Bio-butanol sorption performance on novel porous-carbon adsorbents from corncob prepared via hydrothermal carbonization and post-pyrolysis method

Han, Mengjun; Jiang, Kangkang; Jiao, Pengfei; Ji, Yingchun; Zhou, Jingwei; Zhuang, Wei; Chen, Yong; Liu, Dong; Zhu, Chenjie; Chen, Xiaochun; Wu, Jinglan

doi:10.1038/s41598-017-12062-7

Cited by 24 publications

(10 citation statements)

References 55 publications

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“…Hydrochar produced by HTC contains 80–90% of the energy content of the original feed and 55–90% mass of the original mass of biomass 12 . Research on hydrocar synthesis from hydrothermal carbonization is at an early stage and most studies have focused mainly on the effect of parameters used for the carbonization on the yield and the characteristics of hydrochar produced 13 . The applications of hydrochar include; as a carbon material’ an amendment of soil; a solid fuel, which is comparable to brown coal for production of energy; a substitute for activated carbon or carbon black; a carbon catalyst used for production of fine chemicals; a material to increase the efficiency of fuel cells, and; as an absorbent to increase fertility and productivity of soil 14–22 .…”

Section: Introductionmentioning

confidence: 99%

“…The hydrochar also contains polar superficial functional groups which tend to lower the adsorption of non-polar organic matter. Furthermore, hydrochar has lower stability which suggests that hydrochar is not a long-term and recyclable adsorbent 13 . Therefore, this study proposes a novel application of hydrochar as filler in polymer composites.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of polylactide/rice husk hydrochar composite

Nizamuddin

Jadhav

Qureshi

et al. 2019

Sci Rep

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Polymer composites are fabricated by incorporating fillers into a polymer matrix. The intent for addition of fillers is to improve the physical, mechanical, chemical and rheological properties of the composite. This study reports on a unique polymer composite using hydrochar, synthesised by microwave-assisted hydrothermal carbonization of rice husk, as filler in polylactide matrix. The polylactide/hydrochar composites were fabricated by incorporating hydrochar in polylactide at 5%, 10%, 15% and 20 wt% by melt processing in a Haake rheomix at 170 °C. Both the neat polylactide and polylactide/hydrochar composite were characterized for mechanical, structural, thermal and rheological properties. The tensile modulus of polylactide/hydrochar composites was improved from 2.63 GPa (neat polylactide) to 3.16 GPa, 3.33 GPa, 3.54 GPa, and 4.24 GPa after blending with hydrochar at 5%, 10%, 15%, and 20%, respectively. Further, the incorporation of hydrochar had little effect on storage modulus (G′) and loss modulus (G″). The findings of this study reported that addition of hydrochar improves some characteristics of polylactide composites suggesting the potential of hydrochar as filler for polymer/hydrochar composites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of polylactide/rice husk hydrochar composite

Nizamuddin

Jadhav

Qureshi

et al. 2019

Sci Rep

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“…In Eq. 2, the fittable parameters are the kinetic constant rate K in (g g −1 h 1/2 ), and C (g g −1 ) which is a constant depending on the type of the boundary layer 64 . Accordingly, the data in Fig.…”

Section: Resultsmentioning

confidence: 99%

A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge

Georgiou

Rapti

Mavrogiorgou

et al. 2020

Sci Rep

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Exposure of humans to Arsenic from groundwater drinking sources is an acute global public health problem, entailing the urgent need for highly efficient/low-cost Arsenite (As iii) up-taking materials. Herein we present an innovative hybrid-material, ZrMOF@SF d operating like an "As iii-sponge" with unprecedented efficiency of 1800 mg As iii gr −1. ZrMof@SF d consists of a neutral Zirconium Metal-Organic Framework [ZrMOF] covalently grafted on a natural silk-fiber (SF d). ZrMOF itself exhibits As iii adsorption of 2200 mg gr −1 , which supersedes any-so far-known As ΙΙΙ-sorbent. Using XPS, FTIR, BETporosimetry data, together with theoretical Surface-Complexation-Modeling (SCM), we show that the high-As ΙΙΙ-uptake is due to a sequence of two phenomena:[i] at low As iii-concentrations, surfacecomplexation of H 3 Aso 3 results in As iii-coated voids of ZrMOF, [ii] at increased As iii-concentrations, the As iii-coated voids of ZrMOF are filled-up by H 3 Aso 3 via a partitioning-like mechanism. in a more general context, the present research exemplifies a mind-changing concept, i.e. that a "partitioning-like" mechanism can be operating for adsorption of metalloids, such as H 3 Aso 3, by metal oxide materials. So far, such a mechanism has been conceptualized only for the uptake of non-polar organics by natural organic matter or synthetic polymers. Arsenic exposure through drinking water sourced from groundwater, is a global public health problem that is particularly devastating in certain highly populated countries 1,2. According to a 2000 to 2010 case study, 35 to 77 million people in areas of Bangladesh or India have been chronically exposed to arsenic in their drinking water in what described as the most significant mass poisoning in history 3. Arsenic is a naturally occurring metalloid, also released to the environment via anthropogenic activities. Arsenic strongly binds to proteins, so traces of this element can cause severe health problems to all life forms 4. The predominant forms of arsenic in the aquatic environment are As III (arsenite) and As V (arsenate). As III is more hazardous than As V , as it is more mobile/bioavailable, thus more toxic 5. This toxicity is due to its dominant H 3 AsO 3 form, i.e. the predominating species in a wide range of pH < 9 6 , typically encountered in natural waters. So far, traditional ion-exchange materials and sorbents, e.g. zeolites, clays, layered double hydroxides, resins have been used as arsenic adsorbends, however, with limited efficiency vs. As III 7,8. Given that As V , which exists as anion at pH > 2, is easier to adsorb on cationic surfaces, to overcome the low efficiency of As III uptake, an extra step of oxidation of As III to As V can be chosen before the application of various remediation technologies. Such oxidative pretreatment, however, suffers from the presence of multiple substances that interfere with As III oxidation 9,10. Therefore, it will be desirable to develop sorbents that could directly capture As III in natural pH conditions, without the need for ...

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“…A subsequent activation can act as a further carbonization step increasing the aromatic content, the porosity and the stability of the hydrochars [13]. Steam is used in physical activation tests [19][20][21]; for chemical activation KOH, NaOH or H 3 PO 4 are used. For example, KOH acts as a catalyst and oxidizing agent, and the occurring reactions can be understood as in situ alkali-catalyzed gasification; specific surface areas up to 2.000 m 2 /g were obtained, which can mainly be attributed to the formation of small micropores with diameters less than 2 nm [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Breaking of Lignin and Mesopore Formation in Zinc Chloride Assisted Hydrothermal Carbonization of Waste Biomasses

Multhaupt

Bottke

Wark

2021

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Hydrochars from hydrothermal carbonization of different biowaste materials (dried dandelion, sawdust, coconut shell powder) formed in the presence of aqueous salt solutions were compared to those obtained by the common method in pure water. Hydrochars with increased carbon contents, pore volume and surface areas were specifically obtained from coconut shell powder in the presence of zinc chloride. Compositional and structural changes within the hydrochar products caused by the process conditions and/or the additive were characterized by solid state 13C NMR spectroscopy, proving that cellulose and, in particular, lignin units in the biomass are more easily attacked in the presence of the salt. Under saline conditions, a distinct particle break-up led to the creation of mesoporosity, as observable from hysteresis loops in nitrogen adsorption isotherms, which were indicative of the presence of pores with diameters of about 3 to 10 nm. The obtained hydrochars were still rich in functional groups which, together with the mesoporosity, indicates the compounds have a high potential for pollutant removal. This was documented by adsorption capacities for the methylene blue and methyl orange dyes, which exceeded the values obtained for other hydrochar-based adsorbers. A subsequent physical activation of the mesoporous hydrochars in steam at different temperatures and times resulted in a further drastic increase in the surface areas, of up to about 750 m2/g; however, this increase is mainly due to micropore formation coupled with a loss of surface functionality. Consequently, the adsorption capacity for the quite large dyes does not provide any further benefit, but the uptake of smaller gas molecules is favored.

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Bio-butanol sorption performance on novel porous-carbon adsorbents from corncob prepared via hydrothermal carbonization and post-pyrolysis method

Cited by 24 publications

References 55 publications

Synthesis and characterization of polylactide/rice husk hydrochar composite

Synthesis and characterization of polylactide/rice husk hydrochar composite

A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge

Enhanced Breaking of Lignin and Mesopore Formation in Zinc Chloride Assisted Hydrothermal Carbonization of Waste Biomasses

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