Retrofitting for DME process by energy-flow framework diagram

Zheng, Danxing; Cao, Wen

doi:10.1016/j.cep.2006.03.018

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…Distillation columns were already available in the analyzed plant and their dimensions and characteristics coincided with the planned ones. The objective function-annual profit (Equation (35)) that represents the difference between all incomes and all expenses on an annual basis, was chosen as the optimization criterion. It is formed under conditions of continuous and discrete variables by equations (Equation (36))-(Equation (40)).…”

Section: Mathematical Modellingmentioning

confidence: 99%

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The Reconstruction Technique of Multi-Product Production and MINLP Mathematical Modelling

Hosnar¹,

Kovač-Kralj²

2015

MSCE

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Low efficiency, negative impacts on the environment and non-profitable operations are the main shortcomings of outdated industrial processes. Such systems can be reconstructed and improved in the direction of multi-product operations. The study of this article focuses on the development of a method for multi-product operations by reconstructing outdated industrial processes. This article contains the theory of a developed method that enables the updating of existing process units and integrated systems on the basis of reconstruction scenarios and pathways. The goals of the set out method are: 1) to maintain the existing process units and chemical plants to a greater extent, 2) to enable the potential for finding new process alternatives and technological solutions, 3) to provide a streamlined operation for all subsystems and total systems, 4) to promote environmental and social responsibilities, and 5) to apply the concept of the presented reconstruction method to non-profitable industrial processes. In regard to multi-product operations, a conceptual model is a suitable tool for the reconstruction of industrial processes. It connects several software tools and so enables quick decision-making between process alternatives. A reconstruction method provides foresight into the possible improvements to existing industrial processes. In comparison with the indirect synthesis of DME (simple reconstruction pathway), the lower operating costs from the direct synthesis of DME (complex reconstruction pathway) were confirmed.

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Section: Mathematical Modellingmentioning

confidence: 99%

“…The alternative process scheme F (Appendix VII) represents a synthesis process a pressure of 50 bar and a temperature of 270˚C. Mentioned process scheme was further examined by the authors [35].…”

Section: Direct Synthesis Of Dme and A Review Of The Process Alternatmentioning

confidence: 99%

The Reconstruction Technique of Multi-Product Production and MINLP Mathematical Modelling

Hosnar¹,

Kovač-Kralj²

2015

MSCE

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“…A feature of both graphical analyses is that it is easy to show the input and output relations of the energy balance and give a quantitative description of the energy flow as well as a complete concept of the system energy flow structure. Besides, based on these two graphical analysis methods, Zheng proposed another graphic tool named EFD (Energy-flow Framework Diagram) for the exergy analysis . EFD describes the utilization of energy based on the concept of node and flow.…”

Section: Introductionmentioning

confidence: 99%

“…Besides, based on these two graphical analysis methods, Zheng proposed another graphic tool named EFD (Energy-flow Framework Diagram) for the exergy analysis. 18 EFD describes the utilization of energy based on the concept of node and flow. In addition, it describes the energy transfer and exergy loss between internal systems and utilities.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Low-Rank-Coal-Based Oxygen-Thermal Acetylene Manufacturing Process System

Guo

Zheng

2012

Ind. Eng. Chem. Res.

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In this paper, the low-rank-coal-based oxygen-thermal method acetylene manufacturing process is established and simulated. Through the novel graphic analysis tool EFGD (Exergy-flow Framework Grassman Diagram), the energy supply and demand, the energy utilization, and energy consumption distribution are therefore obtained. Results show that the carbide furnace unit is the largest exergy loss unit, and its internal exergy loss accounts for 57.52% of the total internal exergy loss, reducing carbon consumption in a carbide furnace and reusing the off-gas will do better to improve the energy consumption of the whole system. Moreover, to further investigate the thermodynamic mechanism of energy coupling and energy conversion as well as the cause of high energy consumption, the energy configuration with ΔG-T and the α-H-ε diagram analysis is established. It reveals that the carbon combustion reaction in oxygen for CO production plays a major role in promoting the reaction for this process.

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Energy and exergy analysis of a new calcium carbide production process

et al. 2022

Fuel Processing Technology

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Retrofitting for DME process by energy-flow framework diagram

Cited by 4 publications

References 9 publications

The Reconstruction Technique of Multi-Product Production and MINLP Mathematical Modelling

The Reconstruction Technique of Multi-Product Production and MINLP Mathematical Modelling

Thermodynamic Analysis of Low-Rank-Coal-Based Oxygen-Thermal Acetylene Manufacturing Process System

Energy and exergy analysis of a new calcium carbide production process

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