Optimization of Parameters for Alkali Pretreatment on Coir Fiber for Biomass Production Using TOPSIS.

ABSTRACT

Coir is a lignocellulosic fiber which is quite preferable in the production of biofuels and chemicals. Conversion of cellulose and hemicellulose to biofuels requires five main unit processes out of which, pretreatment plays a major role because all subsequent processes depend upon the pretreatment results. Partial degradation of lignin, hemicellulose, and breakdown of the sugars also occur during the pretreatment of the coir. So, the optimal condition selection is vital. In this paper, an attempt has been made to optimize the parameters (time, NaOH concentration, and temperature) by Box-Behnken design in order to get the optimum level of lignin, hemicellulose, and cellulose. To obtain an ideal solution, the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) is used to rank the optimized solutions. Further, to find the authenticity of TOPSIS, the top three ranked solutions are again tested. It is observed that error percentage increases with an increase in rank order.

摘要

科伊尔是一种木质纤维素纤维，在生物燃料和化学制品的生产中具有较好的应用前景. 纤维素和半纤维素转化为生物燃料需要五个主要单元工艺，其中预处理起着重要作用，因为所有后续过程都取决于预处理结果. 在预处理过程中，木质素、半纤维素的部分降解和糖的分解也会发生. 因此，优化条件的选择是至关重要的. 本文通过箱式脱墨设计，对木素、半纤维素、纤维素等进行了时间、NaOH浓度和温度等参数的优化设计. 为了得到理想解，采用了基于理想解相似性的偏好排序技术对优化解进行排序. 此外，为了找到TOPSIS的真实性，前三名的解决方案再次进行测试. 结果表明，误差百分比随秩序的增加而增大.

KEYWORDS:

• Biomass
• biofuel
• coir
• optimization
• pretreatment
• TOPSIS

关键词:

• 生物量
• 生物燃料
• 科伊尔
• 优化
• 预处理
• 托普斯