Biomass catalytic pyrolysis to produce olefins and aromatics with a physically mixed catalyst

Zhang, Huiyan; Xiao, Rui; Jin, Baosheng; Xiao, Guomin; Chen, Ran

doi:10.1016/j.biortech.2013.04.094

Cited by 160 publications

(101 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The low hydrocarbon yields, deoxygenation, and high coke formation are in accordance with several studies on alumina as a catalyst for pyrolysis vapor upgrading [26][27][28][29][30][31] and also on the impact of alumina binder on methanol-to-gasoline over HZSM- [52] [3] and on propane aromatization over HZSM-5-type gallosilicates [22]. However, the low yields with alumina binder are in contrast to the results of Zhang et al [33] who found physical mixtures of HZSM-5 and 10 % alumina to increase aromatic formation. The increased yields in the physical mixture with low levels of Even with the lowest ratio of biomass to catalyst (0.1) tested here, oxygenate formation was significant over HZSM-5/Al 2 O 3 and the catalyst did not completely upgrade pyrolysis vapors to hydrocarbons.…”

Section: Hzsm-5/al2o3supporting

confidence: 80%

“…However, Zhang et al [32] found c-Al 2 O 3 to be an efficient cracking catalyst and produce high fractions of unidentified GC-detected oxygenated products and low char and coke yields. Zhang et al [33] further tested physical mixtures of an HZSM-5 based catalyst and alumina for catalytic pyrolysis of rice stalks in a fluidized bed reactor. Increased aromatic and olefin yields and reduced coke were obtained, when 10 % alumina was mixed with HZSM-5.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Catalytic Pyrolysis of Pine Over HZSM-5 with Different Binders

et al. 2015

View full text Add to dashboard Cite

Three HZSM-5 catalysts with different binders (alumina, silica, and clay) were evaluated for upgrading of pine pyrolysis vapors. All catalysts were based on the same HZSM-5 with silica to alumina molar ratio of 30. Experiments in micro-scale analytical Py-GCMS/FID showed that fresh catalysts with silica and clay produced predominantly aromatic hydrocarbons at similar carbon yields. The catalyst with alumina gave lower vapor yields and produced both hydrocarbons and partially deoxygenated products, in particular furans. The catalyst with alumina also gave higher coke yields and exhibited faster deactivation than the catalysts with clay and silica binders. The low hydrocarbon yields and coke formation were attributed to the acidic sites provided by alumina and blocking of the zeolite sites. The catalysts with silica and clay as binders were further tested in a 2-inch fluidized bed system for ex situ catalytic pyrolysis of pine. Similar oils were produced over both catalysts with carbon yields of approximately 23 % and oxygen contents of 20-21 %.

show abstract

Section: Hzsm-5/al2o3supporting

confidence: 80%

Section: Introductionmentioning

confidence: 98%

Catalytic Pyrolysis of Pine Over HZSM-5 with Different Binders

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Zhang and Xiao reported that LOSA-1 (similar to ZSM-5) mixed with γ-Al2O3, CaO and MCM-41 had efficient catalytic activity on biomass-derived oxygenates conversion into hydrocarbons. The microporous and mesoporous mixed catalysts were proposed with a significant ability to crack the large-molecule oxygenates into small-molecule oxygenates through the strong cracking characteristic of the adding materials [24].…”

Section: Products Of Sorbitol Transformationmentioning

confidence: 99%

Jet-Fuel Range Hydrocarbons from Biomass-Derived Sorbitol over Ni-HZSM-5/SBA-15 Catalyst

Weng

Qiu

et al. 2015

Catalysts

View full text Add to dashboard Cite

Aromatics and cyclic-hydrocarbons are the significant components of jet fuel with high energy-density. However, conventional technologies for bio-fuel production cannot produce these products without further aromatization and isomerization. In this work, renewable liquid fuel with high content of aromatics and cyclic-hydrocarbons was obtained through aqueous catalytic conversion of biomass sorbitol over Ni-HZSM-5/SBA-15 catalyst. Texture characteristics of the catalyst were determined by physisorption of N2, which indicated its bimodal pore structures were microporous (HZSM-5, pore width: 0.56 nm) and mesoporous (SBA-15, pore width: 8 nm). The surface acidity included weak and strong acid sites, predominantly Lewis type, and was further confirmed by the NH3-TPD and Py-IR analysis. The catalytic performances were tested in a fixed-bed reactor under the conditions of 593 K, WHSV of 0.75 h

show abstract

“…Although zeolite catalysts with micropores exhibited good catalytic activities in the pyrolysis of biomass feedstock, the produced large-molecule oxygenates had difficulty to diffuse into pores, leading to coke formation that decreases bio-oil yield. Zhang et al [105] reported the production of olefin and aromatics from biomass pyrolysis using a macroporous catalyst. The maximum aromatic and olefin yield of 25.3 % was obtained with 10 % Gamma-Al 2 O 3 /90 % LOSA-1 as the catalyst.…”

Section: Catalytic Pyrolysis Of Biomassmentioning

confidence: 99%

The Efficient and Sustainable Pyrolysis and Gasification of Biomass by Catalytic Processes

Tong

Chen

et al. 2015

ChemBioEng Reviews

View full text Add to dashboard Cite

The biomass thermochemical conversion process includes two major approaches: pyrolysis and gasification. The advantages of pyrolysis and gasification of biomass feedstock in the presence of various catalyst systems are critically reviewed. The role of a catalyst in pyrolysis of biomass and its major components cellulose, hemicellulose and lignin is investigated. The discussion is focused on elucidating the reaction mechanisms involved in the formation of aromatics and phenols during catalytic pyrolysis. The pyrolysis performance of two major catalyst systems, metal-containing catalysts and zeolite catalysts, is analyzed. The impact of the catalyst on the deoxygenation efficiency is ascertained. In the catalytic gasification process, two major catalyst systems including alkali metals and noble metal catalysts are employed. This review illustrates the function of the catalyst in improving the yields of syngas and hydrogen and the mechanistic aspects of the reduction of tar and char formed during gasification. Ultimately, the review is intended to introduce the state of art in the biomass thermochemical conversion with an emphasis on the importance of the catalyst in producing value-added products.

show abstract

Biomass catalytic pyrolysis to produce olefins and aromatics with a physically mixed catalyst

Cited by 160 publications

References 34 publications

Catalytic Pyrolysis of Pine Over HZSM-5 with Different Binders

Catalytic Pyrolysis of Pine Over HZSM-5 with Different Binders

Jet-Fuel Range Hydrocarbons from Biomass-Derived Sorbitol over Ni-HZSM-5/SBA-15 Catalyst

The Efficient and Sustainable Pyrolysis and Gasification of Biomass by Catalytic Processes

Contact Info

Product

Resources

About