ENERGY EFFICIENCY IMPROVEMENT FOR NATURAL GAS LIQUIDS DIRECT-SPLITTER-DIRECT SEQUENCE FRACTIONATION UNIT

2016 ◽  
Vol 78 (6-12) ◽  
Author(s):  
Ahmad Nafais Rahimi ◽  
Mohd. Faris Mustafa ◽  
Muhammad Zakwan Zaine ◽  
Norazana Ibrahim ◽  
Kamarul Asri Ibrahim ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Driving Force ◽  
Energy Analysis ◽  
Direct Sequence ◽  
Sequence Determination ◽  
Optimal Sequence ◽  
Distillation Columns ◽  
Force Method ◽  
Energy Efficiency Improvement ◽  
Fractionation Unit

The objective of this paper is to present the study and analysis of the energy saving improvement for the NGLs Direct-Splitter-Direct fractionation sequence plant by using driving force method. To perform the study and analysis, the energy efficient distillation columns (EEDCs) methodology is developed. Basically, the methodology consists of four hierarchical steps; Step 1: Existing Sequence Energy Analysis, Step 2: Optimal Sequence Determination, Step 3: Optimal Sequence Energy Analysis, and Step 4: Energy Comparison. The capability of this methodology is tested in designing an optimal energy efficient direct-splitter-direct sequence of NGLs fractionation unit. The results show that the maximum of 10.62 % energy reduction was able to achieve by changing the sequence suggested by the driving force method. It can be concluded that, the sequence determined by the driving force method is able to reduce energy used for a NGLs fractionation. All of this findings show that the methodology is able to design energy efficient for NGLs fractionation sequence in an easy, practical and systematic manner.

ENERGY EFFICIENT DISTILLATION COLUMNS ANALYSIS FOR AN AROMATIC SEPARATION PROCESS

2016 ◽  
Vol 78 (3-2) ◽  
Author(s):  
Muhammad Zakwan Zaine ◽  
Mohd. Faris Mustafa ◽  
Onn Hassan ◽  
Kamarul Asri Ibrahim ◽  
Norazana Ibrahim ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Driving Force ◽  
Energy Savings ◽  
Energy Analysis ◽  
Optimal Sequence ◽  
Separation Unit ◽  
Distillation Columns ◽  
Improve Energy Efficiency ◽  
Force Method

Energy savings is a major challenge in distillation operations. However, there is still one problem, which is how do we improve the energy efficiency of the existing distillation column systems without major modifications. Recently, a new energy efficient distillation columns methodology that will be able to improve energy efficiency of the existing separation systems without having major modifications has been developed. Therefore, the objective of this paper is to present a new improvement of the existing methodology by designing an optimal sequence of energy efficient distillation columns using a driving force method. Accordingly, the methodology is divided into four hierarchical sequential stages: i) existing sequence energy analysis, ii) optimal sequence determination, iii) optimal sequence energy analysis, and iv) energy comparison and economic analysis. The capability of this methodology is tested in designing an optimal synthesis of energy efficient distillation columns sequence of an aromatics separation unit. The existing aromatics separation unit consists of six compounds (Methylcyclopentane (MCP), Benzene, Methylcyclohexane (MCH), Toluene, m-Xylene and o-Xylene) with five direct sequence distillation columns being simulated using a simple and reliable short-cut method and rigorously tested within an Aspen HYSYS® simulation environment. The energy and economic analyses show that the optimal sequence determined by the driving force method has a better energy reduction with a total of 6.78% energy savings and a return of investment of 3.10 with a payback period of 4 months. It can be concluded that, the sequence determined by the driving force method is not only capable in reducing energy consumption, but also has a better economic cost for an aromatic separation unit

scholarly journals Optimal Synthesis of Energy Efficient Distillation Columns Sequence Using Driving Force Method

2015 ◽  
Vol 9 (7) ◽  
pp. 154
Author(s):  
Ahmad Nafais Rahimi ◽  
Mohd. Faris Mustafa ◽  
Muhammad Zakwan Zaine ◽  
Norazana Ibrahim ◽  
Kamarul Asri Ibrahim ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Driving Force ◽  
Distillation Column ◽  
Energy Analysis ◽  
Separation Process ◽  
Hydrocarbon Mixture ◽  
Optimal Sequence ◽  
Distillation Columns ◽  
Force Method ◽  
Mixture Separation

This paper presents the study of the optimal synthesis of energy efficient distillation columns (EEDCs) sequenceby using the driving force method. In order to perform the study and analysis, the EEDCs sequence methodologyhas been developed. Accordingly, the methodology consists of four hierarchical sequential steps; Step 1: ExistingSequence Energy Analysis, Step 2: Optimal Sequence Determination, Step 3: Optimal Sequence Energy Analysis,and Step 4: Energy Comparison. The capability of this methodology has been tested in designing minimumenergy distillation column sequence for hydrocarbon mixture separation process. The results show that themaximum of 39.6 % energy reduction was able to achieve by changing the sequence suggested by the drivingforce method. It can be concluded that, the sequence determined by the driving force method is able to reduceenergy requirement for hydrocarbon mixture separation process. All of this findings show that the methodologyis able to design minimum energy distillation column sequence for hydrocarbon mixture separation process in aneasy, practical and systematic manner.

SUSTAINABLE ENERGY EFFICIENCY DISTILLATION COLUMNS SEQUENCE DESIGN OF AROMATIC SEPARATION UNIT

2016 ◽  
Vol 78 (6-12) ◽  
Author(s):  
Muhammad Zakwan Zaine ◽  
Mohd. Faris Mustafa ◽  
Kamarul Asri Ibrahim ◽  
Norazana Ibrahim ◽  
Mohd. Kamaruddin Abd. Hamid
Keyword(s):  
Energy Efficiency ◽  
Energy Efficient ◽  
Driving Force ◽  
Sustainable Energy ◽  
Optimal Sequence ◽  
Design Modification ◽  
Separation Unit ◽  
Distillation Columns ◽  
Force Method ◽  
Sustainability Analysis

Distillation operations became a major concern within sustainability challenge, which it becomes a primary target of energy saving efforts in industrially developed countries. However, there is still one problem, which is how do we improve the energy efficiency of the existing distillation columns systems by considering the sustainability criteria without having major modifications. Therefore, the objective of this paper is to present new improvement of existing methodology by including a sustainability analysis to design an optimal sequence of energy efficient distillation columns. Accordingly, the methodology is divided into four hierarchical sequential stages: i) existing sequence sustainability analysis, ii) optimal sequence determination, iii) optimal sequence sustainability analysis, and iv) sustainability comparison and design modification. The capability of this methodology is tested in designing an optimal sustainable energy efficient distillation columns sequence of aromatics separation unit using a simple and reliable short-cut method within Aspen HYSYS® simulation environment. The energy and sustainability analysis is performed and shows that the optimal sequence determined by the driving force method has better energy reduction with total of 6.78 % energy savings and 0.16 % sustainability reduction compared to existing sequence with. In addition, the economic analysis shows that the return of investment of 3.10 with payback period of 4 months. It can be concluded that, the sequence determined by the driving force method is not only capable in reducing energy consumption, but also has better sustainability index for aromatic separation unit.

scholarly journals Natural gas liquid (NGL) distillation process using driving force and thermal pinch analysis methods: Energy and economic assessment

2020 ◽  
Vol 3 (2) ◽  
pp. 18
Author(s):  
Munawar Zaman Shahruddin ◽  
Mohamad Hamidi Asri ◽  
Rohani Mohd Zin ◽  
Ahmad Nafais Rahimi ◽  
Muhammad Afiq Zubir ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Natural Gas ◽  
Driving Force ◽  
Separation Process ◽  
Pinch Analysis ◽  
Direct Sequence ◽  
Distillation Process ◽  
Optimal Sequence ◽  
Distillation Columns ◽  
Analysis Methods

Distillation column is one of the effective unit operations that is commonly used to separate chemical mixtures. The only drawback of this separation process is its huge energy consumption especially for a multicomponent separation process which involves a series of distillation columns. Therefore, an optimal sequence must be determined to address the issue. This research proposes the methodology to determine the optimal sequence of distillation columns by using driving force method. Then, thermal pinch analysis is applied to obtain further energy saving in the process. The case study selected is a distillation process to recover 5-component of natural gas liquid (NGL) mixture. Based on the input data, the driving force sequence is determined first and simulated together with a conventional sequence (direct sequence). Then, the extracted data from the simulation will be used for thermal pinch analysis via problem table algorithm (PTA). From the results of PTA, energy consumption between both sequences were compared including the energy consumption before and after the thermal pinch analysis. In addition, economic analysis has been performed as well to indicate which sequence has lower capital and operating costs based on the proposed heat exchanger network (HEN). According to the results, the combination of the driving force and thermal pinch analysis methods has successfully recorded 48% of energy savings and operating cost, and 58.2% capital cost saving compared to the conventional sequence (direct sequence). Therefore, it can be said that the proposed framework has a great potential to be employed towards the process and economic feasible distillation process.

A Gibbs energy-driving force method for the optimal design of non-reactive and reactive distillation columns

2019 ◽  
Vol 128 ◽  
pp. 53-68 ◽  
Author(s):  
Teresa Lopez-Arenas ◽  
Seyed Soheil Mansouri ◽  
Mauricio Sales-Cruz ◽  
Rafiqul Gani ◽  
Eduardo S. Pérez-Cisneros
Keyword(s):  
Optimal Design ◽  
Gibbs Energy ◽  
Driving Force ◽  
Reactive Distillation ◽  
Distillation Columns ◽  
Force Method

Energy Efficient Distillation Columns Design for Retrofit NGLs Fractionation Process

2015 ◽  
Vol 1113 ◽  
pp. 667-673
Author(s):  
Mohd Faris Mustafa ◽  
Noor Asma Fazli Abdul Samad ◽  
Kamarul Asri Ibrahim ◽  
Norazana Ibrahim ◽  
Mohd Kamaruddin Abd Hamid
Keyword(s):  
Energy Saving ◽  
Energy Efficient ◽  
Driving Force ◽  
Direct Method ◽  
Energy Requirement ◽  
Systems Design ◽  
Large Energy ◽  
Energy Integration ◽  
Distillation Columns ◽  
Shortcut Method

Distillation is the primary separation process widely used in the industrial chemical process. Although it has many advantages, the main drawback is its large energy requirement, which may significantly influence the overall plant profitability. However, the large energy requirement of these processes can be systematically reduced by using driving force and energy integration methods. This paper presents a methodology for designing energy efficient distillation columns systems based on those two methods. Generally, the proposed methodology consists of four hierarchical steps. In the first step, the system of distillation columns for multicomponent separation is designed based on the conventional distillation column design (shortcut) method. Then, the conventional distillation columns systems design is improved in terms of energy saving by using driving force method in the second step. It is expected in the third step that the distillation columns systems design can be further improved in terms of energy saving by using energy integration method. Finally, the distillation columns systems design is evaluated in terms of economic performance. The simulation results by using Aspen HYSYS have shown that the driving force sequence by using shortcut method for NGLs has energy savings with 55% reduction compared to a direct method with shortcut method. It can be verified that the proposed methodology has the capability in designing energy efficient distillation columns in an easy, systematic and practical manners.

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