Hydrothermal carbonization of various lignocellulosics: Fuel characteristics of hydrochars and surface characteristics of activated hydrochars

Kabakcı, Sibel Başakçılardan; Baran, Sümeyra Seniha

doi:10.1016/j.wasman.2019.09.021

Cited by 97 publications

(35 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results are shown in Table 2. Initially, the ROP had percentages of carbon and oxygen of about 43% and 47%, respectively, which are similar to the majority of lignocellulosicbased feedstocks reported in the literature [34]. As for the solid fraction of OMWW, carbon and oxygen contents were 57% and 32%, respectively.…”

Section: Proximate Ultimate and Elemental Analysessupporting

confidence: 74%

Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Azzaz¹,

Jeguirim²,

Marks³

et al. 2021

Comptes Rendus. Chimie

View full text Add to dashboard Cite

show abstract

Section: Proximate Ultimate and Elemental Analysessupporting

confidence: 74%

Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Azzaz¹,

Jeguirim²,

Marks³

et al. 2021

Comptes Rendus. Chimie

View full text Add to dashboard Cite

show abstract

“…Similarly, Wang et al (2020) reported that surface area of hydrochar increased from 4.78 m 2 /g to 40.38 m 2 /g because of the presence of ZVI on hydrochar surface. However, it was observed that surface area of composites did not always increased as ZVI ratio increased, because the surface area of hydrochar was free from influence of HTC conditions (Kabakc & Bara 2019), and extra ZVI particles may have blocked the active sites and reduced the effective contact area in the hydrochar (Li et al 2020).…”

Section: Bet Surface Area and Sem Analysismentioning

confidence: 99%

Synthesis of hydrochar supported zero-valent iron composites through hydrothermal carbonization of granatum and zero-valent iron: potential applications for Pb2+ removal

Jia

Tang²,

2021

Water Science and Technology

View full text Add to dashboard Cite

In the present investigation, a one-step synthesis of hydrochar (HC) supported zero-valent iron (ZVI) was performed through hydrothermal carbonization (HTC) of granatum and ZVI. According to XRD, XPS, and FTIR data, ZVI was evenly distributed on the surface of the hydrochar. In addition, the external ZVI oxide layer and the functional groups present in the hydrochar remained on the surface of the HC/ZVI composites after HTC treatment. The surface area of the HC/ZVI composites was between 31.11 and 44.16 m2/g. These numbers were higher than those obtained for hydrochar (20.36 m2/g) and ZVI (12.14 m2/g) separately. The Pb2+ adsorption capacity of hydrochar and ZVI was 28.64 and 192.44 mg/g, respectively (25 °C, pH = 6.05, Pb2+ concentration of 200 mg/L with 0.05 g HC and 0.01 g ZVI). In addition, the adsorption capacity of the composites was between 49.63 and 88.09 mg/g. The data obtained for Pb2+ removal by the samples used in this experiments fitted well the pseudo-second-order kinetics and Langmuir isotherm models. Therefore, hydrochar may represent a promising supporting material for the synthesis of ZVI composites.

show abstract

“…Physical and chemical activation can increase the SSA of chars up to 1000 m 2 g À1 , and to generate high porosity due to the alteration and opening of the internal porous structure (Başakçılardan Kabakcı & Baran, 2019;Gratuito et al, 2008;Hao et al, 2013;Jain et al, 2016).…”

Section: Engineering Pore Characteristics Of Hydrochars For Improved Shelter Provisionmentioning

confidence: 99%

Pore characteristics of hydrochars and their role as a vector for soil bacteria: A critical review of engineering options

Thunshirn

Wenzel

Pfeifer

2021

Critical Reviews in Environmental Science and Technology

View full text Add to dashboard Cite

Hydrothermal carbonization (HTC) is the method of choice to convert wet waste biomass to hydrochars. Their porous structure can serve as a microenvironment to plantgrowth-promoting rhizobacteria (PGPR), supporting their growth, survival, and activities. As published work lacks the systematic compilation of pore characteristics of hydrochars related to bacterial colonization, we collect available data and elaborate on their dependence on the carbonization process conditions, feedstocks, and methodology of pore system characterization. Our analysis indicates a high abundance of pores sized between 1 and 20 lm relevant for the protection of PGPR from predators, and of nutrients and labile C in hydrochars supporting bacterial growth. In addition to the selection of optimized process parameters and feedstocks (240-260 C, low feedstock pH, nonlignocellulosic biomass), adding mineral amendments prior to HTC offers opportunities for engineering hydrochars with an even larger share of pore space suited for bacterial colonization. Using the comprehensive literature on biochars, we demonstrate that the interior pore space in chars determines the potential to serve as an inoculum carrier to PGPR, thereby enhancing nutrient acquisition and protecting plants from diseases and abiotic stresses. The pore characteristics of hydrochars are comparable to biochars, and hydrochars are generally superior in providing a labile C reservoir that PGPR can readily access. We argue that HTC provides a cost-effective conversion route to produce PGPR vectors/carriers from wet (waste) biomass serving various environmental management objectives (waste recycling, soil fertility, soil remediation technologies) and circular bioeconomy (sustainable agriculture, substituting non-renewable carrier materials and fertilizers). HIGHLIGHTSWe review the role of pore characteristics of hydrochars for bacterial colonization We identify opportunities for engineering hydrochars to provide favorable habitat conditions to PGPR 240-260 C, low pH, non-lignocellulosic feedstocks, and adding mineral amendments increase the habitable pore space Hydrochars offer suitable pore characteristics and high labile C amounts and are promising PGPR carriers/vectors CONTACT Walter W. Wenzel

show abstract

Hydrothermal carbonization of various lignocellulosics: Fuel characteristics of hydrochars and surface characteristics of activated hydrochars

Cited by 97 publications

References 105 publications

Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Physico-chemical properties of hydrochars produced from raw olive pomace using olive mill wastewater as moisture source

Synthesis of hydrochar supported zero-valent iron composites through hydrothermal carbonization of granatum and zero-valent iron: potential applications for Pb2+ removal

Pore characteristics of hydrochars and their role as a vector for soil bacteria: A critical review of engineering options

Contact Info

Product

Resources

About