Biodiesel from microalgae oil production in two sequential esterification/transesterification reactors: Pinch analysis of heat integration

2011 ◽  
Vol 176-177 ◽  
pp. 211-216 ◽  
Author(s):  
E. Sánchez ◽  
K. Ojeda ◽  
M. El-Halwagi ◽  
V. Kafarov
Keyword(s):  
Oil Production ◽  
Heat Integration ◽  
Pinch Analysis ◽  
Microalgae Oil

scholarly journals Reduction in Energy Requirement and CO2 Emission for Microalgae Oil Production Using Wastewater

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1641 ◽  
Author(s):  
Riaru Ishizaki ◽  
Ryozo Noguchi ◽  
Agusta Samodra Putra ◽  
Sosaku Ichikawa ◽  
Tofael Ahamed ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Crude Oil ◽  
Co2 Emission ◽  
Energy Requirement ◽  
Treatment Plant ◽  
Material Balance ◽  
Oil Production ◽  
Co2 Absorption ◽  
Direct Energy ◽  
Microalgae Oil

A comparative evaluation of energy requirement and CO2 emission was performed for native polyculture microalgae oil production in a wastewater treatment plant (WWTP). The wastewater provided nutrients for algae growth. Datasets of microalgae oil production and their details were collected from the Minamisoma pilot plant. Environmental impact estimation from direct energy and material balance was analyzed using SimaPro® v8.0.4. in two scenarios: existing and algal scenarios. In the existing scenario, CO2 emission sources were from wastewater treatment, sludge treatment, and import of crude oil. In the algal scenario, CO2 emission with microalgae production was considered using wastewater treatment, CO2 absorption from growing algae, and hydrothermal liquefaction (HTL) for extraction, along with the exclusion of exhausted CO2 emission for growing algae and use of discharged heat for HTL. In these two scenarios, 1 m3 of wastewater was treated, and 2.17 MJ higher heating value (HHV) output was obtained. Consequently, 2.76 kg-CO2 eq/m3-wastewater in the existing scenario and 1.59 kg-CO2 eq/m3-wastewater in the algal scenario were calculated. In the HTL process, 21.5 MJ/m3-wastewater of the discharged heat energy was required in the algal scenario. Hence, the efficiency of the biocrude production system will surpass those of the WWTP and imported crude oil.

Cultivation ofDesmodesmus subspicatusin a tubular photobioreactor for bioremediation and microalgae oil production

2013 ◽  
Vol 35 (2) ◽  
pp. 209-219 ◽  
Author(s):  
Pablo Gressler ◽  
Thiago Bjerk ◽  
Rosana Schneider ◽  
Maiara Souza ◽  
Eduardo Lobo ◽  
...  
Keyword(s):  
Oil Production ◽  
Tubular Photobioreactor ◽  
Microalgae Oil

scholarly journals Engineering Study of a Pilot Scale Process Plant for Microalgae-Oil Production Utilizing Municipal Wastewater and Flue Gases: Fukushima Pilot Plant

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1693 ◽  
Author(s):  
Nugroho Sasongko ◽  
Ryozo Noguchi ◽  
Junko Ito ◽  
Mikihide Demura ◽  
Sosaku Ichikawa ◽  
...  
Keyword(s):  
Pilot Plant ◽  
Municipal Wastewater ◽  
Oil Production ◽  
Pilot Scale ◽  
Flue Gases ◽  
Process Plant ◽  
Engineering Study ◽  
Microalgae Oil

scholarly journals Heat Integration of an Industrial Unit for the Ethylbenzene Production

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3839
Author(s):  
Leonid M. Ulyev ◽  
Maksim V. Kanischev ◽  
Roman E. Chibisov ◽  
Mikhail A. Vasilyev
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Carbon Dioxide Emissions ◽  
Process Integration ◽  
Heat Integration ◽  
Pinch Analysis ◽  
Steam Consumption ◽  
Joint Project ◽  
Alkylation Of Benzene ◽  
Industrial Unit

This paper presents both the results of a study of the existing heat exchanger network (HEN) of an industrial unit for ethylbenzene (EB) production by the alkylation of benzene with ethylene, and an analysis of four different HEN retrofit projects carried out using process integration methods. The project of modernization of HEN was carried out using classical methods of Pinch analysis. For this case, the value of ΔTmin is determined, which is limited by the technological conditions of the process. Additionally, two different heat pump (HP) integration options and the joint retrofit Pinch project with HP integration are under consideration. The economic analysis of each of the projects was carried out. It is shown that the best results will be obtained when implementing the joint project. As a result, steam consumption will be reduced by 34% and carbon dioxide emissions will be decreased by the same amount.

scholarly journals Energy Management through Heat Integration: a Simple Algorithmic Approach for Introducing Pinch Analysis

2015 ◽  
Vol 20 (2) ◽  
pp. 1
Author(s):  
Nasser A. Al-Azri
Keyword(s):  
Process Integration ◽  
Algebraic Approach ◽  
Algebraic Method ◽  
Heat Integration ◽  
Pinch Analysis ◽  
Matlab Toolbox ◽  
Pinch Point ◽  
Algorithmic Approach ◽  
External Resources ◽  
Algorithmic Procedure

Pinch analysis is a methodology used for minimizing energy and material consumption in engineering processes. It features the identification of the pinch point and minimum external resources. Two common established approaches are used to identify these features: the graphical approach and the algebraic method, which are time-consuming and susceptible to human and calculation errors when used for a large number of process streams. This paper presents an algorithmic procedure to heat integration based on the algebraic approach. The algorithmic procedure is explained in a didactical manner to introduce pinch analysis for students and novice researchers in the field. Matlab code is presented, which is also intended for developing a Matlab toolbox for process integration.  

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