Acid hydrolysis of cellulose in zinc chloride solution

1995 ◽  
Vol 51-52 (1) ◽  
pp. 21-28 ◽  
Author(s):  
N. J. Cao ◽  
Q. Xu ◽  
L. F. Chen
Keyword(s):  
Acid Hydrolysis ◽  
Zinc Chloride ◽  
Chloride Solution ◽  
Zinc Chloride Solution ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

scholarly journals Acid Hydrolysis of Cellulose as the Entry Point into Biorefinery Schemes

ChemSusChem ◽  
2010 ◽  
Vol 3 (3) ◽  
pp. 296-296 ◽  
Author(s):  
Roberto Rinaldi ◽  
Ferdi Schüth
Keyword(s):  
Acid Hydrolysis ◽  
Entry Point ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

scholarly journals New methods of acid hydrolysis of cellulose and plant raw materials

2021 ◽  
Vol 57 (1) ◽  
pp. 119-128
Author(s):  
V. S. Boltovsky
Keyword(s):  
Acid Hydrolysis ◽  
Plant Biomass ◽  
Raw Materials ◽  
Agricultural Waste ◽  
Feed Additives ◽  
Process Conditions ◽  
Catalytic Systems ◽  
Plant Raw Materials ◽  
Hydrolysis Of Cellulose ◽  
Hydrolysis Of

Prospects for the development of hydrolysis production are determined by the relevance of industrial use of plant biomass to replace the declining reserves of fossil organic raw materials and increasing demand for ethanol, especially for its use as automobile fuel, protein-containing feed additives that compensate for protein deficiency in feed production, and other products. Based on the review of the research results presented in the scientific literature, the analysis of modern methods of liquid-phase acid hydrolysis of cellulose and various types of plant raw materials, including those that differ from traditional ones, is performed. The main directions of increasing its efficiency through the use of new catalytic systems and process conditions are identified. It is shown that the most promising methods for obtaining monosaccharides in hydrolytic processing of cellulose and microcrystalline cellulose, pentosan-containing agricultural waste and wood, are methods for carrying out the process at elevated and supercritical temperatures (high-temperature hydrolysis), the use of new types of solid-acid catalysts and ionic liquids. 

Pyrolysis Characteristics of Blends from Coal and Polyethylene

2014 ◽  
Vol 887-888 ◽  
pp. 993-996
Author(s):  
Fu Sheng Yang ◽  
Ming Zhang ◽  
Ben Long Wei ◽  
Min Qun Lin
Keyword(s):  
Zinc Chloride ◽  
Chloride Solution ◽  
Chemical Interaction ◽  
Reaction Rates ◽  
Iron Ions ◽  
Scanning Calorimetry ◽  
Zinc Chloride Solution ◽  
Pyrolysis Characteristics ◽  
Coal Powder ◽  
Parent Coal

Shenfu coal (SFC) was pulverized and modified with planetary ball mill. Maceral separation of the coal was performed by means of density gradient centrifuge in zinc chloride solution. Blends from low density polyethylene (LDPE) and parent coal powder, iron ions loaded coal powder, or floated maceral fractions were prepared in co-rotation twin-screw extruder. Pyrolysis characteristics were investigated based on differential scanning calorimetry (DSC) measurements, apparent activation energies were calculated according to Kissiger and Ozawa methods. It is found that chemical interaction between SFC and LDPE is attributed to their overlapped pyrolysis temperature regions, leading to instant and rapid propagation and termination of macromolecular chains produced in the co-pyrolysis. Iron ions loaded in the coal can facilitate formation of radicals with acceleration in chemical reaction rates. Thermal degradation of LDPE is rate-determining step in co-pyrolysis of the coal and the polyethylene. Maceral fraction floated in 1.25g·cm-3zinc chloride solution is more reactive with polyethylene due to its higher content in aliphatic hydrocarbon and hydrogen, playing a role of excellent hydrogen donor to LDPE in the co-pyrolysis.

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