Designing and Performance Evaluation of Biochar Production in a Top-Lit Updraft Up-scaled Gasifier

Nsamba, Hussein Kisiki; Hale, Sarah E.; Cornelissen, Gerard; Bachmann, Robert Thomas

doi:10.4236/jsbs.2015.52004

Cited by 18 publications

(7 citation statements)

References 27 publications

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“…N, 1.3±0.5% P, 0.2±0.1% K, 94.0±21.3mg kg -1 Cu, 88.8±21.0mg kg -1 Zn, 18±3mg kg -1 Mo, 4.0±0.8mg kg -1 As, 0.80±0.26mg kg -1 Cd, 20±9mg kg -1 Pb, and 3.6±0.6mg kg -1 Ni. Biochar was produced in a modified custom designed Top-lit Updraft retort kiln, which is a micro-kiln that uses a reburner to eliminate volatile by-products of pyrolization (NSAMBA et al, 2015). Both, particulates, as well as the non-condensable gases, are combusted to provide heat for driving the pyrolysis reaction.…”

Section: Sewage Sludge Collection and Biochar Productionmentioning

confidence: 99%

Potential impacts of using sewage sludge biochar on the growth of plant forest seedlings

et al. 2017

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Section: Sewage Sludge Collection and Biochar Productionmentioning

confidence: 99%

Potential impacts of using sewage sludge biochar on the growth of plant forest seedlings

et al. 2017

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“…The top-lit updraft gasifier (TLUD) also known as inverter downdraft gasifier has the capabilities to produce syngas and biochar simultaneously [23]. Most of the published work on TLUDs has been focused on the application of this reactor for cooking purposes in developing countries since it generates low pollutant emissions with relatively high efficiency [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Biomass Physical Properties on Top-Lit Updraft Gasification of Woodchips

2016

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Abstract:The performance of a top-lit updraft gasifier affected by biomass (pine wood) particle size, moisture content and compactness was studied in terms of the biochar yield, biomass burning rate, syngas composition and tar content. The highest biochar yield increase (from 12.2% to 21.8%) was achieved by varying the particle size from 7 to 30 mm, however, larger particles triggered tar generation that reached its maximum of 93.5 g/m 3 syngas at 30-mm biomass particles; in contrast, the hydrogen content in syngas was at its minimum of 2.89% at this condition. The increase in moisture content from 10% to 22% reduced biochar yield from 12% to 9.9%. It also reduced the tar content from 12.9 to 6.2 g/m 3 which was found to be the lowest range of tar content in this work. Similarly, the carbon monoxide composition in syngas decreased to its minimum of 11.16% at moisture content of 22%. Finally, the biomass compactness increased biochar yield up to 17% when the packing mass was 3 kg. However, the addition of compactness also increased the tar content in syngas, but little effect was noticed in syngas composition.

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“…The soil was classified as a Yellow Ultisol (SANTOS et al, 2013). Biochars were produced from coconut husks and orange bagasse, in a slow pyrolysis reactor, a Top-Lit Updraft retort unit, which is a micro-kiln that uses a reburner to eliminate volatile byproducts of pyrolization (NSAMBA et al, 2015), at approximately 500 o C. Biochar characteristics are presented in Table 1. The experiment was conducted as a completely randomized design in a 2 x 5 factorial scheme, with two types of biochar (coconut husk and orange bagasse) and 5 rates of application (0, 5, 10, 15 and 30 t ha -1 ), with three replications.…”

Section: Methodsmentioning

confidence: 99%

Type and quantity of biochar influenced soil microbial activity and carbon priming effect

Carvalho

Gonzaga

Almeida

et al. 2019

SCA

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Biochar has shown much potential to be used as soil amendment and conditioner as well as an effective alternative to waste disposal. However, the effect of biochar on soil organic matter varies according to the type of feedstock. This study aimed to evaluate the influence of different types and rates of application of biochar on soil microbial activity and on soil carbon priming effect. The incubation experiment was set up as a completely randomized design in a 2 x 5 factorial scheme, with two types of biochar (coconut husk and orange bagasse) and five rates of application (0, 5, 10, 15 and 30 t ha-1), with three replications. Soil microbial activity was evaluated through the concentration of CO2 released from the soil during a period of 130 days. Carbon priming effect was determined based on the CO2 respired in the biochar treated soil and in the control soil. Both biochars increased the total oxidizable carbon in the soil when they were applied at 30 t ha-1, however, the orange bagasse biochar was more effective than the coconut biochar. Coconut biochar increased the cumulative soil microbial respiration at all rates of application during the incubation period, therefore, it contributed to a positive carbon priming effect and should be applied with caution to avoid excessive loss of carbon from the soil. Orange bagasse biochar had little influence on the cumulative CO2 emission, except at 15 t ha-1, which increased soil microbial activity.

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Designing and Performance Evaluation of Biochar Production in a Top-Lit Updraft Up-scaled Gasifier

Cited by 18 publications

References 27 publications

Potential impacts of using sewage sludge biochar on the growth of plant forest seedlings

Potential impacts of using sewage sludge biochar on the growth of plant forest seedlings

The Effect of Biomass Physical Properties on Top-Lit Updraft Gasification of Woodchips

Type and quantity of biochar influenced soil microbial activity and carbon priming effect

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