A simplified and general approach to absorption and stripping with parallel streams

Meirelles, Antônio José de Almeida; Biasi, Lilian Caroline Kramer; Batista, Fábio Roberto de Souza; Batista, Eduardo Augusto Caldas

doi:10.1016/j.seppur.2018.04.004

Cited by 8 publications

(16 citation statements)

References 13 publications

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“…Examples References Regenerate • Food production associating plantation or cattle raising with agro forestry [48] • Integration of carbon capture and food/biomass production [49] • Use of alternative proteins in food formulation [50] Share • Shared food manufacturing facilities [51] • Food-sharing platforms to share surplus food [52] • Shared practices in food waste management [53] Optimize • Energetic optimization in food processes [54,55] • Food production optimization with minimization of food losses [56] • Technologies to increase traceability and decrease food losses [57] Loop • Returnable packages technologies and management [58,59] • Reutilization of food residues for production of other non-food materials, including biofuels [35,[60][61][62][63] • Extraction of bioactive compounds from food residues [64] • Extraction of macronutrients from food residues [65] Virtualise • Online food shopping technologies [66] • Food formulation using virtual reality [67] • Use of GIS (Geographical Information System), big data, and other 4.0 Industry technologies to monitor food chain, avoiding losses and increasing quality [68][69][70][71][72][73] Exchange • Replacement of non-renewable solvents or other feedstock by renewable/more sustainable chemicals for food production [74] • Food formulation by 3D printing [75] • Replacement of non-renewable energy sources by renewable ones in food processes [76]…”

Section: Resolve Actionmentioning

confidence: 99%

Circular Economy in the Food Chain: Production, Processing and Waste Management

Gonçalves

Máximo

2022

Circ.Econ.Sust.

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Food processing, from agricultural production to domestic consumption, is responsible for generating great amounts of waste per year, resulting in soil, water, and air pollution. These pollutants, together with the uses of petrochemical process inputs such as solvents, additives, or fuels, increase the food chain’s environment impacts resulting in wasted resources. In response to this scenario, the circular economy (CE) theory is presented in literature as a liable alternative for the design of more sustainable production chains. In this context, this work was aimed at evaluating the literature’s approach on the CE concept within the food processing and food waste management. The works show the centrality of “food waste” as a focus for the application of the CE. However, despite the relevance of management, reuse, or valuation of food waste, particularly due to its contribution to carbon footprint and decrease of food safety, studies have found other strategies for improvement of CE in the food chain. In this case, works in literature were allocated within the framework presented by the Ellen Macarthur Foundation called ReSOLVE, with proposals for modification of production chain to promote the CE. Among the proposals, one should highlight: modification of productive systems for mitigation of environmental impacts and greenhouse emissions, processes optimization for decreasing the use of natural resources and wastes, use of 4.0 Industry such as IoT, big data, or machine learning techniques for improvement of the whole supply chain, development of collaborative platforms for production and market, use of residues or co-products by design of intra- or inter-chain loops, and exchange of process or inputs with high environmental impacts for greener ones.

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Section: Resolve Actionmentioning

confidence: 99%

Circular Economy in the Food Chain: Production, Processing and Waste Management

Gonçalves

Máximo

2022

Circ.Econ.Sust.

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“…As indicated below, realizations of periodic cycling do not rely on liquid flow characteristics and could therefore be a more effective means of realization. A column system that benefits from the Lewis case 2 effect, using continuous non-periodic operation with horizontal liquid flow, is known as parastillation . Equipment for parastillation realizations can be developed into elaborate column systems with multiple partitions of vapor flow.…”

Section: Introductionmentioning

confidence: 99%

Modeling Drainage in Periodic Separation

Abildskov

Jørgensen

2022

Ind. Eng. Chem. Res.

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Simple models are developed for realistic operation modes of periodic separation. The models comprise instantaneous, simultaneous, and sequential draining. Using our models, the influence of a finite drainage time on separation performance is investigated. Linear case systems are modeled for stationary profiles for both simultaneous and sequential liquid drainage. Performance measures, such as tray efficiencies and mass transfer, are compared for different cases using a consistent modeling framework. We find that draining periods − in general − should be minimized, irrespective of the operating mode. For columns with a few stages, the simultaneous draining is most efficient. With a few stages, the differences are negligible. For higher numbers of stages, the sequential draining becomes superior, partially due to the enabling of mass transfer during draining. Two detailed study cases are provided.

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“…In order to improve the ethanol productivity, an alternative approach is that the ethanol could be continuously and efficiently removed from the fermentation feed. Pervaporation as a membrane separation process is an attractive technique in terms of energy and cost efficiency as compared with broadly utilized separation methods (such as distillation and gas stripping) [4,5]. This process allows desirable components to preferentially permeate through a membrane impulse driven by a difference in chemical potentials.…”

Section: Introductionmentioning

confidence: 99%

Modified Silica Incorporating into PDMS Polymeric Membranes for Bioethanol Selection

Peng

Lan

Luo

2019

Advances in Polymer Technology

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In this work, polydimethylsiloxane (PDMS) polymeric membranes were fabricated by incorporating fumed silica nanoparticles which were functionalized with two silane coupling agents—NH2(CH2)3Si(OC2H5)3(APTS) and NH2(CH2)2NH(CH2)3Si(OC2H5)3(TSED)—for selective removal of ethanol from aqueous solutions via pervaporation. It was demonstrated that large agglomerates were not observed indicating the uniform distribution of modified silica throughout the PDMS matrices. It is noted that the ethanol diffusivity and the water contact angles were both increased remarkably, being beneficial to the preferential permeation of ethanol through the membranes. The pervaporation results showed that the addition of the two types of modified silica nanoparticles dramatically enhanced both the permeability and selectivity of hybrid membranes. Compared to APTS, silica modified by TSED at the concentration of 4 wt. % resulted in the optimum pervaporation membranes with the maximum separation factor of 12.09 and the corresponding permeation flux of approximately 234.0 g·m−2·h−1in a binary aqueous mixture at 40°C containing 10 wt. % ethanol. The observation will benefit the choice of coupling agents to improve the compatibility between hydrophilic fillers and hydrophobic polymers in preparing mixed matrix membranes.

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A simplified and general approach to absorption and stripping with parallel streams

Cited by 8 publications

References 13 publications

Circular Economy in the Food Chain: Production, Processing and Waste Management

Circular Economy in the Food Chain: Production, Processing and Waste Management

Modeling Drainage in Periodic Separation

Modified Silica Incorporating into PDMS Polymeric Membranes for Bioethanol Selection

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