Gasification of Biochar from Empty Fruit Bunch in a Fluidized Bed Reactor

Nsamba, Hussein Kisiki; Salleh, Mohamad Amran Mohd; Yusuf, Hindatu; Ghani, Wan Azlina Wan Ab Karim

doi:10.3390/en3071344

Cited by 33 publications

(14 citation statements)

References 21 publications

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“…Pyrolysis is a process of thermochemical decomposition of biomass at high temperatures (from 225-850 • C) with the absence of oxygen [14][15][16]. The characteristics of biochar depend on the thermal conversion process type (pyrolysis method and temperature) and the biomass source [17].…”

Section: Introductionmentioning

confidence: 99%

Poinsettia Growth and Development Response to Container Root Substrate with Biochar

et al. 2018

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A greenhouse study was conducted to evaluate the growth and development of poinsettia 'Prestige Red' (Euphorbia pulcherrima) grown in a commercial peat-based potting mix (Sunshine Mix #1) amended with biochar at 0%, 20%, 40%, 60%, 80%, or 100% (by volume) at four different fertigation regimes: F1: 100 to 200 mg·L −1 nitrogen (N), F2: 200 to 300 mg·L −1 N (control), F3: 300 to 400 mg·L −1 N, or F4: 400 to 500 mg·L −1 N. The experiment was a two-factor factorial design with 10 replications for each combination of biochar by fertigation. As the percentage of biochar increased, root substrate pore space and bulk density increased, while container capacity decreased. Root rot and red bract necrosis only occurred in F4 combined with 100% biochar. Plants grown in 40% biochar had a similar growth and development to those in 0% biochar. Up to 80% biochar, plants exhibited no significant change, except in terms of dry weight, which decreased at higher biochar percentages (60% and 80%). In summary, at a fertigation rate of 100 mg·L −1 N to 400 mg·L −1 N, up to 80% biochar could be used as an amendment to peat-based root substrate with acceptable growth reduction and no changes in quality.

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Section: Introductionmentioning

confidence: 99%

Poinsettia Growth and Development Response to Container Root Substrate with Biochar

et al. 2018

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“…In the process of biomass gasification, the first step is pyrolysis. The gas component products after pyrolysis are non-condensable gases and tars, and char is left as a solid residue [2]. Due to the irregular shape and low density of char particles, it is difficult to attain a stable fluidization status.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of the Restitution Coefficient Impact on Simulating Sand-Char Mixing in a Bubbling Fluidized Bed

Zhao¹,

Eri²,

Wang³

2017

Energies

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Abstract:In the present work, the effect of the restitution coefficient on the numerical results for a binary mixture system of sand particles and char particles in a bubbling fluidized bed with a huge difference between the particles in terms of density and volume fraction has been studied based on two-fluid model along with the kinetic theory of granular flow. Results show that the effect of restitution coefficient on the flow characteristics varies in different regions of the bed, which is more evident for the top region of the bed. The restitution coefficient can be categorized into two classes. The restitution coefficients of 0.7 and 0.8 can be included into one class, whereas the restitution coefficient of 0.9 and 0.95 can be included into another class. Moreover, four vortices can be found in the time-averaged flow pattern distribution, which is very different from the result obtained for the binary system with the similar values between particles in density and volume fraction.

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“…Table 1 presents the results of the proximate and ultimate analyses and heating value of the char, as well as the results obtained for the original sewage sludge. The fixed carbon content in this kind of char is considerably lower than in other types of biomass chars [18][19][20][21][22] as the composition of sewage sludge and lignocellulosic materials are quite different.…”

Section: Introductionmentioning

confidence: 74%

Air-steam gasification of char derived from sewage sludge pyrolysis. Comparison with the gasification of sewage sludge

Gil-Lalaguna¹,

Sánchez²,

Murillo³

et al. 2014

Fuel

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Air-steam gasification of char derived from fast pyrolysis of sewage sludge has been experimentally evaluated in a fluidized bed as a route towards a full recovery of energy from sewage sludge. The results have been compared with those obtained from the direct gasification of sewage sludge in order to evaluate how the previous pyrolysis stage affects the subsequent gasification process. The fixed carbon content in the solid increased after the pyrolysis stage so that heterogeneous reactions of carbon with steam or CO 2 assumed greater importance during char gasification than during sewage sludge gasification. Furthermore, char gasification led to an improvement in the gas yieldcalculated on a dry and ash-free basis (daf)-due to the increased concentration of carbon in the organic fraction of the solid after the pyrolysis step, with an increase in the average CO yield of about 70% -in terms of g/kg solid daf-. The reduction in the fraction of carbon which forms tar is another advantage of char gasification over the direct gasification of sewage sludge, with an average decrease of about 45%. Regarding the influence of the operating conditions, the response variables were mainly controlled by the same factors in both processes.

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Gasification of Biochar from Empty Fruit Bunch in a Fluidized Bed Reactor

Cited by 33 publications

References 21 publications

Poinsettia Growth and Development Response to Container Root Substrate with Biochar

Poinsettia Growth and Development Response to Container Root Substrate with Biochar

An Investigation of the Restitution Coefficient Impact on Simulating Sand-Char Mixing in a Bubbling Fluidized Bed

Air-steam gasification of char derived from sewage sludge pyrolysis. Comparison with the gasification of sewage sludge

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