Abstract:
:Rice husk is an abundant agricultural by-product reaching the output of 80 million tons annually in the world. The most common treatment method of rice husk is burning or burying, which caused serious air pollution and resource waste. In order to solve this problem, a new method is proposed to comprehensively utilize the rice husk in this paper. Firstly, the D-xylose was prepared from the semicellulose via dilute acid hydrolysis. Secondly, the lignin was separated via organic solvent pulping from the residue. Finally, the amorphous ultrafine silica was prepared via pyrolysis of the residue produced in the second process. In this way, the three main contents of rice husk (semicellulose, lignin, and silica) are consecutively converted to three fine chemicals, without solid waste produced. The yields of D-xylose and organosolv lignin reach 58.2% and 58.5%, respectively. The purity and specific surface of amorphous ultrafine silica reach 99.92% and 225.20 m(2)/g.
journal_name
Bioinorg Chem Appljournal_title
Bioinorganic chemistry and applicationsauthors
Zhang H,Ding X,Wang Z,Zhao Xdoi
10.1155/2014/603481subject
Has Abstractpub_date
2014-01-01 00:00:00pages
603481eissn
1565-3633issn
1687-479Xjournal_volume
2014pub_type
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