scholarly journals Soda-AQ pulping of Paulownia wood after hydrolysis treatment

BioResources ◽  
2011 ◽  
Vol 6 (2) ◽  
pp. 971-986
Author(s):  
Juan Carlos García ◽  
Minerva A. M. Zamudio ◽  
Antonio Pérez ◽  
Manuel Javier Feria ◽  
José Lívio Gomide ◽  
...  
Keyword(s):  
Solid Phase ◽  
Cellulose Degradation ◽  
Kappa Number ◽  
Pulp And Paper ◽  
Raw Material ◽  
Similar Process ◽  
Paper Production ◽  
Paulownia Fortunei ◽  
Cellulosic Pulp ◽  
Paulownia Wood

A trihybrid clone of Paulownia fortunei x tormentosa x elongata was used for pulp and paper production using the soda-anthraquinone (AQ) process, comparing the results with those from Paulownia fortunei. An autohydrolysis process had been previously carried out on this raw material. A composite central experimental design and a multiple regression were used for modeling and optimizing the process. A valuable liquid phase could be obtained from the autohydrolysis process of Paulownia, trying to minimize cellulose degradation for pulp and paper production. A compromise to maximize the glucan and minimize the xylan contents in the postautohydrolysis solid phase could be achieved at 187.5ºC and 15 minutes. A suitable cellulosic pulp with kappa number ranging from 12.2 to 69.2 and ISO brightness from 18.2 to 30.6% presented better results than those from other studies. Regarding handsheets physical properties (tensile index 37.3 N·m/g ) and viscosity (848 cm3/g), significant improvements could be obtained when compared with previous results of a similar process using Paulownia fortunei or Paulownia elongata.

scholarly journals Evaluation of Rhododendron Luteum and Rhododendron Ponticum in Pulp and Paper Production

2020 ◽  
Vol 71 (4) ◽  
pp. 365-370
Author(s):  
Emre Birinci ◽  
Ahmet Tutuş ◽  
Mustafa Çiçekler
Keyword(s):  
Physical Properties ◽  
Kappa Number ◽  
Pulp And Paper ◽  
Raw Material ◽  
Paper Properties ◽  
Paper Production ◽  
Rhododendron Ponticum ◽  
Breaking Length ◽  
Pulp Properties ◽  
Cooking Conditions

In this study, Rhododendron luteum and Rhododendron ponticum were evaluated as raw material for pulp and paper production. 12 different sodium borohydride (NaBH4) added cooking trials were performed for each sample and kraft method was used for pulp production. Pulp properties, such as yield, kappa number and viscosity, and physical properties, such as breaking length and burst index, were determined for each trial. Besides, the effects of active alkali and NaBH4 on the pulp and paper properties were also examined. Optimum cooking conditions were obtained by using 18 % active alkali for NaBH4-free cooking experiments and 0.5 % NaBH4 and 18 % active alkali for NaBH4-added cooking experiments. In NaBH4-added pulping condition, the screened yield, kappa number and viscosity of R. luteum were found to be 43.4 %, 40.1 and 949 cm3/g1, respectively. The respective values for R. ponticum were 41.9 %, 44.5 and 885 cm3/g1. The screened yields of R. luteum and R. ponticum increased by about 2.8 % and 5.3 %, respectively, with 5 % addition of NaBH4 compared to NaBH4-free cooking experiments. Furthermore, with the addition of NaBH4, the kappa numbers decreased while the viscosity increased. The physical properties of the produced papers were also improved by using NaBH4 in cooking liquor. According to the obtained results, it was found that R. luteum and R. ponticum species can be evaluated for pulp and paper production.

scholarly journals Pulp and paper production from oil palm empty fruit bunches: A current direction in Malaysia

2020 ◽  
Vol 1 (2) ◽  
pp. 1-9
Keyword(s):  
Oil Palm ◽  
Raw Materials ◽  
Paper Industry ◽  
Three Dimensional ◽  
Natural Fibre ◽  
Pulp And Paper ◽  
Raw Material ◽  
Cellulose Fibres ◽  
Paper Production ◽  
Paper Making

The pulp and paper industry is advanced rapidly since there are many types of raw materials containing cellulose fibres that could be used to produce different kinds of paper by different methods in the mills. In Malaysia, one of the abundant non-wood materials for pulp and paper production is empty fruit bunch (EFB) from the oil palm. The EFB is the main fibrous residue and natural fibre which has promising potential as an alternative to replace woody materials. This study provides insight into the use of EFB as an alternative non-wood fibre resource in pulp and paper making. The potential of oil palm EFB transformed into valuable fibre material was elaborated. In this review, detailed information on the properties of EFB for pulp and paper making process to identify the chemical composition and fibre morphology were discussed. Recent advanced applications including nanocellulose from EFB, polymeric hydrogel, and antimicrobial papers were discussed to demonstrate high commercialization for pulp and paper technology. The three-dimensional (3D) printing technique has been employed due to the high complexity of paper products. The future trends and challenges regarding the use of EFB in pulp and paper making were also reviewed. This study demonstrated that the EFB has met the demand of the market chains as a potential raw material in paper making and manufacturing.

scholarly journals Pinus halepensis and Eucalyptus camaldulensis grown in Egypt: A comparison between stem and branch properties for pulp and paper making

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 7598-7614
Author(s):  
Khaled T. S. Hassan ◽  
El-Sayed A. E. Kandeel ◽  
Ibrahim E. A. Kherallah ◽  
Hosny A. Abou-Gazia ◽  
Fatma M. M. Hassan
Keyword(s):  
Fiber Length ◽  
Pinus Halepensis ◽  
Chemical Constituents ◽  
Basic Density ◽  
Eucalyptus Camaldulensis ◽  
Pulp And Paper ◽  
Raw Material ◽  
Paper Production ◽  
Fiber Wall ◽  
Morphological Indices

The utilization of branchwood as lignocellulosic raw material source for paper production may have the potential of solving the problem of the availability of raw material in the pulp and paper industry. This study therefore compared the chemical composition and fiber morphological indices (according to Franklin’s method) of stemwood and branchwood in Eucalyptus camaldulensis and Pinus halepensis trees grown in Egypt. The statistical analysis showed a significant effect of species, wood type (stem and branchwood), and their interaction on the measured chemical constituents and fiber morphological indices at 0.05 significance level. In both genera, the stemwood exhibited a higher percentage of cellulose and hemicellulose and was lower in lignin, total extractives, and ash than those measured in branchwood. Also in both genera, the stemwood was higher in fiber length, Runkel ratio, rigidity coefficient, Muhlsteph ratio, and Luce’s shape factor, and lower in basic density and flexibility coefficient than those in branchwood. Based on the chemical analysis and the fiber morphological indices, the stemwood and branchwood of both species were suitable for paper production with various qualities. Moreover, good correlations were found in both stem and branchwood between the basic density and the fiber wall thickness and fiber lumen diameter. ln contrast, there was an independent association between the stemwood basic density and the fiber length, and this relationship in branchwood was positive for both genera.

scholarly journals Nitrate-Alkaline Pulp from Non-Wood Plants

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3673
Author(s):  
Kateřina Hájková ◽  
Jiří Bouček ◽  
Petr Procházka ◽  
Petr Kalous ◽  
Dominik Budský
Keyword(s):  
Czech Republic ◽  
Chemical Composition ◽  
Camelina Sativa ◽  
Agricultural Residues ◽  
Kappa Number ◽  
Pulp And Paper ◽  
The Czech Republic ◽  
Paper Production ◽  
Breaking Length ◽  
Black Mustard

Because there is a lack of wood resources in many countries, this work focused on pulp and paper production from the waste and agricultural residues of non-wood plants. The work aimed to pulp the nitrate-alkaline of black mustard (Brassica Nigra L.) and camelina (Camelina Sativa L.). The black mustard and the camelina were selected due to the expanding planted areas of these crops in the Czech Republic. To characterize the chemical composition of black mustard and camelina, cellulose, lignin, ash, and extractives were determined. Raw alpha-cellulose, beta-cellulose, and gamma-cellulose were also measured. The results showed that the content of lignin in non-wood plants is lower than that in softwoods. The cooked pulp was characterized by the delignification degree–Kappa number. Additionally, handsheet papers were made for selected samples of pulp. The handsheet papers were characterized by tensile index, breaking length, and smoothness and compared with commonly available papers.

scholarly journals WOOD QUALITY OF Pinus patula Schltdl & Cham FOR THE PULP PRODUCTION

2019 ◽  
Vol 43 (2) ◽  
Author(s):  
Karina Soares Modes ◽  
Raquel Lúcia Ludwig ◽  
Magnos Alan Vivian ◽  
Joni Stolberg
Keyword(s):  
Chemical Composition ◽  
Wood Quality ◽  
Basic Density ◽  
Morphological Characteristics ◽  
Pulp And Paper ◽  
Raw Material ◽  
Pinus Patula ◽  
Traditional Use ◽  
Paper Production

ABSTRACT The softwood pulp industry is based on the supply of Pinus taeda and P. elliottii woods, and competes for this raw material with other timber sectors. The study aimed to evaluate the wood quality of Pinus patula for pulp and paper production. Trees aged 14 years were obtained from a plantation located in Ponte Alta do Norte, State of Santa Catarina/Brazil. Discs were collected along the commercial height for determining the weighted basic density and its longitudinal variation in the trees, and the chemical composition. For the anatomical characterization, a disc was extracted from the base of each tree to determine the radial variation of tracheids morphological characteristics, and their quality indexes for the production of kraft pulp. The weighted basic density (365 kg.m-3) of the wood was low when compared with other species of the same genus. Regarding the tracheids morphology, a mean length of 2.37 mm; wall thickness of 5.49 µm; width of 40.32 µm and a lumen diameter of 29.09 µm were observed. The chemical composition of the species showed low contents of lignin (25.06%) and ashes (0.27%), compatible content of holocellulose (70.76%), and high content of extractives (6.24%) compared with conifers of traditional use. In general, P. patula species shows characteristics compatible with those traditionally used for the pulp and paper production, and it should be considered in more advanced studies with this species in this segment.

scholarly journals Anatomical and chemical characterization of Alstonia boonei for pulp and paper production

Les/Wood ◽  
2021 ◽  
Vol 70 (2) ◽  
Author(s):  
Kojo Agyapong Afrifah ◽  
Enoch Adjei-Mensah
Keyword(s):  
Slenderness Ratio ◽  
Fibre Diameter ◽  
Fibre Length ◽  
Basic Density ◽  
Pulp And Paper ◽  
Raw Material ◽  
Pulp Yield ◽  
Thin Wall ◽  
Paper Production ◽  
Fibre Characteristics

Alstonia boonei, an abundant lesser utilized species within the West African Subregion, was evaluated as an alternative raw material for pulp and paper production. The basic density (BD), fibre characteristics [fibre length (FL), fibre diameter (FD), lumen diameter (LD) and wall thickness (WT)], derived anatomical indices [Flexibility Ratio (FR), Slenderness Ratio (SR), Rigidity Coefficient (RC), Luce’s Shape Factor (LSF), Solids Factor (SF) and Runkel Ratio (RR)] and chemical composition (lignin, holocellulose, 1% NaOH solubility and ash contents) of A. boonei were studied to evaluate variation along the trunk (base, middle and top portions) and ascertain its suitability for pulp and paper production. Significant variations were observed in the density and fibre characteristics along the trunk of the tree. Although the FD was large, the observed adequate FL, thin-wall and large LD implied easy beating of fibres and manufacture of dense, smooth and strong papers. The favourable SF, RR, FR, RC, and LSF values obtained for the fibres would produce papers with suitable burst and tearing strengths and folding endurance. Chemically the lower lignin (< 30%), ash and 1% NaOH solubility and the high holocellulose contents of A. boonei, will generate a higher pulp yield. A. boonei although a low-density species, will be desirable for pulp and paper production.

scholarly journals Agricultural Residues as an Alternative Source of Fibre for the Production of Paper in Kenya-A Review

2021 ◽  
pp. 22-37
Author(s):  
John Odhiambo Otieno ◽  
Treezer Nelly Okumu ◽  
Morelly Adalla ◽  
Fredrick Ogutu ◽  
Boniface Oure
Keyword(s):  
Raw Materials ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Agricultural Residues ◽  
Pulp And Paper ◽  
Raw Material ◽  
Paper Production ◽  
Wood Fibres ◽  
Paper And Pulp ◽  
Pulp Production

The pulp and paper industry is primarily dependent on fibrous wood for pulp and paper production. However, this over-dependence on fibrous wood poses serious environmental challenges such as the diminishing of the fibrous wood stocks, deforestation, emission of greenhouse gases, and global warming. Therefore, to mitigate these environmental challenges associated with its utilization for paper and pulp production, other sustainable raw material sources can also be considered for the production of paper and pulp. There are enormous benefits associated with the utilization of non-wood fibres as an alternative and sustainable raw materials source for the production of paper and pulp. These benefits have in the recent past prompted millers in China, India, Brazil, and the USA to consider the utilization of non-wood fibres in paper and pulp production. In Kenya, the pulp and paper industry is very much dependent on fibrous wood for production and the industry is yet to fully embrace the utilization of nonwood fibres for paper and pulp production. Further, the dependence on fibrous wood has contributed significantly to the decline of paper pulp and paper production, deforestation, and rise in paper importations due to insufficient raw material supplies. The importation of paper and pulp products has further led to the collapse of the paper industry in Kenya. The sector stands a chance of revival and vibrancy through the utilization of the abundant agricultural residues and feedstocks lying in the agricultural fields across the country. Similar experiences elsewhere have proved that the abundance of agricultural waste can be utilized for the production of paper and pulp due to their excellent fibre content for specialty papers, and easy pulpability. The agricultural residues are therefore considered a quintessential alternative and sustainable source of raw materials for the pulp and paper industry. Moreover, their utilization will mitigate environmental impacts such as deforestation, climate change, and pollution .

scholarly journals Fulfilling Eucalyptus raw materials for pulp and paper production plants

2021 ◽  
Vol 912 (1) ◽  
pp. 012008
Author(s):  
N Sembiring ◽  
H L Napitupulu ◽  
M T Sembiring ◽  
A Ishak ◽  
H A Gunawan
Keyword(s):  
Supply Chain ◽  
Paper Industry ◽  
Market Price ◽  
Pulp And Paper ◽  
Cold Climate ◽  
Raw Material ◽  
Paper Production ◽  
Eucalyptus Plantation ◽  
Stem Size ◽  
Eucalyptus Wood

Abstract Eucalyptus is one of the major species used for pulp and paper industry. As industries develop, the need for Eucalyptus supply increases. However, there are challenges plantation companies must specifically determining eucalyptus market price potential risks in eucalyptus plantation and how eucalyptus plantation impacts the surrounding environment.. Stakeholders on eucalyptus supply chain have risks which have to be mitigated. The eucalyptus seedling and developer and the supplier hold crucial role in providing good quality eucalyptus raw material for pulp and paper production plants. This research is conducted to explore on ways to mitigate each stakeholders risk, challenges plantation companies face in fulfilling eucalyptus raw material for pulp and paper production plants. There are four stakeholders in eucalyptus supply chain: eucalyptus seedling developer and seller, supplier, distribution centre and pulp and paper production plants. Some of the major risk stakeholders are facing in eucalyptus supply chain are: early cut of eucalyptus trees, farmers’ lack of understanding on growing eucalyptus properly, small stem size, fluctuating eucalyptus wood price and low stock quantity. Some of the minor risk stakeholders are facing: earthquake, over fertilization, overwatering, cold climate, and plant setting. There are four methods used to determine eucalyptus pricing: cost-based pricing, customer-based pricing, competition-based pricing, and statutory pricing. Eucalyptus consume high amount of water which can cause dry areas around eucalyptus plantation area and low groundwater reservoir.

Sign in / Sign up

Export Citation Format

Share Document