Graphic synthesis method for multi-technique integration separation sequences of multi-input refinery gases

Ruan, Xuehua; Xiao, Hongyan; Jiang, Xiaobin; Yan, Xiaoming; Dai, Yan; He, Gaohong

doi:10.1016/j.seppur.2018.04.082

Cited by 13 publications

(10 citation statements)

References 49 publications

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“…Heavy fuel oils and refinery fuel gas represented the majority of fuels used in both cases [19,20]. The scheduling of a fuel gas network represents a challenge for a refinery due to both its multiple sources and its variable composition [21,22], as well as its variable production and demand [23,24]. The flexibility to switch between various types of fuel consumed seems to be an attractive economic route to deal with this challenge [25,26].…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

et al. 2019

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This study of process heat source change in industrial conditions has been developed to aid engineers and energy managers with working towards sustainable production. It allows for an objective assessment from energetic, environmental, and economic points of view, thereby filling the gap in the systematic approach to this problem. This novel site-wide approach substantially broadens the traditional approach, which is based mostly on “cheaper” and “cleaner” process heat sources’ application and only takes into account local changes, while neglecting the synergic effect on the whole facility’s operations. The mathematical model employed assesses the performance change of all the affected refinery parts. The four proposed aromatic splitting process layouts, serving as a case study, indicate feasible heat and condensate conservation possibilities. Although the estimated investment needed for the most viable layout is over €4.5 million, its implementation could generate benefits of €0.5–1.5 million/year, depending on the fuel and energy prices as well as on the carbon dioxide emissions cost. Its economics is most sensitive to the steam to refinery fuel gas cost ratio, as a 10% change alters the resulting benefit by more than €0.5 million. The pollutant emissions generated in the external power production process contribute significantly to the total emissions balance.

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Section: Introductionmentioning

confidence: 99%

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

et al. 2019

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“…Figure 16 shows the optimum number of plates for the absorber column. If place 10 plates in the absorber column can get negligible LPG losses, which will certainly improve the percent recovery [18,19]. Figure 17 case study concludes that if no of the trays in the absorber unit is lea than 10 plates, then adequate losses of LPG will occur in the column.…”

Section: Process Flow Diagram Of Absorption Techniquementioning

confidence: 98%

“…Water, the most normal liquid, begins bubbling at 20 o C if the absolute pressure is 2.3 kN/m 2 . For a 47.5 kN/m 2 absolute pressure of, the water begins bubbling at 80 o C and 101.3 kN/m 2 (typical climate), the bubbling beginnings at 100 o C [3,6,7,19].…”

Section: Equipment Designing Of Centrifugal Pumpmentioning

confidence: 99%

Simulation of Liquefied Petroleum Gas Recovery from Off Gases in a Fuel Oil Refinery

Qamar¹,

Mushtaq²,

Ullah³

et al. 2020

ARFMTS

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With the growing need and demand for petroleum fuels in the industrial, automotive and domestic sectors, it has become the need of time to address this problem. The important question is, what engineers can do in this regard. There is a simple solution to cater this problem, the production trends worldwide are increasing every year, but still, the demand keeps increasing exponentially. One way is to stress emphasis on reducing the wastage of these precious fuels and, at the same time, implement methodologies and techniques to recover these. The research caters to cope up with the shortage of LPG within Pakistan. Since LPG is a fuel that is being used in the industrial, automotive as well as domestic sector, adequate responsive measures should be taken to meet the market requirements. This research focuses on the technique to recover LPG from refinery off-gases. Since off-gases usually are flared of by most of the refineries leading to potential loss of lighter end fuels like LPG. The article encloses a detailed proposal of a recovery plant that makes use of simple techniques and efficient process accompanied by economical and feasible solutions.

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“…Mathematical programming methods and intelligent algorithms for separation sequence synthesis, such as the mixed integer nonlinear programming (MINLP) model and genetic algorithm (GA), are too complex and difficult to calculate the optimal sequence because professional mathematics skills are required. Thus, a graphic synthesis method presents an opportunity to save equipment investment and operation costs by sharing equipment and facilities, along with saving time and effort in synthesis, thereby ensuring better separation sequences [30].…”

Section: Introductionmentioning

confidence: 99%

Design and Economic Evaluation of a Hybrid Membrane Separation Process from Multiple Refinery Gases Using a Graphic Synthesis Method

et al. 2022

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Petrochemical tail gases have various components and many separation methods, thus there are many possible design schemes, making it difficult to determine the optimal scheme. In this work, a graphic synthesis method was used to design a hybrid multi-input refinery gas separation process consisting of membranes, pressure swing adsorption (PSA), shallow condensation (SC), and distillation units for the production of valuable products which include H2, C2, LPG, and C5+. Ten refinery gases with different compositions were visualized and represented with vector couples in a triangular coordinate system. Firstly, according to the characteristics of the refinery gases, the feeds located in the same region of the triangular coordinate system were merged to simplify the number of input streams, then ten original input streams were combined into two mixed streams. Secondly, the optimal separation sequence was determined by using the unit selection rules of a graphic synthesis method. Thirdly, the process was simulated in UniSim Design and the process parameters were determined by sensitivity analysis. Finally, economic assessments were carried out, which led to an annual gross product profit of USD 38.62 × 106 and a payback period of less than 4 months.

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Graphic synthesis method for multi-technique integration separation sequences of multi-input refinery gases

Cited by 13 publications

References 49 publications

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

An Investigation of the Techno-Economic and Environmental Aspects of Process Heat Source Change in a Refinery

Simulation of Liquefied Petroleum Gas Recovery from Off Gases in a Fuel Oil Refinery

Design and Economic Evaluation of a Hybrid Membrane Separation Process from Multiple Refinery Gases Using a Graphic Synthesis Method

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