ATTEMPTED REMOVAL OF METAL-IONS AND SUBSEQUENT VACUUM PYROLYSIS OF BARKS FROM 5 SPECIES OF SOFTWOODS

被引：2

作者：

QIU, HX ^{[1
]}

RICHARDS, GN ^{[1
]}

机构：

[1] UNIV MONTANA,WOOD CHEM LAB,MISSOULA,MT 59812

来源：

JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY | 1989年 / 9卷 / 02期

关键词：

Chromatographic Analysis--Gas - Metallic Compounds--Removal;

D O I：

10.1080/02773818908050297

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

Samples of whole bark were collected from sub-alpine fir, Engelmann spruce, Douglas fir, western larch and lodgepole pine. Attempts to remove metal ions from the barks by ion exchange with dilute acid at room temperature showed that up to one third of these ions (especially calcium) are inaccessable to aqueous acid and hence not removed. The barks were subjected to vacuum pyrolysis before and after acid washing and the tars analyzed by gas chromatography as trimethylsilyl ethers. The incomplete removal of metal ions resulted in significant increase in pyrolytic production of the major products derived from polysaccharides (viz. levoglucosan and anhydroarabinose).

引用

页码：251 / 263

页数：13

共 6 条

[1] THE INFLUENCE OF EXCHANGEABLE CATIONS ON THE CARBONIZATION OF BIOMASS [J].