Reduction of process steam demand and water-usage through heat integration in sugar and ethanol production from sugarcane – Evaluation of different plant configurations

Pina, Eduardo A.; Palacios‐Bereche, Reynaldo; Chavez-Rodriguez, Mauro F.; Ensinas, Adriano V.; Modesto, Marcelo; Nebra, Sílvia A.

doi:10.1016/j.energy.2015.06.054

Cited by 56 publications

(36 citation statements)

References 25 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The pinch method was here adopted to determinate the minimal energy consumption targets after doing process design and simulation. The ∆T min considered in this study for the process streams was 10 • C, except for flow streams coming from evaporation systems, where 4 • C was selected [24,30]. Once these values are common practice in the sugar and ethanol plants, focus is on thermal integration implementation.…”

Section: Heat Integration Through Pinch Analysismentioning

confidence: 99%

Mass and Heat Integration in Ethanol Production Mills for Enhanced Process Efficiency and Exergy-Based Renewability Performance

2019

View full text Add to dashboard Cite

This paper presents the process design and assessment of a sugarcane-based ethanol production system that combines the usage of both mass and heat integration (pinch analysis) strategies to enhance the process efficiency and renewability performance. Three configurations were analyzed: (i) Base case: traditional ethanol production (1G); (ii) mass-integrated (1G2G); and (iii) mass and heat-integrated system (1G2G-HI). The overall assessment of these systems was based on complementary approaches such as mass and mass–heat integration, energy and exergy analysis, exergy-based greenhouse gas (GHG) emissions, and renewability exergy criteria. The performances of the three cases were assessed through five key performance indicators (KIPs) divided into two groups: one is related to process performance, namely, energy efficiency, exergy efficiency, and average unitary exergy cost (AUEC), and the other one is associated to environmental performance i.e., exergy-based CO2-equation emissions and renewability exergy index. Results showed a higher exergy efficiency of 50% and the lowest AUEC of all the systems (1.61 kJ/kJ) for 1G2G-HI. Furthermore, the destroyed exergy in 1G2G-HI was lower by 7% and 9% in comparison to the 1G and 1G2G cases, respectively. Regarding the exergy-based GHG emissions and renewability performance (λindex), the 1G2G-HI case presented the lowest impacts in terms of the CO2-equivalent emissions (94.10 gCO2-eq/MJ products), while λindex was found to be environmentally unfavorable (λ = 0.77). However, λindex became favorable (λ > 1) when the useful exergy of the byproducts was considered.

show abstract

Section: Heat Integration Through Pinch Analysismentioning

confidence: 99%

Mass and Heat Integration in Ethanol Production Mills for Enhanced Process Efficiency and Exergy-Based Renewability Performance

2019

View full text Add to dashboard Cite

show abstract

“…The reduction in water consumption was 24% and 13% compared to conventional cases without heat integration. [82]…”

Section: A Biorefinery Producingmentioning

confidence: 99%

A Review of Advances in Bioethanol Production Processes from Oil Palm Empty Fruit Bunch

Solano¹,

Rodríguez²,

Ballesteros³

et al. 2018

IJCTR

View full text Add to dashboard Cite

Many studies are carried out in different countries to find alternatives of hydrocarbon-based fuels,1 which include hydro, wind, biofuels, solar, and geothermal energy. One of the major biofuels isbioethanol, a clear, colorless liquid, biodegradable, and lowin toxicity, and can be considered as a high-octane fuel oroctane enhancer in domestic petrols. The pre-treatment process for oil palm empty fruit bunches (OPEFB) or empty fruit bunches (EFB)for produce bioethanol require convert the complex lignocellulose structures into enzymatically digestible forms and easy handling for use. The pre-treatment can to be divided into physical, chemical, biological and physico-chemical tre-treatment. Various studies on the subject are presented below either a single treatment or combination of several. Nevertheless, the most important problem with bioethanol downstream processing is the dewatering step due to azeotropic formation during distillation of ethanol-water mixtures. Currently, different methods like direct contact membrane distillation (MDBR), extractive batch distillation, pervaporation, adsorption, molecular sieve and pressure Swing Adsorption (PSA) are used for bioethanol dehydration with regard to the absolute ethanol production. Also, mass and energy integration processes are also reviewed.

show abstract

“…Also, the market potential with bioelectricity provides mills with financial gains and increase cash flow to face the crisis related to the ethanol price and drop in the sugar value in the international market (Pina et al, 2015;Arshad & Ahmed, 2016;Cervi et al, 2019;Lemos et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Increased Energy Cogeneration in the Sugar-Energy Sector With the Use of Sugarcane Straw, Electrification of Drives, and High-Drainage Rollers in the Extraction

Santos

Ramos

2020

Eng. Agríc.

View full text Add to dashboard Cite

The sugar-energy sector stands out in the production of electrical energy in the Brazilian energy matrix. The updating of Law 9,427 allowed increasing the limit of power injected in the transmission or distribution systems of existing projects from 30 to 50 MW, encouraging studies of expansion and/or implementation of new cogeneration projects. This study analyzed technologies to enhance energy cogeneration in a plant that sells about 27 MW of surplus power. For this, were studied the use of straw, electrification of drives by steam turbines, and high-drainage rollers (lotus mill roller), which allows reducing bagasse moisture, increasing its lower calorific value (LCV) and, consequently, electrical energy generation. Mass and energy balances in the energy plants of the proposed cases were performed using the software IPSEpro ®. Economic analyses were carried out using the conventional techniques of economic engineering (payback period, net present value-NPV, internal rate of return-IRR, and return on invested capital-ROIC). These analyses allowed the technical and economical identification of cases with viability, according to the value of the electrical energy sold.

show abstract

Reduction of process steam demand and water-usage through heat integration in sugar and ethanol production from sugarcane – Evaluation of different plant configurations

Cited by 56 publications

References 25 publications

Mass and Heat Integration in Ethanol Production Mills for Enhanced Process Efficiency and Exergy-Based Renewability Performance

Mass and Heat Integration in Ethanol Production Mills for Enhanced Process Efficiency and Exergy-Based Renewability Performance

A Review of Advances in Bioethanol Production Processes from Oil Palm Empty Fruit Bunch

Increased Energy Cogeneration in the Sugar-Energy Sector With the Use of Sugarcane Straw, Electrification of Drives, and High-Drainage Rollers in the Extraction

Contact Info

Product

Resources

About