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Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives
This study investigated and compared the product characteristics of pyrolysis lignin under different catalytic effects resulting from various calcium salts. The pyrolysis of lignin was conducted in a fixed-bed reactor with calcium salt additives, which included CaCl(2), Ca(OH)(2), and Ca(HCOO)(2). T...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567069/ https://www.ncbi.nlm.nih.gov/pubmed/31100820 http://dx.doi.org/10.3390/ma12101609 |
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author | Cui, Yong Wang, Wenliang Chang, Jianmin |
author_facet | Cui, Yong Wang, Wenliang Chang, Jianmin |
author_sort | Cui, Yong |
collection | PubMed |
description | This study investigated and compared the product characteristics of pyrolysis lignin under different catalytic effects resulting from various calcium salts. The pyrolysis of lignin was conducted in a fixed-bed reactor with calcium salt additives, which included CaCl(2), Ca(OH)(2), and Ca(HCOO)(2). The compositions of gas and bio-oil were detected using gas chromatography/mass spectrometry (GC/MS). The characterizations of chars were examined using Brunauer–Emmett–Teller (BET) surface area and scanning electron microscopy (SEM). The results indicate that all three types of calcium salts helped to promote bio-oil yield and inhibit gas and char from forming. Regarding the composition of gas products, calcium salt additives increased the concentrations of H(2) and CH(4) while decreasing the concentration of CO. In addition, calcium salt additives facilitated the formation of phenol and alkyl-phenols in bio-oil, but reduced the yields of guaiacol and vanillin, in the order CaCl(2) < Ca(OH)(2) < Ca(HCOO)(2). Furthermore, when compared with the addition of CaCl(2), the chars prepared by the addition of Ca(OH)(2) and Ca(HCOO)(2) had relatively higher BET surface areas. In conclusion, Ca(HCOO)(2) had the greatest positive influence in regard to the product quality of lignin pyrolysis whilst also elevating the yield of value-added chemicals in bio-oils. |
format | Online Article Text |
id | pubmed-6567069 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-65670692019-06-17 Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives Cui, Yong Wang, Wenliang Chang, Jianmin Materials (Basel) Article This study investigated and compared the product characteristics of pyrolysis lignin under different catalytic effects resulting from various calcium salts. The pyrolysis of lignin was conducted in a fixed-bed reactor with calcium salt additives, which included CaCl(2), Ca(OH)(2), and Ca(HCOO)(2). The compositions of gas and bio-oil were detected using gas chromatography/mass spectrometry (GC/MS). The characterizations of chars were examined using Brunauer–Emmett–Teller (BET) surface area and scanning electron microscopy (SEM). The results indicate that all three types of calcium salts helped to promote bio-oil yield and inhibit gas and char from forming. Regarding the composition of gas products, calcium salt additives increased the concentrations of H(2) and CH(4) while decreasing the concentration of CO. In addition, calcium salt additives facilitated the formation of phenol and alkyl-phenols in bio-oil, but reduced the yields of guaiacol and vanillin, in the order CaCl(2) < Ca(OH)(2) < Ca(HCOO)(2). Furthermore, when compared with the addition of CaCl(2), the chars prepared by the addition of Ca(OH)(2) and Ca(HCOO)(2) had relatively higher BET surface areas. In conclusion, Ca(HCOO)(2) had the greatest positive influence in regard to the product quality of lignin pyrolysis whilst also elevating the yield of value-added chemicals in bio-oils. MDPI 2019-05-16 /pmc/articles/PMC6567069/ /pubmed/31100820 http://dx.doi.org/10.3390/ma12101609 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Cui, Yong Wang, Wenliang Chang, Jianmin Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives |
title | Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives |
title_full | Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives |
title_fullStr | Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives |
title_full_unstemmed | Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives |
title_short | Study on the Product Characteristics of Pyrolysis Lignin with Calcium Salt Additives |
title_sort | study on the product characteristics of pyrolysis lignin with calcium salt additives |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6567069/ https://www.ncbi.nlm.nih.gov/pubmed/31100820 http://dx.doi.org/10.3390/ma12101609 |
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