Process Design & Engineering Cell, CSIR-Central Salt & Marine Chemicals Research Institute, G.B. Marg, Bhavnagar 364002, Gujarat, India.
CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal.
Bioresour Technol. 2017 Jun;234:233-242. doi: 10.1016/j.biortech.2017.03.007. Epub 2017 Mar 10.
Kappaphycus alvarezii seaweed belongs to the class of red alga (Rhodophyta). The granules obtained after recovery of "sap" (liquid plant stimulant) from freshly harvested alga is a promising biomass feedstock for energy application. Herein we report the kinetic behaviour of the granules using thermogravimetric analysis (TGA) at different heating rates in N atmosphere and thermogravimetric-mass spectrometry (TG-MS) analysis. Sawdust as lignocellulosic biomass is considered for comparative study. Four different kinetic models (i) multilinear regression technique, (ii) Friedman method, (iii) Flynn-Wall-Ozawa (FWO) method and (iv) Kissinger-Akahira-Sunose (KAS) method are used to evaluate the apparent activation energy (E), the pre-exponential factor (A) and the overall reaction order (n). Maximum SO peak at 300°C and 950°C (from TG-MS), indicates that slow pyrolysis at 500°C, with a packed bed lime scrubber at the outlet during temperature rise, is the best suited thermochemical pathway for energy harnessing.
麒麟菜属于红藻门（Rhodophyta）。从新鲜收割的海藻中回收“汁液”（植物刺激素液体）后得到的颗粒是一种很有前途的能源应用生物质原料。本文使用热重分析（TGA）在 N 气氛和热重-质谱（TG-MS）分析中不同加热速率下研究了颗粒的动力学行为。木屑作为木质纤维素生物质进行了比较研究。使用四种不同的动力学模型（i）多元线性回归技术、（ii）弗里德曼法、（iii）弗林-沃尔奥扎瓦（FWO）法和（iv）凯辛格-阿哈拉-松诺塞（KAS）法来评估表观活化能（E）、指数前因子（A）和总反应级数（n）。在 300°C 和 950°C 处的最大 SO 峰（来自 TG-MS）表明，在升温过程中在出口处使用填充床石灰洗涤器进行 500°C 的慢速热解是最适合用于能量利用的热化学途径。
