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    Carbon Capture & Storage Deployment in Iran

    , Article Energy Procedia ; Volume 37 , 2013 , Pages 7492-7501 ; 18766102 (ISSN) Banan, Z ; Maleki, A ; Sharif University of Technology
    Based on International Energy Agency studies, achievement of 450 ppm CO2-equivalent emission target in global emission means that the CO2 emissions in 2050 must be reduced to %50 of 2005 level, and this implies that a portfolio of emission reduction policies and strategies need to be exploited through current century. At the present time, Carbon Capture and Storage (CCS) Technology is a dominant strategy among all the long-term carbon abatement strategies in many countries. Nevertheless, its potential as a climate mitigating option will be proved, only if it is implemented in the countries which are developing at a great pace and taking advantage of fossil fuels in order to afford their... 

    Promotion of low-carbon economy through efficiency analysis: A case study of a petrochemical plant

    , Article International Journal of Environmental Research ; 2020 Keivani, E ; Abbaspour, M ; Abedi, Z ; Ahmadian, M ; Sharif University of Technology
    Springer Science and Business Media Deutschland GmbH  2020
    Over the past few decades, industrial development has caused a dramatic increment in greenhouse gas (GHG) emissions, as a leading cause of climate change. Modifying the industrial plants' environmental performance is the main pillar of improving efficiency that can reduce the waste of resources and make achieving lower-cost global emission reduction targets of the Kyoto protocol's clean development mechanism (CDM) possible. Considering the essentiality of knowledge-based research in increasing the awareness of policymakers by providing better access to accurate and reliable information, an analytical survey on efficiency in oil, gas, and petrochemical industries has been conducted by... 

    New insight on dynamic behavior of swelling and bond number of light and heavy crude oil during carbonated water flooding

    , Article European Physical Journal Plus ; Volume 135, Issue 1 , January , 2020 Lashkarbolooki, M ; Zeinolabedini Hezave, A ; Riazi, M ; Ayatollahi, S ; Sharif University of Technology
    Springer  2020
    Improving oil recovery and decreasing greenhouse gas emissions are two important attractive features of CO2-enriched water injection into oil reservoirs. Regarding these unique features, the main objective of this study was concentrated to evaluate the swelling behavior of crude oil as a fundamental mechanism of carbonated water (CW) flooding. To achieve these goals, the swelling and Bond number of light and heavy crude oils (namely LCO and HCO, respectively) are measured and compared to each other. The results obtained from the measured swelling factors of crude oil/CW show some complicated behaviors. That is, as temperature increases the swelling factor decreases at low pressure... 

    Projection of passenger cars’ fuel demand and greenhouse gas emissions in Iran by 2050

    , Article Energy Conversion and Management: X ; Volume 12 , 2021 ; 25901745 (ISSN) Hassani, A ; Maleki, A ; Sharif University of Technology
    Elsevier Ltd  2021
    Passenger cars (PCs) not only are a major contributor to greenhouse gas (GHG) emissions in Iran but also pose severe energy security challenges due to their dependence on gasoline. This study aimed to understand the future trends of the gasoline demand and GHG emissions from PCs in Iran and assess the effectiveness of mitigation policies. The data were collected from multiple sources and used to develop the survival rate function of PCs. The study used back-calculation to compensate for the short period of stock data availability. The use intensity of PCs was estimated based on the gasoline consumption statistics. Econometric models were developed to project the future PC stock and use... 

    A new design for inlet diffuser of automotive catalytic converter

    , Article 2006 Spring Technical Conference of the ASME Internal Combustion Engine Division, Aachen, 7 May 2006 through 10 May 2006 ; 2006 , Pages 109-115 ; 15296598 (ISSN) ; 0791842061 (ISBN); 9780791842065 (ISBN) Saidi, M. H ; Mozafari, A. A ; Ghasemi, A ; Sharif University of Technology
    The monolithic catalytic converter still is the main pollution control device for modern vehicles in order to reach the ever-increasing legislative demands for low emission standards. The catalytic converters require a large expansion from the exhaust pipe to the front face of the monolith. Unfortunately, packaging constraints often do not permit the use of long diffusers. Hence, flow separation within the diffuser leads to a non-uniform flow distribution across the monolith. A uniform flow distribution at the inlet monolith face is favorable for the conversion efficiency as well as the durability of the catalytic converter. Therefore the main problem is to optimize the flow distribution at... 

    A stochastic aggregate production planning model in a green supply chain: Considering flexible lead times, nonlinear purchase and shortage cost functions

    , Article European Journal of Operational Research ; Volume 230, Issue 1 , 2013 , Pages 26-41 ; 03772217 (ISSN) Mirzapour Al-E-Hashem, S. M. J ; Baboli, A ; Sazvar, Z ; Sharif University of Technology
    In this paper we develop a stochastic programming approach to solve a multi-period multi-product multi-site aggregate production planning problem in a green supply chain for a medium-term planning horizon under the assumption of demand uncertainty. The proposed model has the following features: (i) the majority of supply chain cost parameters are considered; (ii) quantity discounts to encourage the producer to order more from the suppliers in one period, instead of splitting the order into periodical small quantities, are considered; (iii) the interrelationship between lead time and transportation cost is considered, as well as that between lead time and greenhouse gas emission level; (iv)... 

    Optimization of ferrous biooxidation rate in a packed bed bioreactor using Taguchi approach

    , Article Chemical Engineering and Processing: Process Intensification ; Volume 46, Issue 10 , 2007 , Pages 935-940 ; 02552701 (ISSN) Mousavi, S. M ; Yaghmaei, S ; Jafari, A ; Vossoughi, M ; Ghobadi, Z ; Sharif University of Technology
    The biological oxidation of ferrous ion by iron-oxidizing bacteria is potentially a useful industrial process for removal of H2S from industrial gases, desulphurization of coal, removal of sulfur dioxide from flue gas, treatment of acid mine drainage and regeneration of an oxidant agent in hydrometallurgical leaching operations. The main purpose of this study was to find optimum values of the process parameters on the ferrous biooxidation rate by immobilization of a native Sulfobacillus species on the surface of low density polyethylene (LDPE) particles in a packed-bed bioreactor using Taguchi method. Five control factors, including temperature, initial pH of feed solution, dilution rate,... 

    Pollutant emissions study of gas fueled SI engines

    , Article Powertrain and Fluid Systems Conference and Exhibition, San Antonio, TX, 24 October 2005 through 27 October 2005 ; 2005 ; 01487191 (ISSN) Dordaei, H ; Hazhir, A ; Eisazadeh Far , K ; Sharif University of Technology
    SAE International  2005
    An experimental study of pollutant emissions of a SI gas engine with CNG fuel has been done. In this work the role of various parameters such as air-fuel ratio, the shape of combustion chamber and spark timing on pollutant emissions of the engine have been investigated. The effect of three different combustion chambers with various compression ratios was studied and it was found that combustion chamber shape has a vital effect on exhaust emissions. Copyright © 2005 SAE International  

    Development of a mathematical methodology to investigate biohydrogen production from regional and national agricultural crop residues: A case study of Iran

    , Article International Journal of Hydrogen Energy ; Volume 42, Issue 4 , 2017 , Pages 1989-2007 ; 03603199 (ISSN) Asadi, N ; Karimi Alavijeh, M ; Zilouei, H ; Sharif University of Technology
    Elsevier Ltd  2017
    This study aims to construct a quantitative framework to assess biological production of hydrogen from agricultural residues in a country or region. The presented model is able to determine proper crops for biohydrogen production, its possible applications and use as well as environmental aspects. A multiplicative decomposition method was designed to forecast future production and Monte Carlo simulation was employed in the model to evaluate the risk of estimations. From 2013 to 2050, the hydrogen production capacity could increase from 53.59 to 164.41 kilotonnes (kt) in Iran. The highest contribution to biohydrogen production (52.1% in 2013 and 73.3% in 2050) belongs to cereal crops... 

    A scenario-based optimization of smart energy hub operation in a stochastic environment using conditional-value-at-risk

    , Article Sustainable Cities and Society ; Volume 39 , 2018 , Pages 309-316 ; 22106707 (ISSN) Roustai, M ; Rayati, M ; Sheikhi, A ; Ranjbar, A. M ; Sharif University of Technology
    Elsevier Ltd  2018
    Besides increasing the installation of distributed generation plants, investigation on multi-carrier energy systems leads recent studies to focus on several aspects of Smart Energy Hub (S. E. Hub) systems. An S. E. Hub incorporates several modules which calculation of optimal size and operation of each have already attracted a great deal of research. Uncertainty in the modeling of these modules is an imperative factor that was not paid attention in S. E. Hub models properly. To build up a more precise framework for S. E. Hubs, here we present a stochastic model for real time electricity and natural-gas prices and electricity demands. In this paper, an S. E. Hub operates in order to minimize... 

    Examination of Activity of Oxidation Catalysts Toward Co and Hydrocarbon Emission Reduction from 4-Stroke Gasoline Carburetor Scooters in Tehran

    , M.Sc. Thesis Sharif University of Technology Lotfollahzadeh Moghaddam, Alireza (Author) ; Hamzehlouyan, Tayebeh (Supervisor) ; Hosseini, Vahid (Co-Supervisor)
    Over one million motorcycles operating in Tehran produce significant amounts of CO and unburnt hydrocarbons, thereby considered as one of the major contributors to air pollution in the city of Tehran. Oxidation catalysts, as emission control device, can reduce CO and hydrocarbon emissions from motorcycles. The efficiency of these catalysts under typical operating conditions of vehicles exhaust gas has been studied in the literature. However, due to the specific features of motorcycles exhaust gas in Tehran, such as low air to fuel ratio, different exhaust gas composition and significant amount of lubricating oil consumption, selection of a highly active, durable and cost-effective catalyst... 

    Using sensitivity analysis and gradual evaluation of ignition delay error to produce accurate low-cost skeletal mechanisms for oxidation of hydrocarbon fuels under high-temperature conditions

    , Article Energy and Fuels ; Volume 31, Issue 10 , 2017 , Pages 11234-11252 ; 08870624 (ISSN) Shakeri, A ; Mazaheri, K ; Owliya, M ; Sharif University of Technology
    Three-dimensional thermo-hydrodynamic analysis of gas turbine combustion chambers is of great importance in the power generation industry to achieve higher efficiency and reduced emissions. However, it is prohibitive to use a comprehensive full-detailed mechanism in their simulation algorithms because of the huge CPU time and memory space requirements. Many reduction approaches are available in the literature to remedy this problem. Here a new approach is presented to reduce large detailed or skeletal mechanisms of oxidation of hydrocarbon fuels to a low-cost skeletal mechanism. The method involves an integrated procedure including a Sensitivity Analysis (SA) and a procedure of Gradual... 

    Optimal electricity supply system under iranian framework limitations to meet its emission pledge under the Paris climate agreement

    , Article International Journal of Sustainable Energy Planning and Management ; Volume 30 , 2021 , Pages 75-96 ; 22462929 (ISSN) Abbasi Godarzi, A ; Maleki, A ; Sharif University of Technology
    Aalborg University press  2021
    As part of its Paris Agreement commitment, Iran pledged to decrease 4 % of its carbon dioxide (CO2) emissions from 2020 to 2030. About 29% of total emission in Iran belongs to electricity supply while energy consumption in other sectors (transport, household, and industry) have a lower share in CO2 emission. The main concern here is finding the optimal mix of power plants in the electricity supply system that should be deployed to meet Iran’s mentioned respective targets and considering simultaneously interests of consumers and producers in this energy system. So, we developed a non-linear mathematical programming model for Iran’s electricity system to address this concern with changing... 

    Comparative assessment of bioethanol supply chain: insights from Iran

    , Article Biofuels ; Volume 12, Issue 4 , 2021 , Pages 475-483 ; 17597269 (ISSN) Haj Hasan, A ; Avami, A ; Sharif University of Technology
    Taylor and Francis Ltd  2021
    Biofuels are important alternative fuel in recent years. In this work, the bioethanol supply chain planning is performed by BioEnergy Supply Model to optimally find the best pathways using economic and environmental objective functions in Iran. Then, different sustainability criteria focusing on environmental, economic, and social concerns are assessed for possible routes of the bioethanol production from available resources. Although agriculture residues and wastes, decrease the greenhouse gas emissions but municipal solid wastes are more economic and require less water. The agricultural wastes and residues improve the sustainability. Then, criteria focusing on environmental, economic, and... 

    Simulation and experimental investigation of performance and emissions of a turbocharged lean-burn natural gas engine considering thermal boundary layer

    , Article Scientia Iranica ; Vol. 21, issue. 4 , 2014 , pp. 1424-1439 ; ISSN: 10263098 Kharazmi, Sh ; Mozafari, A ; Hajilouy-Benisi, A ; Sharif University of Technology
    Emission characteristics of pure natural gas is fairly known, however more experimental investigation of natural gas combustion is necessary. In this research, emission and performance of a turbocharged natural gas SI engine are investigated experimentally at WOT and lean burn conditions. A computer code is also developed in MATLAB environment for predicting engine performance and NO emission and the results are validated with experimental data. Thermal boundary layer, as a novel approach, is considered in the simulation and a better agreement of predicted mass fraction burned was achieved at end part of combustion process when compared with experimental results. Experimental results have... 

    Asphaltene deposition during CO 2 injection and pressure depletion: A visual study

    , Article Energy and Fuels ; Volume 26, Issue 2 , December , 2012 , Pages 1412-1419 ; 08870624 (ISSN) Zanganeh, P ; Ayatollahi, S ; Alamdari, A ; Zolghadr, A ; Dashti, H ; Kord, S ; Sharif University of Technology
    Carbon dioxide miscible flooding has become a popular method for Enhanced Oil Recovery (EOR) because it not only efficiently enhances oil recovery but also considerably reduces green house gas emissions. However, it can significantly cause asphaltene deposition, which leads to serious production problems such as wettability alteration, plugging of the reservoir formation, blocking the transportation pipelines, etc. It is crucial to investigate the effects of different factors on asphaltene deposition. A novel experimental setup was prepared to employ a high-pressure visual cell for investigation of asphaltene deposition on a model rock under typical reservoir conditions. The evolution of... 

    Modeling and optimization of a network of energy hubs to improve economic and emission considerations

    , Article Energy ; Volume 93 , December , 2015 , Pages 2546-2558 ; 03605442 (ISSN) Maroufmashat, A ; Elkamel, A ; Fowler, M ; Sattari, S ; Roshandel, R ; Hajimiragha, A ; Walker, S ; Entchev, E ; Sharif University of Technology
    Elsevier Ltd  2015
    Energy hubs that incorporate a variety of energy generation and energy transformation technologies can be used to provide the energy storage needed to enable the efficient operation of a ‘smart energy network’. When these hubs are combined as a network and allowed to exchange energy, they create efficiency advantages in both financial and environmental performance. Further, the interconnectedness of the energy network design provides an added layer of reliability. In this paper, a complex network of energy hubs is modeled and optimized under different scenarios to examine both the financial viability and potential reduction of greenhouse gas emissions. Two case studies consisting of two and... 

    Visual investigation and modeling of asphaltene precipitation and deposition during CO2 miscible injection into oil reservoirs

    , Article Fuel ; Volume 160 , 2015 , Pages 132-139 ; 00162361 (ISSN) Zanganeh, P ; Dashti, H ; Ayatollahi, S ; Sharif University of Technology
    Elsevier Ltd  2015
    Abstract Miscible carbon dioxide (CO2) flooding has become the most commonly and favorable approach in Enhanced Oil Recovery (EOR) because of its high oil reservoir sweep efficiency and contribution to the reduction of greenhouse gas emissions. Despite this, it can significantly favor the asphaltene deposition, which leads to the wettability reversal and formation damage. A novel experimental setup was utilized to study asphaltene deposition on the model rock at reservoir condition. The evolution of asphaltene deposition was monitored by a microscope; then analyzed by image processing software to check the amount of deposited asphaltene and its size distribution at different... 

    Development of the energy hub networks based on distributed energy technologies

    , Article Simulation Series, 26 July 2015 through 29 July 2015 ; Volume 47, Issue 10 , 2015 , Pages 216-223 ; 07359276 (ISSN) Maroufmashat, A ; Elkamel, A ; Sattari Khavas, S ; Fowler, M ; Roshandel, R ; Elsholkami, M ; Sharif University of Technology
    The Society for Modeling and Simulation International  2015
    In this paper the creation of multiple energy hubs that make up a complex energy network are modeled and optimized for a selection of six scenarios to examine both their financial viability and potential reduction of greenhouse gas emissions. As a proposed case study scenario for the model, three energy hubs are considered: a 'residential complex (RC)', a 'commercial shopping plaza (CS)', and a 'school (S)'. The use of combined heat and power systems, solar photovoltaic, solar collectors and network interaction are also examined for their impact on efficiency and cost. The modeling is undertaken and carried out by General Algebraic Modeling System (GAMS). It is shown that cost can be reduced... 

    A hybrid genetic and imperialist competitive algorithm for green vendor managed inventory of multi-item multi-constraint EOQ model under shortage

    , Article Applied Soft Computing Journal ; Volume 30 , May , 2015 , Pages 353-364 ; 15684946 (ISSN) Roozbeh Nia, A ; Hemmati Far, M ; Akhavan Niaki, S. T ; Sharif University of Technology
    Elsevier Ltd  2015
    The purpose of this paper is to develop a multi-item economic order quantity (EOQ) model with shortage for a single-buyer single-supplier supply chain under green vendor managed inventory (VMI) policy. This model explicitly includes the VMI contractual agreement between the vendor and the buyer such as warehouse capacity and delivery constraints, bounds for each order, and limits on the number of pallets. To create a kind of green supply chain, tax cost of green house gas (GHG) emissions and limitation on total emissions of all items are considered in the model. A hybrid genetic and imperialist competitive algorithm (HGA) is employed to find a near-optimum solution of a nonlinear...