Influence of different demineralization treatments on physicochemical structure and thermal degradation of biomass.
To study the catalytic role of alkali and alkaline earth metallic species and eliminate their negative impact during biomass thermal utilization, different leaching methods have been applied in numerous experiments. Thus it is necessary to investigate the potential influence on biomass physicochemical structure using different agents. Rice straw was selected to study the demineralization impact on physicochemical structure and pyrolysis characteristics. It is shown that strong acid leaching exhibited higher removal efficiency of minerals, but it introduced more notable impact on physicochemical structure of biomass comparing to water and weak acid leaching. Different leaching methods give chance to study catalysis characteristics of intrinsic metals on biomass thermal reaction. Contrast to alkaline earth metals especially Ca hindering thermal decomposition, alkali metals promoted this reaction obviously. In addition, comparing to physicochemical structure changes created by leaching process, the influence of removal of minerals played the dominant role in biomass thermal behavior.
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
Long
L
Jiang
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; China-EU Institute for Clean and Renewable Energy at Huazhong University of Science and Technology, Wuhan 430074, Hubei, China. Electronic address: husong_hust@hotmail.com.
Song
S
Hu
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; China-EU Institute for Clean and Renewable Energy at Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
Lun-Shi
LS
Sun
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China. Electronic address: susheng_sklcc@hotmail.com.
Sheng
S
Su
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
Kai
K
Xu
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
Li-Mo
LM
He
State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China; China-EU Institute for Clean and Renewable Energy at Huazhong University of Science and Technology, Wuhan 430074, Hubei, China.
Jun
J
Xiang
D019342:Acetic Acid / Q000737:chemistry; D000143:Acids / Q000737:chemistry*; D056804:Biofuels; D018533:Biomass; D002384:Catalysis; D005740:Gases; D006358:Hot Temperature; D006851:Hydrochloric Acid / Q000737:chemistry; D007477:Ions; D008670:Metals / Q000737:chemistry; D008673:Metals, Alkaline Earth / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D017942:Nitric Acid / Q000737:chemistry; D012275:Oryza; D010756:Phosphoric Acids / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013464:Sulfuric Acids / Q000737:chemistry; D013696:Temperature; D013818:Thermogravimetry; D014867:Water / Q000737:chemistry; D014934:Wood / Q000737:chemistry*
D000143:Acids; D056804:Biofuels; D005740:Gases; D007477:Ions; D008670:Metals; D008673:Metals, Alkaline Earth; D010756:Phosphoric Acids; D013464:Sulfuric Acids; D014867:Water; D017942:Nitric Acid; C030242:phosphoric acid; C033158:sulfuric acid; D019342:Acetic Acid; D006851:Hydrochloric Acid
Demineralization; Lignocellulosic biomass; Pyrolysis; TG–FTIR