Potassium hydroxide pulping of rice straw in biorefinery initiatives

Jahan, M. Sarwar; Haris, Fahmida; Rahman, M. Mostafizur; Samaddar, Purabi Rani; Sutradhar, Shrikanta

doi:10.1016/j.biortech.2016.08.008

Cited by 48 publications

(19 citation statements)

References 19 publications

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“…Because the spent liquor of KOH pretreatment contains potassium, it could be used for the production of potash fertilizer to put nutrients back to soils for the clean and sustainable production. 24,25 On the other hand, KOH pretreatment could be implemented under relatively mild conditions due to the strong basicity of KOH. 26 Therefore, KOH pretreatment has a high potential feasibility.…”

Section: Introductionmentioning

confidence: 99%

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

Chi

Liu

et al. 2019

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

Chi

Liu

et al. 2019

RSC Adv.

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“…Silica and lignin were separated from the black liquor of KOH pulping. The amount of recovered silica, lignin and hemicelluloses were 10.4%, 8.4% and 13.0% (Jahan et al 2016b). The papermaking properties of KOH pulp from rice straw were slightly better than those of corresponding NaOH pulp.…”

Section: Introductionmentioning

confidence: 92%

“…These raw materials were cooked under identical cooking conditions based on our previous cooking conditions in soda process (Jahan et al, 2004(Jahan et al, , 2007(Jahan et al, , 2016b(Jahan et al, , 2016c. Temperature and material to liquor ratio for dhaincha and jute stick were 170 o C and 1:5 and for wheat straw and corn stalks were 150 o C and 1:6, respectively.…”

Section: Pulpingmentioning

confidence: 99%

“…Recently our group finds interesting results on potassium hydroxide pulping of kash (Saccharum sponteneum (Jahan et al, 2016a) and rice straw (Jahan et al, 2016b). Kash was easily delignified to kappa number 12.5 with pulp yield of 52.9% at the conditions of 14% KOH expressed as NaOH for 2 h at 150 o C. At this condition, pulp yield in soda (NaOH) process was 0.3% lower with higher kappa number.…”

Section: Introductionmentioning

confidence: 97%

“…At the optimum KOH pulping conditions (alkali charge 12% as NaOH, cooking temperature 150 °C for 2 h and material to liquor ratio, 1:6), rice straw produced pulp yield of 42.4% with kappa number 10.3. KOH pulp bleached to 85% brightness by D 0 EpD 1 bleaching sequences with ClO 2 consumption of 25 kg/ton of pulp (Jahan et al, 2016b). Silica and lignin were separated from the black liquor of KOH pulping.…”

Section: Introductionmentioning

confidence: 99%

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Potassium hydroxide pulping of four non-woods

Sutradhar

Sarkar²,

Nayeem

et al. 2018

Bangladesh J. Sci. Ind. Res.

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Four non-woods such as, dhaincha (Sesbania bispinosa), jute stick (Corchorus capsularis), wheat straw (Triticum aestivum) and corn stalks (Zea mays) were cooked by potassium hydroxide (KOH) at the optimum conditions of soda pulping. Dhaincha, wheat straw and corn stalks were delignified to kappa number 19.4, 13.6 and 19, respectively, while jute stick was not delignified sufficiently (kappa number 32.5). All these four raw materials maintained good yield in KOH process. Dhaincha produced the highest pulp yield (50.5%) and wheat straw had the lowest pulp yield (44.7). All pulps were bleached by D0EpD1 bleaching sequences in identical bleaching conditions. Final pulp brightness reached to above 80% ISO except jute stick pulp. Jute stick pulp reached to 74.9% brightness only after the consumption of 30 kg ClO2/ ton of pulp. The overall bleaching yields were 92.6%, 88.4%, 90.1 and 90.8% for dhaincha, jute stick, wheat straw and corn stalks pulps, respectively. The oSR of these four non-wood bleached pulps was above 20, consequently improved papermaking in the unrefined state. Beating rapidly increased papermaking properties, as for example, the tensile index of dhaincha pulps increased from 49 N.m/g in the unrefined pulp to 90 N.m/g in the beaten 50 oSR. It can be seen that KOH is a good substitute to soda process for non-wood.Bangladesh J. Sci. Ind. Res.53(1), 1-6, 2018

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Alternative initiatives for non‐wood chemical pulping and integration with the biorefinery concept: A review

Jahan

Rahman

2020

Biofuels Bioprod Bioref

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Conventional pulping processes, such as soda, soda‐Antraquinone (AQ), and kraft, are currently used for non‐wood pulping. The main challenges of non‐wood pulping in conventional pulping processes are (1) large amounts of silica cause silica‐related operational difficulties in the process; (2) large amounts of fines/parenchyma cells decrease the drainage; and (3) the bulky nature of raw materials increases the collection/transportation cost, hampering large‐scale commercial operations. Alternative pulping processes are therefore being developed. This paper reviews the current status of alternative non‐wood pulping processes and their integration with the biorefinery concept. Several promising methods have been investigated at the laboratory or pilot scale. Organic acid and potassium hydroxide pulping processes are attractive alternatives for non‐wood pulping. Dissolved lignin and hemicelluloses in spent liquor can lead to the production of valuable co‐products, fitting well with the integrated biorefinery concept. Non‐wood biomass can be important raw material for pulping in forest‐deficient countries. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd

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Potassium hydroxide pulping of rice straw in biorefinery initiatives

Cited by 48 publications

References 19 publications

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

A clean and effective potassium hydroxide pretreatment of corncob residue for the enhancement of enzymatic hydrolysis at high solids loading

Potassium hydroxide pulping of four non-woods

Alternative initiatives for non‐wood chemical pulping and integration with the biorefinery concept: A review

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