桉树科技
桉樹科技
안수과기
EUCALYPT SCIENCE & TECHNOLOGY
2012年
4期
1-8
,共8页
房桂干%邓拥军%叶利培%丛高鹏%梁芳敏
房桂榦%鄧擁軍%葉利培%叢高鵬%樑芳敏
방계간%산옹군%협리배%총고붕%량방민
尾巨桉%生物质精炼%预水解%硫酸盐法制浆%糠醛
尾巨桉%生物質精煉%預水解%硫痠鹽法製漿%糠醛
미거안%생물질정련%예수해%류산염법제장%강철
Eucalyptus urophylla × E .grandis%biomass refining%prehydrolysis%kraft pulping%furfural
研究了尾巨桉原料进行预水解硫酸盐法制浆过程中,预水解段对物料化学组分、水解液性质、水解液资源化利用及后续制浆的影响.研究结果表明:预水解段的温度和保温时间对原料水解后的化学组分及水解液的性质有较大影响.尾巨桉预水解较为适宜的水解条件为温度165℃左右,保温时间60~90 min ,水解液中主要成分为木糖和低聚木糖.在采气速度15 mL ? min -1、糖浓度17.8g ? L -1、温度180℃、硫酸浓度为0.25%的条件下制备糠醛,糠醛收率可达到71.89%.尾巨桉经过预水解,可以较大幅度降低后续制浆过程中蒸煮及漂白化学品的消耗.
研究瞭尾巨桉原料進行預水解硫痠鹽法製漿過程中,預水解段對物料化學組分、水解液性質、水解液資源化利用及後續製漿的影響.研究結果錶明:預水解段的溫度和保溫時間對原料水解後的化學組分及水解液的性質有較大影響.尾巨桉預水解較為適宜的水解條件為溫度165℃左右,保溫時間60~90 min ,水解液中主要成分為木糖和低聚木糖.在採氣速度15 mL ? min -1、糖濃度17.8g ? L -1、溫度180℃、硫痠濃度為0.25%的條件下製備糠醛,糠醛收率可達到71.89%.尾巨桉經過預水解,可以較大幅度降低後續製漿過程中蒸煮及漂白化學品的消耗.
연구료미거안원료진행예수해류산염법제장과정중,예수해단대물료화학조분、수해액성질、수해액자원화이용급후속제장적영향.연구결과표명:예수해단적온도화보온시간대원료수해후적화학조분급수해액적성질유교대영향.미거안예수해교위괄의적수해조건위온도165℃좌우,보온시간60~90 min ,수해액중주요성분위목당화저취목당.재채기속도15 mL ? min -1、당농도17.8g ? L -1、온도180℃、류산농도위0.25%적조건하제비강철,강철수솔가체도71.89%.미거안경과예수해,가이교대폭도강저후속제장과정중증자급표백화학품적소모.
This study examined the effect of prehydrolysis on the chemical composition , hydrolysate proper -ties , hydrolysate resource utilization and the subsequent pulping process of Eucalyptus urophylla × E .grandis .The results showed that temperature and time of the pre - hydrolysis had a great impact on the mate-rial chemical composition and hydrolysate properties . The main products in hydrolysate were xylose and xy -lo - oligosaccharide hexulosonic when pre - hydrolysed at 165 ℃ for 60 ~ 90 min . The process of producing furfural from hydrolysate was examined , and the yield of furfural reached 71 .9 % at the optimized conditions of 15 mL ? min -1 gas recovery rate , 17 .8 g ? L -1 of sugar concentration , and 0 .25 % of sulfuric acid concen-tration at 180 ℃ . There was a significant reduction in the chemical consumption of pulping and cooking pro -cess according to pre - hydrolysis .