Developing a free-fall reactor for rice straw fast pyrolysis to produce bio-products

Shoaib, Abeer M.; El-Adly, R. A.; Hassanean, Mohamed; Youssry, A.; Bhran, Ahmed A.

doi:10.1016/j.ejpe.2018.08.002

Cited by 28 publications

(14 citation statements)

References 19 publications

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“…The low heating value (LHV) of the pyrolysis gases typically ranges between 5.5-7.0 MJ m −3 if not diluted with any inert gases. 42 The simplest application for these gases is combustion to generate energy, for example, to increase the steam/ electricity output.…”

Section: Pyrolysis Product Composition and Propertiesmentioning

confidence: 99%

Pyrolytic lignin: a promising biorefinery feedstock for the production of fuels and valuable chemicals

et al. 2022

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Section: Pyrolysis Product Composition and Propertiesmentioning

confidence: 99%

Pyrolytic lignin: a promising biorefinery feedstock for the production of fuels and valuable chemicals

et al. 2022

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“…Bio‐oil product distribution from different feedstocks: (A) oak, (B) beechwood, (C) rice straw, and (D) cassava stalk. Green graph bars represent experimental results from Ellens and Brown, Guizani et al, Shoaib et al, and Pattiya et al, [ 39,54–56 ] respectively. Black graph bars are simulation results from the present work.…”

Section: Resultsmentioning

confidence: 99%

“…Overall, the present study is in fair agreement with the pyrolysis yields of experimental results reported in literature. [ 39,54–56 ]…”

Section: Resultsmentioning

confidence: 99%

“…The characteristic time for the overall reaction is intended as the inverse of the reaction rate (1/r), whereas the characteristic time for diffusion is assumed as the square of characteristic length divided by diffusion coefficient (L 2 /D), in accordance with the literature. [51][52][53] Furthermore, the pyrolysis model was tested and cross-checked with experimental data reported in the literature for different feedstocks [39,[54][55][56] over a range of reaction conditions. Additional information on the specific steps composing the implemented procedure is provided in the following sections.…”

Section: Methodsmentioning

confidence: 99%

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Performance assessment of drop tube reactor for biomass fast pyrolysis using process simulator

Wako,

Pio,

Lofti

et al. 2023

Can J Chem Eng

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Biomass pyrolysis process from a drop tube reactor was modelled in a plug flow reactor using Aspen Plus process simulation software. A kinetic mechanism for pyrolysis was developed considering the recent improvements and updated kinetic schemes to account for different content of cellulose, hemicellulose, and lignin. In this regard, oak, beechwood, rice straw, and cassava stalk biomasses were analyzed. The main phenomena governing the pyrolysis process are identified in terms of the characteristic times. Pyrolysis process was found to be reaction rate controlled. Effects of pyrolysis temperature on bio‐oil, gases, and char yields were evaluated. At optimum pyrolysis conditions (i.e., 500°C), a bio‐oil yield of 67.3, 64, 43, and 52 wt.% were obtained from oak, beechwood, rice straw, and cassava stalk, respectively. Oak and beechwood were found to give high yields of bio‐oil, while rice straw produced high gas and char yields compared to other biomasses. Although temperature is the main factor that plays a key role in the distribution of pyrolysis products, the composition of cellulose, hemicellulose, and lignin in the feedstock also determines the yield behaviour and composition of products. With the rise in pyrolysis temperature, further decomposition of intermediate components was initiated favouring the formation of lighter fractions. Comparably, species belonging to the aldehyde chemical family had the highest share of bio‐oil components in all the investigated feedstocks. Overall, the present study shows a good agreement with the experimental study reported in the literature, confirming its validity as a predictive tool for the biomass pyrolysis process.

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“…Polycyclic aromatic hydrocarbons (PAHs), dioxins, furans are some carcinogenic compounds that are also released during the burning of PS [ 198 ]. Paddy straw contains about 0.78, 0.24, 1.15%, and 14% of the nitrogen (N), phosphorus (P), potassium (K), and silica (Si), respectively [ 199 , 200 ]. By considering the nutrient dynamics, PS burning depletes the soil vital nutrients (particularly N) and reduces soil organic matter [ 201 ].…”

Section: Untransformed Agro-industrial Residues: Moving Forwardsmentioning

confidence: 99%

Agro-industrial-residues as potting media: physicochemical and biological characters and their influence on plant growth

Agarwal

Saha

Hariprasad

2021

Biomass Conv. Bioref.

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Graphical abstract Nursery cultivation is recognized globally as an intensive production system to support quality seedlings as well as to manage resources efficiently. Apart from other factors, potting media (PM) play a crucial role in determining the success of nursery cultivation. Worldwide, peat is the most commonly used substrate in PM because of its favorable physicochemical properties. However, due to ascending environmental and ecological concerns regarding the use of peat, a variety of new substrates have been used/tested by researchers/practitioners/growers as PM. Bark, coir pith, wood fiber, compost derived from various agro-residues, and vermicompost either alone or in combination are some of the commonly explored substrates and found to have the potential to replace peat to a greater extent. In lieu of availability, abundance, low cost, and no/low processing requirement, the use of agro-industrial residue (AIR) in the PM is the current trend. However, challenges associated with their adoption cannot be ignored. The present review is focused on providing collective information, scientific knowledge and detailed analysis of various AIR used in PM. The critical evidence-based review would help in developing a consistent approach for the identification, selection and characterization of a new renewable substrate. In addition, it would help in developing a rationale understanding of the practical and economic realities involved in the adoption of the same in PM. Supplementary Information The online version contains supplementary material available at 10.1007/s13399-021-01998-6.

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Developing a free-fall reactor for rice straw fast pyrolysis to produce bio-products

Cited by 28 publications

References 19 publications

Pyrolytic lignin: a promising biorefinery feedstock for the production of fuels and valuable chemicals

Pyrolytic lignin: a promising biorefinery feedstock for the production of fuels and valuable chemicals

Performance assessment of drop tube reactor for biomass fast pyrolysis using process simulator

Agro-industrial-residues as potting media: physicochemical and biological characters and their influence on plant growth

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