Catalytic fast pyrolysis

Dobele G, Rossinskaja G, Telysl cva G, Meier D, Radtke S, Faix O, Levoglucosenone A product of catalytic fast pyrolysis of cellulose , These proceedings... 

Levoglucosenone - a Product of Catalytic Fast Pyrolysis of Cellulose... 

The goal of the present study was to investigate the effect of structural peculiarities of different types of cellulose on levoglucosenone formation under catalytic fast pyrolysis conditions. Moreover, amount of phosphoric acid and pretreatment temperature should be determined to provide maximum possible yields of levoglucosenone. 

Catalytic fast pyrolysis Re-USY, H-ZSM-5, P-zeolite Catalyst ensures further cracking of the pyrolysis intermediates and oxygen removal, resulting in the formation of hydrocarbons [61]... 

Cheng Y-T, Jae J, Shi J, Fan W, Huber GW (2012) Production of renewable aromatic compounds by catalytic fast pyrolysis of lignocellulosic biomass with bifiinctional Ga/ZSM-5 catalysts. Angew Chem Int Ed 51(6) 1387-1390... 

Carlson TR, Vispute TP, Huber GW (2008) Green gasoline by catalytic fast pyrolysis of solid biomass derived compounds. ChemSusChtan l(5) 397-400... 

Ma ZQ, Troussard E, van Bokhoven JA (2012) Controlling the selectivity to chemicals from lignin via catalytic fast pyrolysis. Appl Catal A 423 130... 

Yu YQ, Li XY, Su L, Zhang Y, Wang YJ, Zhang HZ (2012) The role of shape selectivity in catalytic fast pyrolysis of lignin with zeolite catalysts. Appl Catal A 447 115... 

Based on results with HZSM-5, researchers have investigated the use of metal additives on HZSM-5 to improve aromatics production or tune selectivity. The Huber group has shown marked improvement with the use of gallium exchanged HZSM-5 for the catalytic fast pyrolysis of furans. In this report, the gallium should be incorporated by exchange rather than incipient wetness or framework substitution to... 

CFP [Catalytic Fast Pyrolysis] A process for converting lignocellulosic biomass into a mixture of aromatic hydrocarbons, notably / -xylene. It uses a fluidized bed at 500°C-1000°C and a modified ZSM-5 zeolite catalyst. Invented by G.W. Huber and colleagues at the University of Massachusetts-Amherst and licensed through Anellotech. The first plant is scheduled for completion in 2014. 

To begin, we discuss the upgrading of bio-oils by means of cracking and hydrodeoxygenatioa This will be followed by upgrading pyrolysis vapors and cataljdic pyrolysis. Finally, a short overview of catalytic fast pyrolysis of lignin will close this part of the chapter. 

During the in-bed catal54ic fast pyrolysis, the pyrolysis is carried out in the direct presence of the zeolite, that is the substrate and the catalyst are in physical contact during pyrolysis. Compared to cataljdic upgrading of pyrolysis vapors, the zeolite impact in catalytic fast pyrolysis is much higher due to a better contact of the substrate and intermediates with the zeoUte. A disadvantage of catalytic fast pyrolysis is the higher coke deposition on the... 

Reaction scheme of the catalytic fast pyrolysis of glucose overZSM-5. Reprinted with permission from Elsevier (From Carlson TRJaeJ, Lin Y-C, TompsettCA, Huber GW. Catalytic fast pyrolysis of ucose with HZSM-5 the combined homogeneous and heterogeneous reactions. J Cata 20 0,270 110—24). 

Huber et al. performed the catalytic fast pyrolysis of pine wood with spray-dried ZSM-5 in a bubbling fluidized-bed reactor with co-feeding of different alcohols, viz. methanol,... 

In summary, catalytic fast pyrolysis is a promising technology once the main drawbacks, such as severe coking, deep cracking, and hydrothermal stability of the zeolite are solved. 

As described in the previous section. Brown et al. obtained an aromatic yield of 1% in the catalytic fast pyrolysis of milled wood lignin with ZSM-5 at 600°C, which was considerable lower than the yields obtained from cellulose and hemicellulose [286]. Also, the coke yield from lignin (59%) was much higher. Huber et al. used the lignin residue obtained after H SO hydrolysis of maple wood as a substrate for pyrolysis in a fluidized-bed reactor with spray-dried ZSM-5 at 600°C [298]. Next to lignin, this substrate also contains humic residue, a compound also composed of phenolic entities. An aromatic and olefin yield of only 2% and 1% was obtained, compared to respective yields of 15% and 7% from pure maple wood. The coke yield from the solid residue (69%) was also much higher than the coke yield from maple wood (32%). 

Ruddy DA, Schaidle JA, FerreU JRI, Wang J, Moens L, Hensley JE. Recent advances in heterogeneous catalysts for bio-oU upgrading via ex situ catalytic fast pyrolysis catalyst development through the study of model compounds. Green Chem 2014 16 454-90. 

Mihalcik DJ, Mullen C A, Boateng AA. Screening acidic zeolites for catalytic fast pyrolysis of biomass and its components. J Anal Appl Pyrolysis 2011 92 224—32. 

Carlson TR, Tompsett GA, Conner WC, Huber GW. Aromatic production from catalytic fast pyrolysis of biomass-derived feedstocks. Top Catal 2009 52 241-52. 

Zhang H, Xiao R, Huang H, Xiao G. Comparison of non-catalytic and catalytic fast pyrolysis of corncob in a fluidized bed reactor. Bioresour Technol 2009 100 1428-34. 

Foster AJ, Jae J, Cheng Y-T, Huber GW, Lobo RF. Optimizing the aromatic yield and distribution from catalytic fast pyrolysis of biomass over ZSM-5. Appl Catal A 2012 423 154-61. 

Li J, Li X, Zhou G, Wang W, Wang C, Komameni S, et al. Catalytic fast pyrolysis of biomass with mesoporous ZSM-5 zeobtes prepared by desibcation with NaOH solutions. Appl Catal A 2014 470 115-22. 

Neumann GT, Hicks JC. Novel hierarchical cerium-incorporated MFl zeobte catalysts for the catalytic fast pyrolysis of bgnocellulosic biomass. ACS Catal 2012 2 642-6. 

Zhang H, Carlson TR, Xiao R, Huber GW. Catalytic fast pyrolysis of wood and alcohol mixtures in a fluidized bed reactor. Green Chem 2012 14 98-110. 

Li X, Su L, Wang Y, Yu Y, Wang C, Li X, et al. Catalytic fast pyrolysis of Kraft bgnin with HZSM-5 zeobte for producing aromatic hydrocarbons. Front Environ Sci Eng 2012 6 295-303. 

Catalytic fast pyrolysis for improved liquid quality... 

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