These silica contents are less than that of black liquor obtained from pulping of rice straw (11–16%) and wheat straw (4.5-8%); greater than that of black liquor generated from pulping of sugarcane bagasse (1.2%) and bamboo (2–2.1%); but similar to that of black liquor generated from pulping of common reed (2.5–5%) .

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A study of black liquor and pyrolysis oil co-gasification in pilot scale A study of black liquor and pyrolysis oil co-gasification in pilot scale. ... Al ratio, and/or hierarchical porosity introduced via post-synthetic alkaline desilication treatment, have been evaluated as solid acid catalysts for esterification pretreatments of pyrolysis bio ...

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In this study, the impact of black liquor shocks on multiple stage biological treatment plant was studied. The tests were carried out in a lab scale plant and using a mathematical simulation model. The results showed good relation to a parallel situation at the Gruvön Mill. The MultiBio concept is persistent to short-term black liquor spills ...

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When evaluating the composition of black liquor using material balance techniques that estimate the organics from the wood and the inorganics from the cooking liquor, the solids content of the ...

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The testing results of the green liquor are shown in Table 1. Table 1. Composition of Green Liquor from Wheat Straw Pulping. Desilication of the Green Liquor. The green liquor was desilicized by the one-step carbon dioxide precipitation method reported earlier (Xia et al. 2013). Then the desilicized green liquor was mixed with the original ...

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The black liquor from the Edfu pulp mill was diluted using distilled water to reach 27% total solid content to be comparable with Quena black liquor, while that of Rakta was taken from the effluent of the concentrating pilot plant with 10% total solid content.

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Pilot plant for desilication of black liquor; ... The technology is being upscaled for demonstration on Pilot scale; Established test procedure for determination of lignosulphonate purity; Identified and developed lignin purification technique to improve its performance as feedstock for clean energy and other industrial applications;

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Pilot plant studies on partial desilication of 250 m3/day of liquor by venturi absorber showed 90% efficiency in China4. Gruen5 investigated lime desilication at elevated temperature using excess of lime (up to 6 times of stoichiometric quantity). Jayme6 modified the process using semi-concentrated black liquor (30% solids) and reduced

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water entering with the black liquor, the heat of reaction consumed in producing Na2S, and the heat carried out with the molten smelt. The amount of steam produced is typically about 3.5 kg per kg black liquor solids, but can range from 2.5 to about 3.8 kg steam per kg black liquor solids, depending on the thermal efficiency of the recovery boiler.

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James G. Speight, in Heavy Oil Recovery and Upgrading, 2019 3.4.6 Black Liquor. Black liquor is the spent liquor from the Kraft process in which pulpwood is converted into paper pulp by removing lignin and hemicellulose constituents and other extractable materials from wood to free the cellulose fibers. The equivalent spent cooking liquor in the sulfite process is usually called brown liquor ...

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Against these test Tappi J 139, (Oct 1988) (15) Judt, M. – Desilication problems can be overcome PPI Feb 1991, 65 cost imposts there are some offsets including the lower raw (16) Judt M. – Successful operation of industrial desilication plant in India material cost, the lower chemical costs for pulping and bleach- Straw – Opportunities ...

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of white liquor required from the recausticizing plant. Target values of Total Titratable Alkali (TTA) and Active Alkali (AA) and Sulfidity (% Na2S) are set by the digester design. Recausticizing system operators perform routine tests (ABC tests - See Tappi Test Methods for more details) to check that the plant is operating close to these design

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plant [4]. In year 1953, Gruen patented his so called Gruco Process for precipitating silica form black liquor by addition of lime or milk of lime. The lime treatment in this process is carried out for 5 - 10 min at 90 - 200°C with dilute black liquor with silica content of 7 - 10 gm per liter. The desilication …

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decades which has emerged in the form of development of various process technologies viz. Desilication of Silica rich black liquor, Thermal treatment of bagasse black liquor and removal of potassium & chlorides (Non-process ... has been successfully scaled up to pilot plant level. The present article covers the details of the

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These stages are: absorption of CO//2; conditioning of treated black liquor; separation of silica sludge from black liquor. After modifications to the system, the pilot plant obtained desilication ...

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The paper serves as a brief overview of the history and trends in the management and use of bauxite residue, outlining: the dimensions of the problem; the characteristics of bauxite residue; how methods of storage and disposal have developed over time and the implications for bauxite residue use; an example of a soil less free rehabilitation method; the technically successful uses; the ...

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pilot plant tests, TAPPI J, 71 (1988) ... Presence of silica in relatively high concentration causes several problems in chemical recovery plants. Desilication of black liquor, green liquor, soda ...

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History • Soda pulping process patented, 1854. • Soda recovery via incineration patented, 1865. • First successful soda mill, 1866. • Kraft pulping process patented by Dahl, 1884. • First commercially viable kraft mill, Sweden, 1885. • Kraft recovery furnace, 1930's.

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• Black liquor energy flow rate ≈ 200 –400 MW per plant. Black liquoris an excellent gasification ... The LTU Green Fuelsdemo plant Pilot gasification Pilot methanol + DME Field testing 3MW, 20 t DS/d 4 t/dmethanol/DME Trucks DME ... field test 8 trucks, to (1000 Km) Status Target

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The simulations were followed by pilot trials in the pulp mill. The purpose of the pilot trials was to identify the chemical compound that causes scaling and define which operational parameters would reduce the scale formation. In addition, the effect on the addition of tall oil brine to the feed-in black liquor was studied in the pilot plant.

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An Alternative Test Method to Acidified Salt Spray - Academic lecture ... Experiments and mathematical models of black liquor gasification - Influence of minor gas components on temperature, gas composition, and fixed carbon conversion - Academic article; ... Pilot plant study of 3-(methylamino) ...

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Black Liquor Desilication Black liquor desilication studies were conducted on semi pilot scale. The reactor consists of two communicating tubes of about 2.5 meter height and 10 em diameter, through which a high speed centrifugal pump circulates the black liquor to be treated. Near the upper end of the tube provision ismade

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Full Article. Efficient Desilication by Adsorption with Aluminum Salt-modified Bentonite from Green Liquor. Tao Lin, a, * Xue Li, a, * Yongjian Xu, a,b,c Xuefeng Yin, a Dingjun Zhang, c and Yong Tian c The objective of this work was to investigate the possibility of using Na-bentonite as a raw material to produce aluminum salt-modified bentonite (AlMB) for desilication of green liquor.

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In cooperation with the rice straw pulp mill of RAKTA, General Comp. for Paper Industry, Alexandria/Egypt, black liquor desilication tests have been made in a pilot plant with the aim of developing a large scale desilication process, which can be applied for alkaline black liquors prior to treating them in further conventional chemical recovery ...

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Gasification of black liquor. Patent Kohl, Arthur L [Woodland Hills, CA] A concentrated aqueous black liquor containing carbonaceous material and alkali metal sulfur compounds is treated in a gasifier vessel containing a relatively shallow molten salt pool at its bottom to form a combustible gas and a …

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11 Passinen B K, Lignin recovery from black liquor, Proc Symp Recovery of Chemicals, Helsinik, 1968. 12 Kopfmann K & Hudeczek W, Desilication of black liquor: Pilot plant tests, TAPPI J, 71 (1988) 140-177. 13 Chemical recovery plant for small pulp mills using non-wood raw materials, UNIDO/CPPRI Terminal Report Project

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material producing bleached variety of paper) located in Punjab. 3 sets of experiments on Desilication of black liquor each set of 50 litres of black liquor were carried out in pilot scale desilication plant using carbonation technique for selective precipitation. Desilicated black liquor was filtered and realkalized.

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The purpose of this research is to study the effect of aluminum desilicating agents on the viscosity of thick black liquor, its isothermal volume expansion coefficient (VIE), and desilication rate, with an expectation to provide some data and basic theories of aluminum salt for pilot plant testing of the alkali recovery system.

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Desilication of low alumina to caustic liquor seeded with sodalite or cancrinite: ... Experimental studies and pilot plant tests for acid leaching of low-grade copper oxide ores at the Tuwu Copper Mine: ... Effect of carbon black to facilitate galvanic leaching of copper from chalcopyrite in the presence of manganese(IV) oxide ...

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The Startup and The Operation Performance of The Twin Green Anode Plant at Maaden Aluminiumsmelter in Saudi Arabia (Pages: 991-996) Christophe Bouché, Abdulrahman Al-Shammari, Subah Al-Shammari, Nitin Yadav, Michel Gendron, Pasquale Calo,

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