenty-five years of research has demonstrated that perennial grasses like switchgrass ( Panicum virgatum L.) are profitable and environmentally sustainable on marginally productive cropland in the western Corn Belt and Southeastern USA.
Mandy Seerane - One of the best experts on this subject based on the ideXlab platform.
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capillary rheological studies of 17 4 ph mim Feedstocks prepared using a custom csir binder system
Powder Technology, 2018Co-Authors: Ronald Machaka, Phumlani Ndlangamandla, Mandy SeeraneAbstract:Abstract This paper reports on an attempt to establish the rheological properties of 17-4 PH stainless steel MIM Feedstocks prepared using a proprietary CSIR wax-based binder system. The influence of powder and Feedstock characteristics on the rheological properties of 17-4 PH stainless steel MIM Feedstocks were investigated using a capillary rheometer. The effects of bimodal powder distributions on the rheological properties were also studied. Three starting 17-4 PH stainless steel powder materials (5 μm, 15 μm, and − 45 μm) were used to formulate with five Feedstocks investigated in this work. Results are presented herein are discussed in terms of know Feedstock rheological characteristic parameters (flow behaviour index, activation energy, and high mouldability index). Effects of blending size distributions on Feedstock stability and mouldability are reported. Fine powder size distributions and their bimodal blends exhibit superior mouldability.
Shuquan Liang - One of the best experts on this subject based on the ideXlab platform.
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the rheology of metal injection molding
Journal of Materials Processing Technology, 2003Co-Authors: Baiyun Huang, Shuquan LiangAbstract:Abstract In this study, several readily available polymer binder systems were used to prepare Fe/Ni metal injection molding (MIM) Feedstock. A Banbury intensive mixer and screw extrusion were used to achieve optimized Feedstock, and the rheological properties of the resulting fluids were evaluated using a capillary rheometry. The effects of shear rate ( γ ), solid volume fraction ( φ ) and temperature ( T ) on the rheological behavior of the Fe/Ni MIM Feedstocks are discussed.
Baiyun Huang - One of the best experts on this subject based on the ideXlab platform.
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the rheology of metal injection molding
Journal of Materials Processing Technology, 2003Co-Authors: Baiyun Huang, Shuquan LiangAbstract:Abstract In this study, several readily available polymer binder systems were used to prepare Fe/Ni metal injection molding (MIM) Feedstock. A Banbury intensive mixer and screw extrusion were used to achieve optimized Feedstock, and the rheological properties of the resulting fluids were evaluated using a capillary rheometry. The effects of shear rate ( γ ), solid volume fraction ( φ ) and temperature ( T ) on the rheological behavior of the Fe/Ni MIM Feedstocks are discussed.
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viscosity and melt rheology of metal injection moulding Feedstocks
Powder Metallurgy, 1999Co-Authors: Y Li, Baiyun Huang, Xuanhui QuAbstract:AbstractFour kinds of Fe–2Ni metal injection moulding (MIM) Feedstocks with the same powder loading and with similar binder composition except for minor components were prepared and their viscosities at different temperatures and shear rates determined using a capillary rheometer. The flowability and the sensitivity of viscosity to shear rate and temperature were investigated. The viscosities of the binders and the general rheological indices of Feedstocks were compared. The results show that the minor components of the binders play a very important role in the rheology of Feedstocks. A Feedstock based on a PW–PP binder can not be used for injection moulding owing to severe powder/binder separation. A Feedstock based on a PW–EVA binder has the lowest viscosity and is the easiest to flow into the mould. The viscosity of a Feedstock based on a PW–EVA–HDPE binder is higher than that of a Feedstock based on the PW–EVA binder and is lower than that of a Feedstock based on a PW–HDPE binder. The general rheologi...
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viscosity and melt rheology of metal injection moulding Feedstocks
Powder Metallurgy, 1999Co-Authors: Y Li, Baiyun Huang, Xuanhui QuAbstract:AbstractFour kinds of Fe–2Ni metal injection moulding (MIM) Feedstocks with the same powder loading and with similar binder composition except for minor components were prepared and their viscosities at different temperatures and shear rates determined using a capillary rheometer. The flowability and the sensitivity of viscosity to shear rate and temperature were investigated. The viscosities of the binders and the general rheological indices of Feedstocks were compared. The results show that the minor components of the binders play a very important role in the rheology of Feedstocks. A Feedstock based on a PW–PP binder can not be used for injection moulding owing to severe powder/binder separation. A Feedstock based on a PW–EVA binder has the lowest viscosity and is the easiest to flow into the mould. The viscosity of a Feedstock based on a PW–EVA–HDPE binder is higher than that of a Feedstock based on the PW–EVA binder and is lower than that of a Feedstock based on a PW–HDPE binder. The general rheologi...
