Neural fuzzy model applied to autohydrolysis of Paulownia trihybrid

Zamudio, Minerva A.M.; Pérez, A.; López, Fátima; García, Juan Carlos Figueroa; Feria, M.J.; Alfaro, A.

doi:10.1016/j.jtice.2010.07.008

Cited by 19 publications

(10 citation statements)

References 26 publications

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“…(40-41 t/ha) [24], which is another fast-growing species with great potential as a bioenergy crop. The high production yield also favors the recovery and control of soil, which stabilizes the soil erosion and effectively absorbs carbon dioxide [25]. The suggested use of Paulownia wood is for house construction, furniture making, farm implements, handcraft, veneer, plywood, and paper pulp [26].…”

Section: Scheme 1 Biorefinery Based On Hwementioning

confidence: 99%

Impact of Hot-Water Extraction on Acetone-Water Oxygen Delignification of Paulownia Spp. and Lignin Recovery

Gong

Bujanovic

2014

Energies

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A hardwood-based biorefinery process starting with hot-water extraction (HWE) is recommended in order to remove most of the hemicelluloses/xylans before further processing. HWE may be followed by delignification in acetone/water in the presence of oxygen (AWO) for the production of cellulose and lignin. In this study, the HWE-AWO sequence was evaluated for its effectiveness at removing lignin from the fast-growing species Paulownia tomentosa (PT) and Paulownia elongata (PE), in comparison with the reference species, sugar maple (Acer saccharum, SM). HWE might lead to a remarkable increase in lignin accessibility, and as a result, a greater AWO delignification degree was observed for extracted PT, PE, and SM than for unextracted ones. Organosolv lignin was recovered from the spent liquor of AWO delignification of PT with/without prior HWE and characterized to evaluate the benefits of HWE on the lignin structure and purity. The lignin recovered from the spent liquor of HWE-AWO sequence is of higher purity and lighter color than that recovered from the AWO spent liquor. These properties along with low sulfur content are desirable for lignin high-value applications.

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Section: Scheme 1 Biorefinery Based On Hwementioning

confidence: 99%

Impact of Hot-Water Extraction on Acetone-Water Oxygen Delignification of Paulownia Spp. and Lignin Recovery

Gong

Bujanovic

2014

Energies

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“…O modelo neuro fuzzy já foi aplicado na análise da auto-hidrólise da Paulownia spp. para fabricação de pasta de celulose (Zamudio et al, 2011), como metodologia para descrever o grau de severidade da ferrugem (Phakopsora pachyrhizi) da soja (Alves et al, 2011) e na predição da absorção de água pelo solo, comparando-o com o modelo estatístico de regressão múltipla (Yilmaz & Kaynar, 2011).…”

Section: Introductionunclassified

Estimativa da produtividade de trigo em função da adubação nitrogenada utilizando modelagem neuro fuzzy

Silva¹,

Silva²,

Filho

et al. 2014

Rev. bras. eng. agríc. ambient.

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R E S U M OAtualmente, novas técnicas de processamento de dados, tais como redes neurais, lógica nebulosa (fuzzy) e sistemas híbridos, são utilizadas para elaborar modelos de predição em sistemas complexos e estimar parâmetros desejados. Neste artigo investigou-se a habilidade de se desenvolver um modelo de inferência adaptativo neuro fuzzy para estimação da produtividade de trigo utilizando-se uma base de dados da combinação dos seguintes tratamentos: cinco doses de N (0, 50, 100, 150 e 200 kg ha -1 ); três fontes (Entec, sulfato de amônio e ureia); duas épocas de aplicação de N (na semeadura ou em cobertura) e dois cultivares de trigo (E21 e IAC 370), avaliados durante dois anos, em Selvíria, MS. Através dos dados de entrada e saída o sistema de inferência neuro fuzzy adaptativo apreende e posteriormente pode estimar um novo valor de produção de trigo com base em doses diferenciadas de N. O erro de predição da produtividade de trigo em função das cinco doses de N, obtido com o sistema neuro fuzzy, foi menor que o valor obtido utilizando-se uma aproximação quadrática. Os resultados mostraram que o sistema neuro fuzzy é viável para desenvolver um modelo de predição visando estimar a produtividade de trigo em função da dose de N.Estimate of wheat grain yield as function of nitrogen fertilization using neuro fuzzy modeling A B S T R A C TCurrently new techniques for data processing, such as neural networks, fuzzy logic and hybrid systems are used to develop predictive models of complex systems and to estimate the desired parameters. In this article the use of an adaptive neuro fuzzy inference system was investigated to estimate the productivity of wheat, using a database of combination of the following treatments: five N doses (0, 50, 100, 150 and 200 kg ha -1 ), three sources (Entec, ammonium sulfate and urea), two application times of N (at sowing or at side-dressing) and two wheat cultivars (IAC 370 and E21), that were evaluated during two years in Selvíria, Mato Grosso do Sul, Brazil. Through the input and output data, the system of adaptive neuro fuzzy inference learns, and then can estimate a new value of wheat yield with different N doses. The productivity prediciton error of wheat in function of five N doses, using a neuro fuzzy system, was smaller than that one obtained with a quadratic approximation. The results show that the neuro fuzzy system is a viable prediction model for estimating the wheat yield in function of N doses. Palavras-chave: IntroduçãoAs condições de solo, clima e topografia, favoráveis ao cultivo de trigo, tanto de sequeiro como irrigado em épocas e altitudes definidas pela pesquisa, fazem do Brasil Central uma região de enorme potencial para a expansão desta cultura com a perspectiva de propiciar, a médio prazo, a autossuficiência na produção nacional. Outrossim, a inserção do trigo no Cerrado contribui para diversificar os sistemas produtivos regionais agregando elementos para a sustentabilidade de produção nesse ecossistema brasileiro (RCCBPT, 2005).A utilização de cultivares de tr...

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“…Soda anthraquinone pulping is also used to produce high yield hardwood pulps that are employed to make packaging papers and boards. This process has recently been investigated in laboratory scale for a trihybrid clone of Paulownia fortunei x tomentosa x elongate, [8,9] where the Paulownia genus has attracted considerable attention as dedicated energy crop. Because it has modest water requirements, Paulownia has aroused interest as an industrial raw material despite its difficult growth in marginal areas [10].…”

Section: Introductionmentioning

confidence: 99%

“…xylooligomers under a hydrolytic process, as well as provide a low degraded lignocellulosic residue to the pulping process, which is justified by some Paulownia characteristics, such as its growth and physicochemical properties [8,16].…”

Section: Introductionmentioning

confidence: 99%

Paulownia as raw material for solid biofuel and cellulose pulp

López¹,

Pérez²,

Zamudio

et al. 2012

Biomass and Bioenergy

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The influence of the process conditions of pulping of a trihybrid clone Paulownia on pulp properties for the soda anthraquinone process has been investigated in a semi-pilot scale. A composite central experimental design and a multiple regression were used to find the relationship between independent process variables and pulp properties. The ash content (0.89%) is lower and cellulose content (44.0%) is higher than those found for other species of Pauwlonia and other energetic crops. The elemental composition has a low content in S and N (0.21%) in comparation with poplar or willow. With a gross heating value of 20335 J/g, Paulownia is a suitable feedstock for use as solid biofuel. This is somewhat higher than those for hardwood, slightly higher than those for Pinus pinaster and softwood, and much higher than those for residues of food plants and agricultural crops. This supports the use of the genus Paulownia as an energy crop. The soda-anthraquinone pulping could be and adequate process for Paulownia. Fibre length (0.97 mm) is similar to hardwoods and suitable physical characteristics of paper sheets (tensile index) and acceptable chemical characteristics and yield pulping could be obtained by operating at lowintermediate temperature (163-171ºC) and alkali concentration (20%) and high or medium values for operation time (120-150 min). The pulp obtained at these conditions has suitable chemical (pulp) and physical (paper sheets) characteristics: yield (47.0%), ethanol-benzene extractives (2.22%), holocellulose contents (96.0%), α-cellulose contents (75.8%), lignin contents (8.28%), Shopper Riegler degree (23.2 ºSR), and tensile index (36.0) kN m/kg. HighlightsThe influences of the process conditions of pulping of a trihybrid clone Paulownia on pulp properties for the soda anthraquinone process have been investigated in a semi-pilot scale.The soda-anthraquinone pulping could be and adequate process for trihybrid clone Paulownia is similar to hardwoods and suitable physical characteristics of paper sheets.Trihybrid clone Paulownia is a suitable feedstock for use as solid biofuel.

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Neural fuzzy model applied to autohydrolysis of Paulownia trihybrid

Cited by 19 publications

References 26 publications

Impact of Hot-Water Extraction on Acetone-Water Oxygen Delignification of Paulownia Spp. and Lignin Recovery

Impact of Hot-Water Extraction on Acetone-Water Oxygen Delignification of Paulownia Spp. and Lignin Recovery

Estimativa da produtividade de trigo em função da adubação nitrogenada utilizando modelagem neuro fuzzy

Paulownia as raw material for solid biofuel and cellulose pulp

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