摘要
采用热重-傅里叶红外光谱联用(TG-FTIR)技术对桉木碱性过氧化氢法(APMP)制浆废液固形物(ASLS)热裂解过程中主要挥发性产物的释放规律进行了研究,结合高温静态水平管式炉快速热解及气相色谱(GC)、气相色谱-质谱联用技术(GC-MS)对挥发分组成进行了确认.TG-FTIR结果表明,ASLS热解过程分为3个阶段,热解温度区间分别为200～371℃、371～530℃和745～986℃,第1热解阶段的主要产物为CO2,占总产物的90%以上,第2热解阶段的主要产物为CO2、CH4、醛酮类化合物和酚醇类化合物,第3热解阶段的主要产物为CO.GC分析结果显示,H2、CH4、CO、CO2、C2H4和C2H6是热解的主要不可冷凝产物.GC-MS分析结果表明:醛酮类和酚类化合物是ASLS热解过程中的主要可冷凝产物,这与TG-FTIR结果相一致;醛酮类化合物在600℃左右达到最大产率41.43%.
The APMP （ Alkaline Peroxide Mechanical Pulp） spent liquor solid （ASLS） of Eucalyptus was prepared and pyrolyzed, and the release mechanism of main volatile products during the pyrolysis was investigated by means of TG-FTIR. Then, the volatile components are confirmed by combining a fast pyrolysis in a high-temperature static horizontal tube furnace with GC and GC-MS. TG-FFIR analysis shows that the pyrolysis of ASLS consists of three stages, respectively at temperatures of 200 - 371 ℃, 371-530℃, 745 - 986 ℃, and the correspon-ding main products are CO2 with a content of more than 90% at the first pyrolysis stage, CO2 , CH4 , aldehydes and ketones, phenols and alcohols at the second pyrolysis stage and CO at the third pyrolysis stage. GC results indicate that H2 , CH4, CO, CO2, C2H4 and C2H6 are the main non-condensible products. GC-MS results reveal that aldehydes and ketones as well as phenols are the main condensible products, which accords well with the TG-FTIR results, and that the maximum yield of aldehydes and ketones is up to 41.43% at about 600℃.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第9期1-7,共7页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(21176095
51176195)
教育部科技支撑计划项目(2012AA101806)
广东省科技计划项目(2011A090200006)
