Application of PDMS pervaporation membranes filled with tree bark biochar for ethanol/water separation

Lan, Yongqiang; Yan, Ning; Wang, Weihong

doi:10.1039/c6ra06794h

Cited by 20 publications

(12 citation statements)

References 19 publications

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“…The slight change in water static surface contact angle is attributed to the increase in surface roughness as a result of the incorporation of the AC nanofillers in the PDMS membranes. This behaviour also has been reported by other researchers …”

Section: Resultssupporting

confidence: 92%

Effect of embedded activated carbon nanoparticles on the performance of polydimethylsiloxane (PDMS) membrane for pervaporation separation of butanol

Azimi

Tezel

Thibault

2017

J. Chem. Technol. Biotechnol

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BACKGROUND: The pervaporation separation method is considered to be a promising technique for biobutanol recovery from fermentation broths. In this work, activated carbon nanoparticles were embedded in polydimethylsiloxane (PDMS) membranes to improve the pervaporation performance. RESULTS: Adding 6 wt% nano-additives in PDMS membranes increased the flux and separation factor by 42.6% and 51.9%, respectively, compared with neat membranes at 37 ∘ C. Enhanced performance is due to: 1 the presence of additional sorption sites within the membrane with a high affinity for butanol; and 2 the porous structure of the nanofillers generate new pathways for facilitated mass transport through the membrane. The effect of the operating temperature and particle concentration on membrane performance was investigated. Membrane performance improved with an increase in the operating temperature. Higher temperature resulted in increased free volume in the PDMS chains leading to higher diffusion of butanol. Mechanical tensile tests showed that nanocomposite membranes have better mechanical stability in comparison with neat PDMS membranes with the best performance observed at 6 wt% of the nano-additives. CONCLUSION:The presence of activated carbon nanoparticles in the matrix of PDMS membranes leading to higher flux and separation factor can be beneficial for pervaporation separation of butanol from fermentation broths.

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Section: Resultssupporting

confidence: 92%

Effect of embedded activated carbon nanoparticles on the performance of polydimethylsiloxane (PDMS) membrane for pervaporation separation of butanol

Azimi

Tezel

Thibault

2017

J. Chem. Technol. Biotechnol

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“…As presented in Table 1, typical environmental applications of biochar-based 2D membranes were mainly focused on adsorption and filtration for water purification. Taking advantage of the membrane, good separation for alcohol and water mixture was also achieved (Lan et al 2016(Lan et al , 2018. Other applications of biochar-based membrane include controlled-release fertilizer (Zhou et al 2015), and enhanced degradation of organic pollutants by Absorb a wide range of organic solvents and oils with excellent recyclability and selectivity Wu et al (2013b) attaching enzyme (Taheran et al 2017).…”

Section: Biochar-based 2d Membranementioning

confidence: 99%

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Wang

et al. 2020

Biochar

125

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The development of biochar has triggered a hot-spot in various research fields including agriculture, energy, environment, and materials. Biochar-based materials provide a novel approach against environmental challenging issues. Considering the rapid development of biochar materials, this review serves as a valuable platform to summarize the recent progress on the theoretical investigation and engineering applications of biochar materials in environmental remediation. For a better understanding of the structure-application relationships, the structural properties of biochar from macroscopic and microscopic aspects are summarized. The multilevel structures including elements, phases, surface chemistry, and molecular are highlighted to elucidate the multi-functional properties of biochars. Sorption, catalysis, redox reaction, and biological activity of biochar are briefly illustrated, which influence the transport, transformation, and removal of organic and inorganic pollutants in the environments. According to the multi-level structures and structure-application relationships of biochar, specific biocharbased materials and devices have been designed for practical environmental application. The important progress on the functionalization and device of biochar-based materials, including magnetic biochars, 2D and 3D biochar-based macrostructures, immobilized microorganism on biochar, and biochar-amended biofilters are highlighted. The environmental friendliness and sustainability of biochar-based materials, considering the whole cycle from synthesis to application, are evaluated.

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“…Hybrid membranes were prepared based on our previously reported method [25]. The procedure is schematically shown in Figure 1.…”

Section: Preparation Of Hybrid Membranesmentioning

confidence: 99%

Modified Silica Incorporating into PDMS Polymeric Membranes for Bioethanol Selection

Peng

Lan

Luo

2019

Advances in Polymer Technology

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In this work, polydimethylsiloxane (PDMS) polymeric membranes were fabricated by incorporating fumed silica nanoparticles which were functionalized with two silane coupling agents—NH2(CH2)3Si(OC2H5)3(APTS) and NH2(CH2)2NH(CH2)3Si(OC2H5)3(TSED)—for selective removal of ethanol from aqueous solutions via pervaporation. It was demonstrated that large agglomerates were not observed indicating the uniform distribution of modified silica throughout the PDMS matrices. It is noted that the ethanol diffusivity and the water contact angles were both increased remarkably, being beneficial to the preferential permeation of ethanol through the membranes. The pervaporation results showed that the addition of the two types of modified silica nanoparticles dramatically enhanced both the permeability and selectivity of hybrid membranes. Compared to APTS, silica modified by TSED at the concentration of 4 wt. % resulted in the optimum pervaporation membranes with the maximum separation factor of 12.09 and the corresponding permeation flux of approximately 234.0 g·m−2·h−1in a binary aqueous mixture at 40°C containing 10 wt. % ethanol. The observation will benefit the choice of coupling agents to improve the compatibility between hydrophilic fillers and hydrophobic polymers in preparing mixed matrix membranes.

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Application of PDMS pervaporation membranes filled with tree bark biochar for ethanol/water separation

Abstract: This study has shown, for the first time, the promise of tree bark biochar as fillers for improving selectivity index and separation flux of polydimethylsiloxane (PDMS) pervaporation membranes for ethanol/water separation.

Cited by 20 publications

References 19 publications

Effect of embedded activated carbon nanoparticles on the performance of polydimethylsiloxane (PDMS) membrane for pervaporation separation of butanol

Effect of embedded activated carbon nanoparticles on the performance of polydimethylsiloxane (PDMS) membrane for pervaporation separation of butanol

Application of biochar-based materials in environmental remediation: from multi-level structures to specific devices

Modified Silica Incorporating into PDMS Polymeric Membranes for Bioethanol Selection

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