GIEC OpenIR  > 中国科学院广州能源研究所
Effects of silica on chemical recovery in the direct causticization of wheat straw black liquor
Yuan, Hongyou3,4; Wu, Shubin1; Yin, Xiuli2; Guo, Daliang2; Wang, Guijin2; Zhou, Zhaoqiu2; Wu, Chuangzhi2
2016-08-01
Source PublicationTAPPI JOURNAL
Volume15Issue:8Pages:557-566
AbstractStraw black liquor is relatively difficult to recover using the Tomlinson process because of the presence of silica in inorganic components. Gasification with direct causticization might serve as a promising alternative; however, the interaction between silica and direct causticization agents needs to be evaluated. In this work, desilication was achieved using a laboratory-scale membrane electrolysis cell adopted from the chlor-alkali industry. Then raw and desilicated straw black liquors were carried out through direct causticization with titanium dioxide (TiO2) and recycled sodium tri-titanate (Na2O center dot 3TiO(2)) at 850 degrees C using a tube furnace. The results show that these two agents exhibit different silica transfer mechanisms. When using TiO2, approximately 80% of the silica is retained in the solid residue after hydrolysis because of chemical interactions. Almost all of the silica transfers to the hydrolysis-derived white liquor when using Na2O center dot 3TiO(2). This means that the process of treating straw black liquor by direct causticization might need additional lime causticization to improve the efficiency of sodium recovery. This observation also indicates that silica will not consume the direct causticization agent Na2O center dot 3TiO(2) after the initial step using TiO2. The sodium hydroxide (NaOH) yield was 60% when using raw black liquor as the feed to the Na2O center dot 3TiO(2) recycling tests and 80% when using desilicated straw black liquor. Considering the NaOH recovered in the electrolysis cell, the total NaOH yields exceed 85% of total titratable alkali. No detectable deterioration of the direct causticization agents was found within the limited number of recycles tested. A greater number of cycles need to be tested at a larger scale to evaluate the feasibility of applying a direct causticization process to straw black liquor.
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
WOS Subject ExtendedMaterials Science
WOS KeywordPRODUCT GAS-COMPOSITION ; TITANIUM-DIOXIDE ; RICE STRAW ; AUTOCAUSTICIZATION PROCESS ; HYDROGEN-PRODUCTION ; SODIUM TRITITANATE ; GASIFICATION ; LIGNIN ; REACTOR ; ELECTROLYSIS
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China (NSFC)(51506206 ; National Key Basic Research Program of China(2013CB228101) ; 51176195)
WOS SubjectMaterials Science, Paper & Wood
WOS IDWOS:000382526800006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/11911
Collection中国科学院广州能源研究所
Affiliation1.South China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Renewable Energy, Guangdong Key Lab New & Renewable Energy, Guangzhou, Guangdong, Peoples R China
3.South China Univ Technol, Guangzhou, Guangdong, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Guangdong, Peoples R China
First Author AffilicationGuangZhou Institute of Energy Conversion,Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yuan, Hongyou,Wu, Shubin,Yin, Xiuli,et al. Effects of silica on chemical recovery in the direct causticization of wheat straw black liquor[J]. TAPPI JOURNAL,2016,15(8):557-566.
APA Yuan, Hongyou.,Wu, Shubin.,Yin, Xiuli.,Guo, Daliang.,Wang, Guijin.,...&Wu, Chuangzhi.(2016).Effects of silica on chemical recovery in the direct causticization of wheat straw black liquor.TAPPI JOURNAL,15(8),557-566.
MLA Yuan, Hongyou,et al."Effects of silica on chemical recovery in the direct causticization of wheat straw black liquor".TAPPI JOURNAL 15.8(2016):557-566.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Yuan, Hongyou]'s Articles
[Wu, Shubin]'s Articles
[Yin, Xiuli]'s Articles
Baidu academic
Similar articles in Baidu academic
[Yuan, Hongyou]'s Articles
[Wu, Shubin]'s Articles
[Yin, Xiuli]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Yuan, Hongyou]'s Articles
[Wu, Shubin]'s Articles
[Yin, Xiuli]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.