Pyrolysis polygeneration of pine nut shell: Quality of pyrolysis products and study on the preparation of activated carbon from biochar

Chen, Dengyu; Chen, Xiaojuan; Sun, Jun; Zheng, Zhongcheng; Fu, Kexin

doi:10.1016/j.biortech.2016.05.107

Cited by 141 publications

(48 citation statements)

References 26 publications

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“…As can be seen, the graphs indicate that increasing of temperature and activating time tend to reduce the yield. This phenomenon was comparable with the results from some researches [4,7,10,15]. Rising of activation time causes increasing burn-off grade and decrease the activated carbon yield.…”

Section: Analysis Of Surface Areasupporting

confidence: 91%

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The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

2018

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Abstract. Activated carbon from bio-char waste of bio oil pyrolysis of mixed sugarcane bagasse and Rambutan twigs was investigated. Bio-char as by-product of bio-oil pyrolysis has potential to be good adsorbed by activating process. Bio-chars waste was activated in fixed bed reactor inside furnace without presenting oxygen. Gas N2 and CO2 were employed to drive out oxygen from the reactor and as activator, respectively. One of the best activation treatments is achieved by performing activation in different temperature and time to produce standard activated carbon. The experiment was performed at different temperatures and activation time, i.e. 800, 850, and 900 C and 80 and 120 minutes, respectively, to determine the optimal operating condition. Activated carbon was characterized by analysis of moisture content, ash content pH, and methylene blue test. The results showed that optimum activation was at 850C and 80 minute, where activated carbon produced indicated the best adsorption capacity. The ash content and pH had significant role in resulting good activated carbon.

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Section: Analysis Of Surface Areasupporting

confidence: 91%

“…Chen et.al. [15] from their study indicated that lower retention time and higher temperature (above 850°C) could transformed micropores into mesopores or even macropores, resulting in low value of methylene blue adsorption. In outline, Figure 5 and 7 exhibited that high pH could increase methylene blue adsorption.…”

Section: Methylene Blue Adsorptionmentioning

confidence: 99%

The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

2018

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“…At this stage, the SBET for BC and RHC reached their maximum values of 259.89 m 2 /g and 331.23 m 2 /g, respectively; the rate of micropore volume (VMic/VTot) also reached its maximum values. However, compared with other bio-char, the maximum SBET of BC and RHC was slightly lower than pine nut shell bio-char (433.1 m 2 /g) (Chen et al 2016a) and poplar wood bio-char (411.06 m 2 /g) (Chen et al 2016b). The differences in BET results might be caused by the different biomass materials and operating conditions (temperature, flow rate of carrier gas, residence time, etc.)…”

Section: Pore Structure Analysismentioning

confidence: 95%

Comparison of the Physicochemical Characteristics of Bio-char Pyrolyzed from Moso Bamboo and Rice Husk with Different Pyrolysis Temperatures

Zhang¹,

Ma²,

Zhang³

et al. 2017

BioResources

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Bio-char pyrolyzed from biomass waste has been notably applied in various industries due to its versatile physicochemical characteristics. This paper investigated the difference of the properties of the bio-char derived from moso bamboo and rice husk under different pyrolysis temperatures (200 °C to 800 °C). As the temperature increased, the biochar yield for both bamboo bio-char (BC) and rice husk bio-char (RHC) decreased, while the carbon element content and fixed carbon, the value of higher heating value (HHV) and pH increased for both BC and RHC. At 800 °C, BC had a higher HHV of 32.78 MJ/kg than RHC of 19.22 MJ/kg, while RHC had a higher yield of char (42.99 wt.%) than BC (26.3 wt.%) because of the higher ash content (47.51 wt.%) in RHC. SiO2 was the dominant component in the ash of RHC, accounting for 86.26 wt.%. The surface area (SBET) of RHC (331.23 m 2 /g) was higher than BC (259.89 m 2 /g). However, the graphitization degree of BC was higher than RHC at the same temperature. The systematic study on the evolution of the basic properties of BC and RHC will provide a good reference for their high value-added application.

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“…Due to its abundance and availability, agricultural waste – such as pine nut shell, coconut shell and apricot stone – is being used extensively as a low‐cost precursor in the preparation of AC. Other interesting materials that can be useful for producing AC are wastes from the fisheries industry, such as fish scales due to their collagen content surrounded by hydroxyapatite and calcium compounds that have adsorptive properties …”

Section: Introductionmentioning

confidence: 99%

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

Poblete

Cortés

Bakit

et al. 2020

J of Chemical Tech & Biotech

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This study focuses on the removal of organic pollutants present in landfill leachate (LL) using an adsorption process with activated carbon (AC) obtained from fish scales, and subsequently evaluates the reduction of toxicity in the wastewater obtained from the process. The AC obtained is a mesoporous material, with a cumulative pore area of 1.57 m2 g−1, Brunauer–Emmett–Teller (BET) of 1.8329 m2 g−1 and adsorption average pore width of 12.79833 nm. The maximum removal of pollutants was achieved at natural pH (6.71) of the LL, with a load of 3 g L−1, resulting in 60.1% colour and 37.3% chemical oxygen demand (COD). The rate of COD removal per g of AC increase had a maximum value of 5.6 at pH 10 when passing from 0.5 to 1 g AC. The lowest rate of 0.6 occurred for the same pH when it passed from 1 to 2 g AC. At pH 3 the second lowest rate of 3.3 was observed when passing from 2 to 3 g AC. At pH 3 there was always an increase in the rate as more AC was added. Conversely, at natural pH 6.71 the rate tended to decrease. At pH 10 the rate first decreased and then increased. At acidic pH, because it is the one with the lowest COD removal, it would be expected that by adding more AC the rate would continue to increase as there are easily accessible sites still available. Langmuir isotherms fitted adequately with the experimental data, providing an R2 of 0.9657, which is consistent with a monolayer adsorption pattern. The LL before the adsorption process had an inhibition ratio of 20.4%, due to the fact that leachate can be toxic because of the presence of hazardous organic compounds. After adsorption processes at pH 6.71, the inhibition ratios were 16.9%, 13.8%, 12.2% and 10.9% at AC loads of 0.5, 1, 2 and 3 g L−1, respectively, due to decreasing COD and colour of the LL over the course of the treatment. It was observed that the reduction of the inhibition ratio was greater at higher loads of adsorbent. © 2020 Society of Chemical Industry

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Pyrolysis polygeneration of pine nut shell: Quality of pyrolysis products and study on the preparation of activated carbon from biochar

Cited by 141 publications

References 26 publications

The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

The potential of activated carbon derived from bio-char waste of bio-oil pyrolysis as adsorbent

Comparison of the Physicochemical Characteristics of Bio-char Pyrolyzed from Moso Bamboo and Rice Husk with Different Pyrolysis Temperatures

Use of fish scales as an adsorbent of organic matter present in the treatment of landfill leachate

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