Comprehensive study on pyrolysis and co-pyrolysis of walnut shell and bio-oil distillation residue

2018 ◽  
Vol 168 ◽  
pp. 178-187 ◽  
Author(s):  
Xiefei Zhu ◽  
Yiming Zhang ◽  
Haozhi Ding ◽  
Lingrui Huang ◽  
Xifeng Zhu
Keyword(s):  
Walnut Shell ◽  
Distillation Residue ◽  
Bio Oil ◽  
Comprehensive Study

scholarly journals A comprehensive study on adsorption behavior of some azo dyes from aqueous solution onto different adsorbents

2017 ◽  
Vol 76 (2) ◽  
pp. 478-489 ◽  
Author(s):  
Nihan Kaya
Keyword(s):  
Aqueous Solution ◽  
Activated Carbon ◽  
Azo Dyes ◽  
Binding Capacity ◽  
Agricultural Wastes ◽  
Walnut Shell ◽  
Isotherm Models ◽  
Adsorption Parameters ◽  
Dye Pollutants ◽  
Comprehensive Study

One of the major environmental problems is the existence of dye materials in water sources. This pollutant must be removed from water by appropriate methods. Although most of these methods are efficient for the treatment of waters contaminated with dye pollutants, they are very costly and commercially unattractive. Adsorption is one of the most popular methods for the removal of dye pollutants from water especially if the sorbent is inexpensive. Sorbents are classified as natural sorbents, commercial sorbents, and the sorbents obtained from industrial and agricultural wastes. Although commercial activated carbon is widely used in wastewater treatment applications, it is very expensive. In this study, usability of inexpensive materials – sepiolite as a natural adsorbent, and walnut shell and hazelnut shell as agricultural wastes – was investigated instead of commercial activated carbon to remove some azo dyes (methyl red, methyl orange and methyl yellow) from aqueous solution. Batch experiments were carried out to determine the effect of different adsorption parameters such as pH, initial dye concentration, contact time, adsorbent dose and temperature. The equilibrium of adsorptions was modeled using Langmuir and Freundlich isotherm models. This comprehensive study showed that these alternative adsorbents had sufficient binding capacity to remove these azo dyes from water.

Comprehensive study of the liquid products from slow pyrolysis of crambe seeds: Bio-oil and organic compounds of the aqueous phase

2019 ◽  
Vol 123 ◽  
pp. 78-88 ◽  
Author(s):  
Raquel V.S. Silva ◽  
Vinícius B. Pereira ◽  
Karen T. Stelzer ◽  
Tamyres A. Almeida ◽  
Gilberto A. Romeiro ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Aqueous Phase ◽  
Slow Pyrolysis ◽  
Bio Oil ◽  
Liquid Products ◽  
Comprehensive Study

scholarly journals Effects of ZnCl2 on the distribution of aldehydes and ketones in bio-oils from catalytic pyrolysis of different biomass

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5666-5678
Author(s):  
Bo-Zheng Li ◽  
Dong-Mei Bi ◽  
Qing Dong ◽  
Yong-Jun Li ◽  
Ya-Ya Liu ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Value Added ◽  
Walnut Shell ◽  
Corn Straw ◽  
Pine Wood ◽  
Rape Straw ◽  
Bio Oil ◽  
Chestnut Shell ◽  
Aldehydes And Ketones ◽  
Fuel Source

Bio-oil can serve as an alternative fuel source or resource to extract high value-added chemicals. This paper focuses on the effect of six types of biomass (rape straw, corn straw, walnut shell, chestnut shell, camphor wood, and pine wood) and ZnCl2 catalyst on the bio-oil yield and chemicals in the bio-oil, including aldehydes, ketones, and four high-value chemicals (1-hydroxy-2-butanone, propionaldehyde, 5-HMF, 2(5H)-furanon). The results showed that the yields of bio-oil decreased when the ZnCl2 was the catalyst. The ZnCl2 promoted the production of aldehydes and ketones. The higher contents of aldehydes and ketones were obtained from camphor and pine wood, at 58.9 wt% and 42.0 wt%, respectively. The ZnCl2 catalyst exhibited an active influence on the production of 1-hydroxy-2-butanone, propionaldehyde, 5-HMF, and 2(5H)-furanon. Compared with the non-catalytic pyrolysis, the content of 1-hydroxy-2-butanone and 2(5H)-furanone in bio-oil increased by 936% and 612%, respectively. The contents of propionaldehyde and 5-HMF in catalytic bio-oil were the highest from rape straw and increased by 193% and 86%, respectively.

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