View in EDS

Catalytic pyrolysis of recalcitrant, insoluble humin byproducts from C6 sugar biorefineries.

Saved in:
Bibliographic Details
Title: Catalytic pyrolysis of recalcitrant, insoluble humin byproducts from C6 sugar biorefineries.
Authors: Agarwal, Shilpa1, van Es, Daan2, Heeres, Hero Jan1 h.j.heeres@rug.nl
Source: Journal of Analytical & Applied Pyrolysis. Jan2017, Vol. 123, p134-143. 10p.
Subjects: Humins, Pyrolysis, Waste products, Sugar factories, Hydroxymethylfurfural
Abstract: Humins are solid by-products formed during the acid-catalysed conversions of C-6 sugars to platform chemicals like hydroxymethylfurfural and levulinic acid. We here report an experimental study on the liquefaction/depolymerisation of humins using catalytic pyrolysis. Synthetic humins (SH) and crude industrial humins (CIH, including purified industrial (PIH) samples) from the acid-catalysed conversion of C-6 sugars to HMF/LA were tested. Thermal degradation patterns of both humin types vary significantly. Major thermal decomposition of the industrial humins was observed between 50 and 650 °C (weight loss approx. 66 wt%), whereas, major weight loss was observed between 200 and 800 °C for the synthetic humins (47 wt%). A series of catalytic pyrolysis tests with synthetic humins and different zeolites were performed using a PTV-GC/MS (humin to catalyst wt ratio of 0.2, 550 °C). Best results were obtained using HZSM-5 (SiO 2 /Al 2 O 3 = 50). For quantitative analysis, a gram scale pyrolysis unit was used, giving a product oil (9–11 wt% on humin intake) with approximately 1.5 and 10 wt% aromatics from synthetic and crude industrial humins, respectively. GPC data on the product oils clearly shows the breakdown of the humin structure into low molecular weight species. The HHV value of the liquid products (up to 41 MJ kg −1 ) is considerably higher than that of the crude industrial humin feed (21–24 MJ kg −1 ). [ABSTRACT FROM AUTHOR]
Copyright of Journal of Analytical & Applied Pyrolysis is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Humins are solid by-products formed during the acid-catalysed conversions of C-6 sugars to platform chemicals like hydroxymethylfurfural and levulinic acid. We here report an experimental study on the liquefaction/depolymerisation of humins using catalytic pyrolysis. Synthetic humins (SH) and crude industrial humins (CIH, including purified industrial (PIH) samples) from the acid-catalysed conversion of C-6 sugars to HMF/LA were tested. Thermal degradation patterns of both humin types vary significantly. Major thermal decomposition of the industrial humins was observed between 50 and 650 °C (weight loss approx. 66 wt%), whereas, major weight loss was observed between 200 and 800 °C for the synthetic humins (47 wt%). A series of catalytic pyrolysis tests with synthetic humins and different zeolites were performed using a PTV-GC/MS (humin to catalyst wt ratio of 0.2, 550 °C). Best results were obtained using HZSM-5 (SiO 2 /Al 2 O 3 = 50). For quantitative analysis, a gram scale pyrolysis unit was used, giving a product oil (9–11 wt% on humin intake) with approximately 1.5 and 10 wt% aromatics from synthetic and crude industrial humins, respectively. GPC data on the product oils clearly shows the breakdown of the humin structure into low molecular weight species. The HHV value of the liquid products (up to 41 MJ kg −1 ) is considerably higher than that of the crude industrial humin feed (21–24 MJ kg −1 ). [ABSTRACT FROM AUTHOR]
ISSN:01652370
DOI:10.1016/j.jaap.2016.12.014