scholarly journals Energy efficiency challenges in pulp and paper manufacturing: A tutorial review

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8567-8639
Author(s):  
Martin A. Hubbe
Keyword(s):  
Best Practices ◽  
Energy Content ◽  
Paper Industry ◽  
Pulp And Paper ◽  
Wood Material ◽  
Additional Energy ◽  
Heating Value ◽  
Paper Manufacturing ◽  
Unit Operations ◽  
Chemical Pulping

The pulp and paper industry is highly energy-intensive. In mills that use chemical pulping, roughly half of the higher heating value of the cellulosic material used to manufacture the product typically is incinerated to generate steam and electricity that is needed to run the processes. Additional energy, much of it non-renewable, needs to be purchased. This review considers publications describing steps that pulp and paper facilities can take to operate more efficiently. Savings can be achieved, for instance, by minimizing unnecessary losses in exergy, which can be defined as the energy content relative to a standard ambient condition. Throughout the long series of unit operations comprising the conversion of wood material to sheets of paper, there are large opportunities to more closely approach a hypothetical ideal performance by following established best-practices.

scholarly journals Energy efficiency challenges in pulp and paper manufacturing: A tutorial review

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 8567-8639
Author(s):  
Martin A. Hubbe
Keyword(s):  
Best Practices ◽  
Energy Content ◽  
Paper Industry ◽  
Pulp And Paper ◽  
Wood Material ◽  
Additional Energy ◽  
Heating Value ◽  
Paper Manufacturing ◽  
Unit Operations ◽  
Chemical Pulping

The pulp and paper industry is highly energy-intensive. In mills that use chemical pulping, roughly half of the higher heating value of the cellulosic material used to manufacture the product typically is incinerated to generate steam and electricity that is needed to run the processes. Additional energy, much of it non-renewable, needs to be purchased. This review considers publications describing steps that pulp and paper facilities can take to operate more efficiently. Savings can be achieved, for instance, by minimizing unnecessary losses in exergy, which can be defined as the energy content relative to a standard ambient condition. Throughout the long series of unit operations comprising the conversion of wood material to sheets of paper, there are large opportunities to more closely approach a hypothetical ideal performance by following established best-practices.

scholarly journals Acetone-butanol-ethanol fermentation from different pulp and paper manufacturing process side-streams

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9265-9290
Author(s):  
Sandra Sandar ◽  
Ming Yang ◽  
Ossi Turunen ◽  
Jouko Vepsäläinen ◽  
Ari Pappinen ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Manufacturing Process ◽  
Paper Industry ◽  
Pulp And Paper ◽  
Dilute Acid Pretreatment ◽  
Acid Pretreatment ◽  
Diverse Range ◽  
Paper Manufacturing ◽  
Multi Stage ◽  
Acetone Butanol Ethanol

The pulp and paper industry produces a diverse range of side-streams from multi-stage processes, but these remain underutilized despite their high potential for use as biofuels. This study investigated acetone-butanol-ethanol (ABE) fermentation by Clostridium acetobutylicum DSM 1731 from the side-streams of three different stages of the pulp and paper manufacturing process (PI, PII, and PIII). Biomass specimens with and without water washing were pretreated with 0.2% H2SO4 at 180 °C for 10 min, followed by enzymatic hydrolysis, to obtain fermentable sugars. The results showed that the produced ABE solvent concentrations were 12.8 g/L, 5.2 g/L, and 6.3 g/L from PI, PII, and PIII, respectively. The butanol yields of PI, PII, and PIII were 0.25, 0.18, and 0.19 g/g sugars, respectively. Among the tested side-streams, PI was shown to have potential as a feedstock for butanol production without prewashing prior to dilute acid pretreatment, enzymatic hydrolysis, and microbial fermentation.

scholarly journals Industrial flowmeters in the pulp and paper industry

2019 ◽  
Author(s):  
М.С. Лурье ◽  
О.М. Лурье ◽  
А.С. Фролов
Keyword(s):  
Flow Measurement ◽  
Paper Industry ◽  
Vortex Formation ◽  
Pulp And Paper ◽  
The Body ◽  
Advantages And Disadvantages ◽  
Paper Manufacturing ◽  
Useful Signal ◽  
The Stability ◽  
Mathematical Relationships

Работа посвящена обзору расходоизмерительного оборудования, применяемого в технологических операциях целлюлознобумажного производства (ЦБП). Представлены основные требования к расходомерам, использующимся в регулировании технологических процессов ЦБП. Рассмотрены конструктивные особенности и принцип действия различных типов расходомеров, а также представлены их достоинства и недостатки. Представлена технологическая схема производства газетной бумаги и бумаги для гофрирования с указанием расположения расходомеров, фиксирующих объем волокнистых масс с заданной концентрацией и степенью помола. Рассмотрены скорости волокнистых суспензий, циркулирующих по внутрицеховым трубопроводам в зависимости от концентрации и диаметра трубопровода. Проведенный анализ данных с учетом основных требований, предъявляемых к расходомерам, показал, что весьма перспективным типом расходомеров являются вихревые приборы. Рассмотрены принцип действиях и основные типы таких приборов: с прецессией вихря и телом обтекания. Представлены математические соотношения процесса измерения расхода вихревыми приборами. На рисунках представлена картина обтекания цилиндра потоком жидкости и метод повышения устойчивости вихреобразования с помощью канала обратной связи. Показан метод преобразования расхода в полезный сигнал в вихревых расходомерах с помощью специальных устройств, которые называют приемникомпреобразователем вихревых колебаний (ППВК), которые в свою очередь разделяются на группы. В качестве примера рассмотрен один из ППВК, называемый контактнокондуктометрическим. Рассмотрена конструкция и принцип действия перспективных типов среди вихревых расходомеров, называемых погружными. Сделаны выводы о перспективности применения погружных вихревых расходомеров в технологических процессах ЦБП. The work is devoted to the review of the flow measurement equipment used in pulp and paper production (pulp and paper) operations (pulp and paper). The main requirements for flowmeters used in the regulation of technological processes of pulp and paper are presented. The design features and operating principle of various types of flowmeters are considered, and their advantages and disadvantages are also presented. The technological scheme of production of newsprint and corrugating paper with the indication of the arrangement of flow meters fixing the volume of fibrous masses with a given concentration and degree of grinding is presented. The speeds of fibrous suspensions circulating through internal pipe lines are considered depending on the concentration and diameter of the pipeline. The analysis of the data, taking into account the basic requirements for flowmeters, has shown that vortex devices are a very promising type of flowmeters. The principle of actions and the main types of such devices are considered: with the precession of the vortex and the body of flow. The mathematical relationships of the process of flow measurement by vortex devices are presented. Figures show the flow pattern of a cylinder by a liquid flow and the method of increasing the stability of a vortex formation by means of a feedback channel. The method is shown to convert flow into a useful signal in vortex flowmeters by means of special devices which are called receiverpreobrazatorom vortex oscillations (CPVC), which in turn are divided into groups. As an example, one of the TSTCs called contactconductometric is considered. The design and operation principle of promising types among vortex flowmeters called submersible flowmeters is considered. Conclusions are drawn about the prospects of using submerged vortex flowmeters in pulp and paper manufacturing processes.

Corn Stalk Fiber Material by Chemical Pulping Process for Pulp and Paper Industry

2016 ◽  
Vol 1133 ◽  
pp. 608-611 ◽  
Author(s):  
Zawawi Daud ◽  
Mohd Zainuri Mohd Hatta ◽  
Ab Aziz Abdul Latiff ◽  
Halizah Awang
Keyword(s):  
Chemical Composition ◽  
Lignin Content ◽  
Paper Industry ◽  
Green Technology ◽  
Pulp And Paper ◽  
Corn Stalk ◽  
Fiber Morphology ◽  
Electron Microscopic ◽  
Paper Making ◽  
Chemical Pulping

The agriculture waste material can give benefit to many production industries. The studied crop is corn (Zea Mays) stalk. The objective of this work was to analysis the chemical composition; to study chemical pulping and papermaking properties of corn stalk and; to investigate the fiber morphology of properties of those crops. Firstly, the chemical composition of corn stalk were determined and compared with other non-woods. After that, chemical corn stalk was conducted in this analysis followed the physical and mechanical properties. The result showed that, corn stalk have cellulose (39.0%) and lignin content is the lowest (7.3%) content rather than other composition. In chemical pulping, reached high pulp yields had been produced and the strength properties: tear index, tensile index, burst and fold verified that they were of an acceptable quality for papermaking. This crop morphology was observed by Scanning Electron Microscopic (SEM), which showed a condensed composition of fiber structure. This study can developed a friendly product and promote the green technology, suitable to be used as an alternative pulp in paper making industry.Keywords: Fiber, Corn stalk, Composition, Green technology, Pulp and paper making.

scholarly journals Process and Environmental Benefit of Recycling of Waste Papers

2020 ◽  
Vol 8 (2S12) ◽  
pp. 104-106
Keyword(s):  
Pulp And Paper ◽  
Environmental Resources ◽  
Environmental Benefit ◽  
Wood Material ◽  
Paper Production ◽  
Handmade Paper ◽  
Paper Manufacturing ◽  
Fundamental Part ◽  
The World ◽  
Pulp Wood

Paper is a fundamental part of most aspects of society; worldwide a total of approximately three hundred million tons of paper are produced each day and approximately 90% of this paper is produced from mature pulp wood. In addition, the demand of paper is expected to increase. Today the finest of paper are produced all over the world. But one dismaying fact is that millions of trees are fell in a day to make paper. Increase demands of paper production and limited wood resources have directed researchers to look for appropriate additional resources of non-wood material (waste papers) for pulp and paper manufacturing. Setting up of handmade paper unit has the capability of recycling waste paper and cotton rags into fine quality handmade paper. Not only does this initiative conserve environmental resources but also helps in providing employment to pupil from the unskilled and marginalized strata of society.

scholarly journals The Potential Use of Fly Ash from the Pulp and Paper Industry as Thermochemical Energy and CO2 Storage Material

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3348
Author(s):  
Saman Setoodeh Jahromy ◽  
Mudassar Azam ◽  
Christian Jordan ◽  
Michael Harasek ◽  
Franz Winter
Keyword(s):  
Fly Ash ◽  
Energy Content ◽  
Co2 Storage ◽  
Paper Industry ◽  
Pulp And Paper ◽  
Cycling Stability ◽  
Leaching Tests ◽  
Free Lime ◽  
Limit Values ◽  
X Ray

As a part of our research in the field of thermochemical energy storage, this study aims to investigate the potential of three fly ash samples derived from the fluidized bed reactors of three different pulp and paper plants in Austria for their use as thermochemical energy (TCES) and CO2 storage materials. The selected samples were analyzed by different physical and chemical analytical techniques such as X-ray fluorescence spectroscopy (XRF), X-ray diffraction (XRD), particle size distribution (PSD), scanning electron microscopy (SEM), inductively coupled plasma atomic emission spectroscopy (ICP-OES), and simultaneous thermal analysis (STA) under different atmospheres (N2, CO2, and H2O/CO2). To evaluate the environmental impact, leaching tests were also performed. The amount of CaO as a promising candidate for TCES was verified by XRF analysis, which was in the range of 25–63% (w/w). XRD results indicate that the CaO lies as free lime (3–32%), calcite (21–29%), and silicate in all fly ash samples. The results of STA show that all fly ash samples could fulfill the requirements for TCES (i.e., charging and discharging). A cycling stability test of three cycles was demonstrated for all samples which indicates a reduction of conversion in the first three reaction cycles. The energy content of the examined samples was up to 504 kJ/kg according to the STA results. More energy (~1090 kJ/kg) in the first discharging step in the CO2/H2O atmosphere could be released through two kinds of fly ash samples due to the already existing free lime (CaO) in those samples. The CO2 storage capacity of these fly ash samples ranged between 18 and 110 kg per ton of fly ash, based on the direct and dry method. The leaching tests showed that all heavy metals were below the limit values of the Austrian landfill ordinance. It is viable to say that the valorization of fly ash from the pulp and paper industries via TCES and CO2 storage is plausible. However, further investigations such as cycling stability improvement, system integration and a life cycle assessment (LCA) still need to be conducted.

Co-cooking nonwoods with hardwoods

TAPPI Journal ◽  
2014 ◽  
Vol 13 (6) ◽  
pp. 19-24
Author(s):  
TROY RUNGE ◽  
CHUNHUI ZHANG
Keyword(s):  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Strength Properties ◽  
Agricultural Residues ◽  
Kraft Pulping ◽  
Pulp And Paper ◽  
Strength Increase ◽  
Xylan Content

Agricultural residues and energy crops are promising resources that can be utilized in the pulp and paper industry. This study examines the potential of co-cooking nonwood materials with hardwoods as means to incorporate nonwood material into a paper furnish. Specifically, miscanthus, switchgrass, and corn stover were substituted for poplar hardwood chips in the amounts of 10 wt %, 20 wt %, and 30 wt %, and the blends were subjected to kraft pulping experiments. The pulps were then bleached with an OD(EP)D sequence and then refined and formed into handsheets to characterize their physical properties. Surprisingly, all three co-cooked pulps showed improved strength properties (up to 35%). Sugar measurement of the pulps by high-performance liquid chromatography suggested that the strength increase correlated with enriched xylan content.

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