Investigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement Design

Walters, Renaldo C.; Begum, Shamim Ara; Fini, Elham H.; Abu-Lebdeh, Taher

doi:10.3844/ajeassp.2015.138.146

Cited by 14 publications

(8 citation statements)

References 19 publications

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“…Pig-manure-derived char (BM), was recovered as a waste after a 280 • C hydrothermal treatment process [55,56]. This initial sample (BM) was subjected to various treatments including pyrolysis and chemical activation.…”

Section: Methodsmentioning

confidence: 99%

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

Wallace

Suresh

Fini

et al. 2017

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Abstract:Biochar from the liquefaction of pig manure was used as a precursor of H 2 S desulfurization adsorbents. In its inorganic matter, it contains marked quantities of calcium, magnesium and iron, which are known as hydrogen sulfide oxidation catalysts. The char was used either as-received or mixed with 10% nanographite. The latter was added to increase both the content of the carbon phase and conductivity. ZnCl 2 in two different ratios of char to an activation agent (1:1 and 1:2) was used to create the porosity in the carbon phase. The content of the later was between 18-45%. The activated samples adsorbed 144 mg/g H 2 S. Sulfur was the predominant product of reactive adsorption. Its deposition in the pore system and blockage of the most active pores ceased the materials' activity. The presence of the catalytic phase was necessary but not sufficient to guarantee good performance. The developed porosity, which can store oxidation products in the resulting composite, is essential for the good performance of the desulfurization process. The surface of the composite with nanographite showed the highest catalytic activity, similar to that of the commercial Midas ® carbon catalyst. The results obtained indicate that a high quality reactive adsorbent/catalyst for H 2 S removal can be obtained from pig manure liquefaction wastes.

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Section: Methodsmentioning

confidence: 99%

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

Wallace

Suresh

Fini

et al. 2017

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“…[12] emphasized that biochar has excellent insulating properties, improves air quality, soaks moisture, protects from radiation and allows buildings to be turned into carbon sinks. [14] found that SB improved dispersion and liquid retention in asphalt concrete, while enhancing oxidation resistance. Biochar in buildings could reduce environmental degradation [12].…”

Section: Introductionmentioning

confidence: 94%

The Influence of Swine-Waste Biochar on the Early-Age Characteristics of Cement Paste

Ofori-Boadu¹,

Kelley²,

Aryeetey³

et al. 2017

IJERA

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The purpose of this research was to investigate the influence of swine-waste biochar (SB) on the early-age characteristics of cement pastes. Using a water/binder ratio of 0.28, SB modified cement pastes were analyzed using Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), flow, and Vicat setting tests. Notably, SB reduced the flow and initial setting times of SB modified cement pastes. Due to its porous and negatively charged surfaces, capillary water was adsorbed into the pores of the carbonaceous SB and this reduced the flow of the SB modified cement pastes. Furthermore, it is suspected that the reductions in initial setting times may have been because with the addition of water to the dry SB/cement binder mix, chemical reactions between the calcium cations from Portland cement and carboxylate anions from SB resulted in the development of Calcium Polycarboxylate Salts (C-P-S). Improvements in the properties of SB could enhance its applications in rapid-setting and flow-reducing concrete.

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“…The oxidation of asphalt binders is an inevitable phenomenon that plays an enormous role in the deterioration of asphalt binders. In fact, the life expectancy of usual binders is susceptible to ultraviolet (UV) rays, which cause faster oxidation of asphalts, with a sensitive reduction in rheological characteristics and a loss of rutting properties, which can lead to pavement distress [ 90 ]. Walters et al [ 91 ] investigated the impact of added biochar particles (coming from a thermochemical process used to convert swine manure in bio-oil) or nano-clay (Cloesite 30B) on the rheological properties and ageing susceptibility of asphalt binder, and compared the results with a control asphalt (PG 64–22) binder.…”

Section: Asphalts Composites Containing Bcpmentioning

confidence: 99%

Sustainable Materials Containing Biochar Particles: A Review

Infurna,

Caruso,

Dintcheva

2023

Polymers

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The conversion of polymer waste, food waste, and biomasses through thermochemical decomposition to fuels, syngas, and solid phase, named char/biochar particles, gives a second life to these waste materials, and this process has been widely investigated in the last two decades. The main thermochemical decomposition processes that have been explored are slow, fast, and flash pyrolysis, torrefaction, gasification, and hydrothermal liquefaction, which produce char/biochar particles that differ in their chemical and physical properties, i.e., their carbon-content, CHNOS compositions, porosity, and adsorption ability. Currently, the main proposed applications of the char/biochar particles are in the agricultural sector as fertilizers for soil retirement and water treatment, as well as use as high adsorption particles. Therefore, according to recently published papers, char/biochar particles could be successfully considered for the formulation of sustainable polymer and biopolymer-based composites. Additionally, in the last decade, these particles have also been proposed as suitable fillers for asphalts. Based on these findings, the current review gives a critical overview that highlights the advantages in using these novel particles as suitable additives and fillers, and at the same time, it shows some drawbacks in their use. Adding char/biochar particles in polymers and biopolymers significantly increases their elastic modulus, tensile strength, and flame and oxygen resistance, although composite ductility is significantly penalized. Unfortunately, due to the dark color of the char/biochar particles, all composites show brown-black coloration, and this issue limits the applications.

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Investigating Bio-Char as Flow Modifier and Water Treatment Agent for Sustainable Pavement Design

Cited by 14 publications

References 19 publications

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

Efficient Air Desulfurization Catalysts Derived from Pig Manure Liquefaction Char

The Influence of Swine-Waste Biochar on the Early-Age Characteristics of Cement Paste

Sustainable Materials Containing Biochar Particles: A Review

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