Integrating purifiers in refinery hydrogen networks: a retrofit case study

Liao, Zuwei; Wang, Jingdai; Yang, Yongrong; Rong, G.

doi:10.1016/j.jclepro.2009.10.011

Cited by 118 publications

(68 citation statements)

References 24 publications

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“…Khajehpour et al [2] proposed objective functions that minimize waste flows containing hydrogen and reduce hydrogen production. Liao et al [10] used relations for compressors and purifiers to solve the mixed-integer nonlinear programming (MINLP) model obtained from the network structure to minimize the total annual cost.…”

Section: Background and Previous Work On Hydrogen Managementmentioning

confidence: 99%

“…The cost of this process can be significantly lower than for buying or producing hydrogen [3]. Various studies have been performed on the management of hydrogen networks with purifiers and hydrogen recovery from off-gases [3,8,10,13,14]. These studies normally emphasize the purifiers' design and/or provide mathematical models of purifiers in hydrogen networks.…”

Section: Background and Previous Work On Hydrogen Managementmentioning

confidence: 99%

“…Peramanu et al [15] evaluated the economic performance of different purification processes for off-gases. Liao et al developed a systematic approach that provides more network structure possibilities for the placement of compressors and purifiers [10]. Zhang et al [16] developed an ensuing graphical method for targeting the pinch point and minimum utility consumption of the hydrogen system with purification reuse.…”

Section: Background and Previous Work On Hydrogen Managementmentioning

confidence: 99%

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Off‐Gases Optimization in a Hydrogen Network Refinery

Birjandi

Shahraki

2011

Chem Eng & Technol

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For optimization of a hydrogen network, a steam reformer is associated to the feedstock and linear programming (LP) is applied. The investigated network consists of one steam reformer and two feedstocks. By exerting LP and the mentioned association, total annual cost decreasing is achieved in a case study in which natural gas and off-gas were considered as feedstocks. The optimization problems of the hydrogen network comprise the hydrogen network retrofit design and the feedstock selection with respect to their cost. Nonlinear programming (NLP) and mixed-integer nonlinear programming (MINLP) models are developed for optimization based on a two-case study: for the first one, an existent optimization method on hydrogen networks is investigated and for the second one, revision of a recent optimization method on hydrogen networks associated by an LP model in the steam reformer unit is applied. These two cases resulted in total annual cost reductions of 34 % and 45.9 %, respectively.

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Section: Background and Previous Work On Hydrogen Managementmentioning

confidence: 99%

Section: Background and Previous Work On Hydrogen Managementmentioning

confidence: 99%

Section: Background and Previous Work On Hydrogen Managementmentioning

confidence: 99%

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Off‐Gases Optimization in a Hydrogen Network Refinery

Birjandi

Shahraki

2011

Chem Eng & Technol

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“…They considered the trade-offs between hydrogen saving, cost of compressors and capital investment to build a superstructure-model including possible purification scenarios. Liao et al (Liao et al 2010) presented a systematic approach for the integration of hydrogen networks with purifiers. Later, they (Liao et al 2011a) developed a rigorous targeting approach with the pinch insight combined.…”

Section: Introductionmentioning

confidence: 99%

MILP Model for the Nonlinear Problem of Optimal Purifier Placement

Lou

Liao

Wang

et al. 2017

Process Integr Optim Sustain

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In the refinery, purifiers are widely used in the recovery of hydrogen components of the emissions from hydrogen consumption units. Hydrogen network containing purification units have been optimized and integrated by lots of researchers. However, purifier models such as PSA, membrane separation have nonlinear characteristics. Even if minimizing hydrogen utility, mathematical programming models adopted by most of the researchers belong to the non-convex and nonlinear models, not guaranteeing global optimal solution. On the basis of previous studies, this paper proposes a mixed integer linear programming model to obtain a minimum hydrogen utility consumption. This method can get the inlet flowrate simultaneously. Case studies indicate that this method is effective for both hydrogen and water networks.

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“…-Minimum of total annual cost (Zhou et al 20 , Liao et al 21 ) -Minimum consumption of fresh hydrogen (Liao et al 22 ) -Minimum amount of hydrogen sent to the fuel system (Khajehpour et al 23 ) -Minimum energy required to operate compressor and hydrogen network (Wu et al 24 ). The choice of the objective function depends on the model and its limitations.…”

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confidence: 99%

Integration of Hydrogen Systems in Petroleum Refinery

Matijašević

Petrić

2016

Chem.Biochem.Eng.Q.

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Considering the importance of hydrogen in crude oil refining, it is necessary to ensure its most efficient use to satisfy refinery hydrogen requirements. Effective hydrogen management provides maximum utilization of hydrogen. The mass balance of streams containing hydrogen plays a key role in addressing the hydrogen-network optimization problem. The purpose of this work was to analyze the refinery hydrogen network, composed of hydrogen sources and sinks. Mass integration principles and techniques have been applied in the optimization of the refinery hydrogen network.The methodology of hydrogen network integration is presented in a case study of a local petroleum refinery. The main objectives are to provide different solutions for reducing the amount of hydrogen not properly used in the local refinery and which is mostly sent to the fuel system, as well as the operating costs. Hydrogen pinch analysis is applied for targeting the minimum hydrogen consumption of the hydrogen system. A superstructure-based mathematical model of the hydrogen network is developed to minimize the total operating costs. The non-linear programming optimization problem is solved by using optimization software GAMS. An additional hydrogen purification unit is introduced in the existing hydrogen network and the effect on the overall network is investigated. Network design with two hydrogen purification units has proved to be an optimal solution, with respect to the chosen objective function. These analyses and their results can assist the refinery to reduce and improve the efficiency of hydrogen management. The analyses covered only the existing equipment without additional investment.

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Integrating purifiers in refinery hydrogen networks: a retrofit case study

Cited by 118 publications

References 24 publications

Off‐Gases Optimization in a Hydrogen Network Refinery

Off‐Gases Optimization in a Hydrogen Network Refinery

MILP Model for the Nonlinear Problem of Optimal Purifier Placement

Integration of Hydrogen Systems in Petroleum Refinery

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