On Reduced Consumption of Fossil Fuels in 2020 and Its Consequences in Global Environment and Exergy Demand

Rashedi, Ahmad; Khanam, Taslima; Jonkman, Mirjam

doi:10.20944/preprints202011.0275.v1

Cited by 13 publications

(2 citation statements)

References 20 publications

(33 reference statements)

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“…Thus, the predictions of the proposed empirical models solidly substantiate its applicability and accuracy for satisfactorily capturing the LCC of GGRAC compressive members by bearing in mind the involvement of GFRP longitudinal and transverse bars. The proposed structural element is a feasible member in terms of cost, material availability, and environmental sustainability factor [ 58 , 59 , 60 ].…”

Section: Theoretical Calculationsmentioning

confidence: 99%

On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops

et al. 2021

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Structural members comprising geopolymer recycled aggregate concrete (RAC) reinforced with glass fiber-reinforced polymer (GFRP) bars have not been investigated appropriately for axial compressive loading cases. The present study addresses this knowledge gap by evaluating the structural efficiency of GFRP-reinforced geopolymer recycled aggregate concrete (GGRAC)-based members subjected to axial compressive loading. A total of nine compressive members (250 mm in cross-section and 1150 mm in height) were constructed to examine the effect of the number of longitudinal GFRP bars and the vertical spacing of transverse GFRP hoops/ties. The experimental results portrayed that the ductility of GGRAC compressive members improved with the reduction in the pitch of GFRP hoops. The axial load-carrying capacity (LCC) of GGRAC compressive members increased by increasing the number of GFRP bars up to eight (corresponding to a reinforcement ratio of 2.11%) while it decreased by using ten longitudinal GFRP bars (corresponding to a reinforcement ratio of 2.65%). Additionally, an empirical model was suggested to predict the axial LCC of GGRAC compressive members based on a large amount of experimental data of similar members. The experimental results and related theoretical predictions substantially prove the applicability and accuracy of the proposed model. The proposed column represents a feasible structural member in terms of material availability and environmental sustainability.

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Section: Theoretical Calculationsmentioning

confidence: 99%

On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops

et al. 2021

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“…3,4 Important information about energy systems and their improvement can be determined via exergy analysis. [5][6][7] "Exergy analysis has been combined with economics to quantify the cost of the exergy destruction and losses, and the cost of artificial activities, thus optimizing various anthropic processes and improving the thermal-economic performances at each stage, thereby facilitating downstream decision-making". 8,9 Several researches have been conducted to analyze the exergy and resource efficiency of different processes and sectors.…”

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Energy and exergy assessment with updated Reistad estimates: A case study in the transportation sector of Bangladesh

Chowdhury

Rashedi

et al. 2021

Energy Science & Engineering

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The Green Synthesis of Biodiesel via Esterification in Water Catalyzed by the Phosphotungstic Acid–Functionalized Hydrophobic MCM–41 Catalyst

Li,

Shi,

Liang

et al. 2024

Catalysts

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Biodiesel is a non-toxic and environmentally friendly fuel that is made from renewable biological sources. It can replace petrochemical diesel and has very broad application prospects. However, the main raw materials in biodiesel are animal and plant oils, which present the problems of high costs and a lack of resources. The current research primarily emphasizes the transesterification process, with comparatively less focus on the esterification of fatty acids. In this paper, a series of phosphotungstic acid (PTA)-functionalized hydrophobic MCM–41 catalysts, OTS–PTA–MCM–41(Cx), were synthesized and used to catalyze the esterification of long-chain fatty acids with methanol in water. The experimental results show that the yield of esterification reached a maximum when catalyzed by OTS–PTA–MCM–41(Cx) and synthesized with a template agent with two carbon atoms less than the number of carbon atoms of a fatty acid. The effects of different reaction variables were investigated to optimize the reaction conditions for the maximum conversion. The stability of the catalyst was also verified. Finally, a mixed catalyst was used to catalyze in situ the esterification of fatty acids in a fermentation broth, which reached a high level (close to 90%). This paper provides references for the synthesis of a hydrophobic solid acid catalyst and green synthesis by esterification reactions in an aqueous solution and a fermentation broth system.

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On Reduced Consumption of Fossil Fuels in 2020 and Its Consequences in Global Environment and Exergy Demand

Cited by 13 publications

References 20 publications

On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops

On the Structural Performance of Recycled Aggregate Concrete Columns with Glass Fiber-Reinforced Composite Bars and Hoops

Energy and exergy assessment with updated Reistad estimates: A case study in the transportation sector of Bangladesh

The Green Synthesis of Biodiesel via Esterification in Water Catalyzed by the Phosphotungstic Acid–Functionalized Hydrophobic MCM–41 Catalyst

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