Journal
APPLIED THERMAL ENGINEERING
Volume 73, Issue 1, Pages 357-361Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2014.07.068
Keywords
Catalytic pyrolysis; Microalgae; Alkali; Alkaline earth metals; Thermogravimetric analysis; Kinetic
Funding
- National Basic Research Program of China (973 Program) [2011CB201500, 2013CB228100]
- Guangdong Key Laboratory Of Clean Energy Technology [2008A060301002]
- General Administration Of Quality Supervision, Inspection Of Public Projects [20140159]
- National Natural Science Foundation Of Guangdong Province [10351007006000000]
- Guangzhou Major Scientific Research Projects [2008A1-D0011]
- Key Laboratory of New Lithium-ion Battery and Mesoporous Materials [20110214]
- Fundamental Research Funds for the Central Universities, SCUT [x2dlD2105280]
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In this paper, thermogravimetric (TG) analysis and kinetic modeling are applied to study the effects of alkaline earth and alkali metal compounds on catalytic thermal decomposition of microalgae. When alkaline earth and alkali metal compounds are added, the initial thermal degradation temperatures increased by about 3.2-10.2 K, and the final temperatures reduced by about 3.5-9.4 K. The results show that CaO, MgO, K2CO3, BaCO3 and Na2CO3 may shorten the time of pyrolysis, implying that alkaline earth and alkali metal compounds may promote the process of thermal degradation of organic matters. The first maximum weight loss rate is in the order of Na2CO3 > CaO > K2CO3 > BaCO3 > MgO > no additive. En, (weight means activation energy) varies from 99.60 to 134.05 kJ mol(-1), which implies ignorable overall activation energies (Em) after alkaline earth and alkali metal compounds are added. (C) 2014 Elsevier Ltd. All rights reserved.
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