Electrolysis of weak black liquor Part II: Effect of process parameters on the energy efficiency of the electrolytic cell

Cloutier, J.-N.; Azarniouch, M. K.; Callender, D.

doi:10.1007/bf00260690

Cited by 12 publications

(13 citation statements)

References 2 publications

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“…The pH determined for the BL sample was 12.4, close to previously reported values ranging from 10.7 to 12.8 [9, 30, 39, 58, 59]. The sulfite sample presented a pH of 2.27, falling in the range used in the sulfite pulping process (1.5–5) [3, 18].…”

Section: Resultssupporting

confidence: 83%

Developing a novel direct liquid fuel cell based on pulping liquors

et al. 2022

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This work reports preliminary studies to develop new direct liquid fuel cells that employ two by-products from kraft and sulfite pulp mills as the fuel, namely kraft black liquor (BL) and spent sulfite liquor (SSL). The composition and properties of BL and SSL are characterized, being determined a conductivity 40 times higher for BL than for SSL. The performance of the BL fuel cell (BLFC) and the SSL fuel cell (SSLFC) is assessed employing 5 M hydrogen peroxide solution as the oxidant at different pH values. For the BLFC, an anion-exchange membrane (AEM) is used, and for the SSLFC, both AEM and cation-exchange membrane (CEM) are tested. Different parameters that characterize the fuel cell performance (e.g., peak power density) are determined and compared with similar wastewaterbased fuel cells described in the literature. To the best of the authors' knowledge, it is the first time two pulp mill by-products (BL and SSL) are reported as fuels for application in fuel cells.

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Section: Resultssupporting

confidence: 83%

Developing a novel direct liquid fuel cell based on pulping liquors

et al. 2022

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“…Electrolysis can be used to treat black liquor even in the absence of a membrane (Cloutier et al 1993(Cloutier et al , 1994(Cloutier et al , 1995Blanco et al 1996;Negro et al 2005;Ghatak 2009a,b;Ghatak et al 2010). Cloutier et al (1995) reported that deposition of lignin onto the anode could be avoided by keeping the pH high. This approach has potential to regenerate NaOH at the same time separating some of the lignin.…”

Section: Electrolysis and Electrodialysismentioning

confidence: 99%

“…In the cited work, wheat straw and sugarcane bagasse lignin accumulated at the anode and hydrogen was evolved at the cathode. New: Electrolysis and Electrodialysis Electrolysis can be used to treat black liquor even in the absence of a membrane (Cloutier et al 1993(Cloutier et al , 1994(Cloutier et al , 1995Blanco et al 1996;Negro et al 2005;Ghatak 2009a,b;Ghatak et al 2010). Cloutier et al (2005) reported that deposition of lignin onto the anode could be avoided by keeping the pH high.…”

Section: Erratummentioning

confidence: 99%

Lignin recovery from spent alkaline pulping liquors using acidification, membrane separation, and related processing steps: A review

Hubbe¹,

Alén²,

Paleologou³

et al. 2019

BioRes

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The separation of lignin from the black liquor generated during alkaline pulping is reviewed in this article with an emphasis on chemistry. Based on published accounts, the precipitation of lignin from spent pulping liquor by addition of acids can be understood based on dissociation equilibria of weak acid groups, which affects the solubility behavior of lignin-related chemical species. Solubility issues also govern lignin separation technologies based on ultrafiltration membranes; reduction in membrane permeability is often affected by conditions leading to decreased solubility of lignin decomposition products and the presence of colloidal matter. Advances in understanding of such phenomena have potential to enable higher-value uses of black liquor components, including biorefinery options, alternative ways to recover the chemicals used to cook pulp, and debottlenecking of kraft recovery processes.

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“…(2) direct ultrafiltration of the alkaline liquor [38,39]; and (3) electrolysis or electrodialysis to simultaneously precipitate lignin, regenerate caustic, and produce H 2 [40,41]. Several approaches for employing CO 2 acidification for Kraft lignin recovery have been the subject of pilot-and demonstration-scale processes [42][43][44].…”

Section: Recovery and Utilization Of Non-hemicellulose Fractionsmentioning

confidence: 99%