Evaluation of the pulp properties produced from rice straw by monoethanolamine and potassium sulfite combined processes

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Akbari Amri M.; HEDJAZI S.; AHMADI M.

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Journal: IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES Year:2019 | Volume:10 | Issue:1 Page(s): 77-87

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Title

Evaluation of the pulp properties produced from rice straw by monoethanolamine and potassium sulfite combined processes

Author(s)

Akbari Amri M. | HEDJAZI S. | AHMADI M. | Issue Writer Certificate

Keywords

kappa numberQ3

monoethanolamineQ1

potassium sulfiteQ2

pulpQ2

rice strawQ1

Abstract

In this research, momoethanolamine in the charge of 15% with potassium sulfite in four levels as additive and also potassium sulfite in the charge of 14 % as NaOH with addition of monoethanlolamine in four levels were used as cooking liquor for pulping of rice straw. The combination of potassium sulfite/potassium hydroxide and sodium sulfite/sodium hydroxide in the ratio of 50/50 and sulfite sodium treatment in the alkalinity of 14 % as NaOH were selected as reference treatments. The results showed that the pulp produced using pure monoethanolamine (15%) has the highest yield and the highest kappa number. By using potassium sulfite as an additive in MEA pulping, the rejects, yield and kappa number was decreased and the lowest yield and the lowest kappa number was relevant to monoethanolamine (15%) combined with potassium sulfite (40%). In potassium sulfite (14%) pulping with increasing of monoethanolamine concentration as additive, the amount of total yield increased but the kappa number and reject contents decreased. The highest tensile index was relevant to monorthanolamine (15%) combined with potassium sulfite (10%) and the highest burs index belongs to potassium sulfite (14%) / monoethanolamine (20%) treatment. According to the optical properties, it was found that the highest brightness was achieved in potassium sulfite (14%) / monoethanolamine (20%). The highest opacity was relevant to the monoethanolamine 15% treatment. The results of this study showed that monoethanolamine process combined with potassium sulfite can be perform successfully on rice straw and pulp properties; especially mechanical characteristics in combination case are superior to soda and potassium hydroxide processes. Furthermore, utilization of the combined processes for the pulping of rice straw could be provided the possibility of the use of cooking liquor as organic fertilizers, which its recovery seems to be challenging.

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APA: Copy

Akbari Amri, M., HEDJAZI, S., & AHMADI, M.. (2019). Evaluation of the pulp properties produced from rice straw by monoethanolamine and potassium sulfite combined processes. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, 10(1 ), 77-87. SID. https://sid.ir/paper/184426/en

Vancouver: Copy

Akbari Amri M., HEDJAZI S., AHMADI M.. Evaluation of the pulp properties produced from rice straw by monoethanolamine and potassium sulfite combined processes. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES[Internet]. 2019;10(1 ):77-87. Available from: https://sid.ir/paper/184426/en

IEEE: Copy

M. Akbari Amri, S. HEDJAZI, and M. AHMADI, “Evaluation of the pulp properties produced from rice straw by monoethanolamine and potassium sulfite combined processes,” IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, vol. 10, no. 1 , pp. 77–87, 2019, [Online]. Available: https://sid.ir/paper/184426/en

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