A critical review of the effects of pretreatment methods on the exergetic aspects of lignocellulosic biofuels

Soltanian, Salman; Aghbashlo, Mortaza; Almasi, Fatemeh; Hosseinzadeh-Bandbafha, Homa; Nizami, Abdul-Sattar; Ok, Yong Sik; Lam, Su Shiung; Tabatabaei, Meisam

doi:10.1016/j.enconman.2020.112792

Cited by 257 publications

(77 citation statements)

References 179 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Reference environment conditions are denoted by subscript 0. Exergy rate ( _ E) is the sum of physical ( _ E ph ) and chemical ( _ E ch ) exergy rates as follows [34][35][36] :…”

Section: Exergy Analysismentioning

confidence: 99%

“…Exergy balance for an open system is 34‐36 :

{\dot{normalE}}_{D} = \sum_{j} ([], 1 - \frac{{normalT}_{0}}{{normalT}_{normalj}}) {\dot{normalQ}}_{j} - {\dot{normalW}}_{cw} + \sum_{i} {\dot{normalE}}_{i} - \sum_{e} {\dot{normalE}}_{e}

where

{\dot{normalE}}_{D}

is exergy destruction rate,

{\dot{normalQ}}_{j}

is heat transfer rate,

{\dot{normalE}}_{i}

and

{\dot{normalE}}_{e}

are flow rates exergy of the input and output streams. Reference environment conditions are denoted by subscript 0.…”

Section: Exergy Analysismentioning

confidence: 99%

“…Reference environment conditions are denoted by subscript 0. Exergy rate (

\overset{E}{true}

) is the sum of physical (

{\dot{normalE}}_{ph}

) and chemical (

{\dot{normalE}}_{ch}

) exergy rates as follows 34‐36 :

{\dot{normalE}}_{ph} = \sum_{i} {\dot{normaln}}_{i} ∙ ([], ((), {\overset{false¯}{normalh}}_{i} - {\overset{false¯}{normalh}}_{o}) - T_{0} ∙ ((), {\overset{false¯}{normals}}_{i} - {\overset{false¯}{normals}}_{o}))

{\dot{normalE}}_{ch} = \overset{n}{true} ∙ ([], \sum y_{i} ∙ {\overset{false¯}{ex}}_{i}^{ch, normalo} + \overset{R}{true} ∙ T_{0} ∙ \sum y_{i} ∙ \ln ((), {normaly}_{normali}))

where

{\overset{false¯}{ex}}_{i}^{ch, 0}

represents the standard chemical exergy of pure substances form the mixture.…”

Section: Exergy Analysismentioning

confidence: 99%

“…Exergy and exergoeconomic balances, auxiliary equation, and purchased cost for the components4,26,[34][35][36][37] …”

mentioning

confidence: 99%

See 3 more Smart Citations

Exergoeconomic and environmental investigation of an innovative poly‐generation plant driven by a solid oxide fuel cell for production of electricity, cooling, desalinated water, and hydrogen

et al. 2020

View full text Add to dashboard Cite

Fuel cell and renewable-based poly-generation plants (PGPs) are proven as advanced technologies for multiple generation purposes. To limit the greenhouse gas emissions, an innovative PGP generating electricity, cooling, desalinated water, and hydrogen is proposed in the current study. The system consists of a solid oxide fuel cell as a prime mover integrated with a gas turbine, a biomass combustion chamber, an organic Rankine cycle, an ejector refrigeration cycle, a desalination unit, and a proton exchange membrane electrolyzer integrated with solar collectors. As the most effective tools for performance evaluation, exergoeconomic, and environmental analyses have been applied. The system produces electricity of 4.4 MW, refrigeration capacity of 0.16 MW, and desalinated water of 0.96 kg/s. The attained freshwater enters the electrolyzer during 12 daylight hours, leading to hydrogen and sanitary water generation with the values of 1.55 g/s and 0.94 kg/s, respectively. The cost per unit exergy and the total cost rate of the products are 11.28 $/GJ, 223 $/h, correspondingly. Carbon dioxide emission of the system is estimated to be 10.79 kmol/MWh. According to the evaluation, the total cost rate increases with increasing current density and fuel cell inlet temperature and decreasing fuel utilization factor.

show abstract

“…Reference environment conditions are denoted by subscript 0. Exergy rate ( _ E) is the sum of physical ( _ E ph ) and chemical ( _ E ch ) exergy rates as follows [34][35][36] :…”

Section: Exergy Analysismentioning

confidence: 99%

“…Exergy balance for an open system is 34‐36 :

{\dot{normalE}}_{D} = \sum_{j} ([], 1 - \frac{{normalT}_{0}}{{normalT}_{normalj}}) {\dot{normalQ}}_{j} - {\dot{normalW}}_{cw} + \sum_{i} {\dot{normalE}}_{i} - \sum_{e} {\dot{normalE}}_{e}

where

{\dot{normalE}}_{D}

is exergy destruction rate,

{\dot{normalQ}}_{j}

is heat transfer rate,

{\dot{normalE}}_{i}

and

{\dot{normalE}}_{e}

are flow rates exergy of the input and output streams. Reference environment conditions are denoted by subscript 0.…”

Section: Exergy Analysismentioning

confidence: 99%

“…Reference environment conditions are denoted by subscript 0. Exergy rate (

\overset{E}{true}

) is the sum of physical (

{\dot{normalE}}_{ph}

) and chemical (

{\dot{normalE}}_{ch}

) exergy rates as follows 34‐36 :

{\dot{normalE}}_{ph} = \sum_{i} {\dot{normaln}}_{i} ∙ ([], ((), {\overset{false¯}{normalh}}_{i} - {\overset{false¯}{normalh}}_{o}) - T_{0} ∙ ((), {\overset{false¯}{normals}}_{i} - {\overset{false¯}{normals}}_{o}))

{\dot{normalE}}_{ch} = \overset{n}{true} ∙ ([], \sum y_{i} ∙ {\overset{false¯}{ex}}_{i}^{ch, normalo} + \overset{R}{true} ∙ T_{0} ∙ \sum y_{i} ∙ \ln ((), {normaly}_{normali}))

where

{\overset{false¯}{ex}}_{i}^{ch, 0}

represents the standard chemical exergy of pure substances form the mixture.…”

Section: Exergy Analysismentioning

confidence: 99%

“…Exergy and exergoeconomic balances, auxiliary equation, and purchased cost for the components4,26,[34][35][36][37] …”

mentioning

confidence: 99%

See 2 more Smart Citations

Exergoeconomic and environmental investigation of an innovative poly‐generation plant driven by a solid oxide fuel cell for production of electricity, cooling, desalinated water, and hydrogen

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Global modernization, urbanization, and industrialization are accompanied by a substantial expansion of the transportation network and consequently, massive increases in energy demands, mainly met by fossil fuels . These, in turn, have led to increasing emissions of greenhouse gases (mainly carbon dioxide) and the resultant unfavorable phenomena, i.e., global temperature rise and climate change (Soltanian et al, 2020). In this regard, an urgent transition from powering vehicles by fossil-based fuels to more environmentally-friendly alternatives such as electricity generated by wind, solar, and hydro technology is of crucial importance.…”

Section: Introductionmentioning

confidence: 99%

A review on the role of hierarchical zeolites in the production of transportation fuels through catalytic fast pyrolysis of biomass

2020

Self Cite

View full text Add to dashboard Cite

Design of highly active catalysts plays a critical role in catalytic fast pyrolysis (CFP) of lignocellulosic biomass. Advanced catalysts can improve the deoxygenation rate of pyrolysis vapors and boost the production of fuel precursors. Zeolites are suitable frameworks for catalyzing pyrolysis vapors into species of transportation fuel value. However, their nano-sized structure limits the diffusion of reactants into pores and over active sites. Consequently, the aggregation of large molecules outside micropores leads to a massive coke formation, blocking pore channels, and thus, preventing the accessibility to acid sites. This could cause quick deactivation and instability of the catalyst, necessitating frequent catalyst regeneration and replenishment. Hierarchical micro/mesopore-structured zeolites are promising candidates to cope with the mentioned challenges. In addition to their adjusted pore structure and increased accessibility of acid sites, the formation of mesoporosity in zeolites provides an adequate room for the deposition of additional active phases such as metal nanoparticles, further boosting the catalytic activity. Different strategies used for preparing hierarchical zeolites can tremendously alter their attributes, and consequently affect product selectivity during CFP of biomass. Focusing on the precursors of transportation fuels (i.e., aromatic hydrocarbons and olefins), the present paper critically reviews the impacts of methods used for synthesizing hierarchical zeolite, on CFP of bio-based feedstocks. Moreover, the role of metal addition to hierarchical zeolites in biomass catalytic pyrolysis is also discussed briefly. Among the different synthesis techniques, desilication treatment using alkaline solutions is the most promising owing to its simplicity, high productivity, and scalability. In terms of product selectivity, the addition of Ga species to hierarchical zeolites can increase aromatic hydrocarbons while Ce incorporation can increase the yield of valuable oxygenates such as furan. Despite the advantages of mono-metallic hierarchical zeolites in producing cherished chemicals, future studies should scrutinize the influence of bi-metallic hierarchical zeolites in bio-based CFP processes.

show abstract

Lignocellulose Bioconversion

Gamboa‐Santos

Alzamendi

2022

Lignocellulose Bioconversion Through White Biotechnology

View full text Add to dashboard Cite

A critical review of the effects of pretreatment methods on the exergetic aspects of lignocellulosic biofuels

Cited by 257 publications

References 179 publications

Exergoeconomic and environmental investigation of an innovative poly‐generation plant driven by a solid oxide fuel cell for production of electricity, cooling, desalinated water, and hydrogen

Exergoeconomic and environmental investigation of an innovative poly‐generation plant driven by a solid oxide fuel cell for production of electricity, cooling, desalinated water, and hydrogen

A review on the role of hierarchical zeolites in the production of transportation fuels through catalytic fast pyrolysis of biomass

Lignocellulose Bioconversion

Contact Info

Product

Resources

About