Catalytic Pyrolysis of Cellulose over SAPO-11 Using Py-GC/MS

Abstract

The catalytic pyrolysis of cellulose was carried out over SAPO-11 for the first time. Pyrolyzer-gas chromatography/mass spectroscopy was used for the in-situ analysis of the pyrolysis products. The acid sites of SAPO-11 converted most levoglucosan produced from the non-catalytic pyrolysis of cellulose to furans. In particular, the selectivity toward light furans, such as furfural, furan and 2-methyl furan, was high. When the catalyst/ cellulose ratio was increased from 1/1 to 3/1 and 5/1, the increase in the quantity of acid sites led to the promotion of deoxygenation and the resultant increase of the contents of light furan compounds. Because furans can be used as basic feedstock materials, the augmentation of the economical value of bio-oil through the catalytic upgrading over SAPO-11 is considerable.

Catalytic Pyrolysis of Wild Reed over a Zeolite-Based Waste Catalyst

“…The production of aromatics was promoted by catalysis and the effect of catalysis was stronger when the catalyst dosage was higher. This result is in good agreement with the reports of previous studies that acid sites are required to produce aromatics during biomass pyrolysis [4,5,7,9,16]. BTEX are very important raw materials in the petrochemical industry.…”

“…Further, when the biomass-to-catalyst ratio was 1:10, virtually no levoglucosan remained. The conversion of levoglucosan on the acid sites of catalysts to furans and aromatics has been reported repeatedly in previous studies [6,16,17].…”

“…The conversion of levoglucosan on the acid sites of catalysts to furans and aromatics has been reported repeatedly in previous studies [6,16,17]. Furans are widely used in the petrochemical industry for producing furan resin, fuel additives, and medicines.…”

“…Furans are widely used in the petrochemical industry for producing furan resin, fuel additives, and medicines. Furans are known to be produced from the dehydration reaction of carbohydrate (e.g., levoglucosan) on the acid sites of catalysts [16]. The increase in furans content due to catalysis was smaller than the reduction in levoglucosan content ( Figure 5).…”

“…The increase in furans content due to catalysis was smaller than the reduction in levoglucosan content ( Figure 5). This was attributed to the conversion of levoglucosan to furanones and cyclocompounds due to dehydrogenation [17] and the production of aromatics due to aromatization reaction [16].…”