Investigating use of metal-modified HZSM-5 catalyst to upgrade liquid yield in co-pyrolysis of wheat straw and polystyrene

Razzaq, Madiha; Zeeshan, Muhammad; Qaisar, Sara; Iftikhar, Hera; Muneer, Bushra

doi:10.1016/j.fuel.2019.116119

Cited by 75 publications

(35 citation statements)

References 74 publications

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“…The char yield remained almost the same since the pyrolysis reactor would be unaffected by the catalyst. Razzaq et al [6] compared the product yield from the co-pyrolysis of biomass and polystyrene in the presence of different metal-ZSM-5 catalysts (Zn, Co, Fe, Ni). They showed that the addition of metal produced a decrease in the aqueous phase and increase in the organic (oil) phase for Zn-ZSM-5, Co-ZSM-5 and Fe-ZSM-5 as also shown in this work compared to unmodified ZSM-5.…”

Section: Product Yield and Gas Composition From The Co-pyrolysis-catalysis Of Biomass:polystyrenementioning

confidence: 99%

“…Such processes have some disadvantages, for example, hydrotreatment involves addition of expensive hydrogen gas, and zeolite catalysis removes the oxygen as carbon oxides and water, thereby also removing some of the carbon and hydrogen content. A further drawback of zeolite catalysts, particularly ZSM-5 is the propensity to form coke on the catalyst surface, linked to the hydrogen deficient and oxygenrich composition of lignocellulosic biomass [6]. Another recent line of research has sought to introduce a hydrogen donor into the process by co-processing the lignocellulosic waste biomass with a hydrogen-rich feedstock such as waste plastics thereby enhancing the effective H:C ratio [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to further enhance the zeolite catalytic cracking process and reduce coke formation, for co-pyrolysis of biomass and polystyrene, the zeolite catalyst has been modified with metals in an attempt to improve the catalyst properties and in turn improve quality of the upgraded oil. Razzaq et al [6] used a two-stage fixed bed reactor to study the co-pyrolysis of wheat straw and polystyrene coupled with a catalyst reactor. The catalysts investigated were zeolite HZSM-5 and metal modified HZSM-5 impregnated with Co, Ni, Zn and Fe.…”

Section: Introductionmentioning

confidence: 99%

“…The consequence is a reduction in the rate of catalyst coke formation and thereby improved hydrocarbon yield. The addition of metals to ZSM-5 zeolite is also reported to be selective towards the formation of increased single-ring aromatic compounds [6].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

Dyer

Nahil

Williams

2022

J Mater Cycles Waste Manag

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Biomass and waste polystyrene plastic (ratio 1:1) were co-pyrolysed followed by catalysis in a two-stage fixed bed reactor system to produce upgraded bio-oils for production of liquid fuel and aromatic chemicals. The catalysts investigated were ZSM-5 impregnated with different metals, Ga, Co, Cu, Fe and Ni to determine their influence on bio-oil upgrading. The results showed that the different added metals had a different impact on the yield and composition of the product oils and gases. Deoxygenation of the bio-oils was mainly via formation of CO2 and CO via decarboxylation and decarbonylation with the Ni–ZSM-5 and Co–ZSM-5 catalysts whereas higher water yield and lower CO2 and CO was obtained with the ZSM-5, Ga–ZSM-5, Cu–ZSM-5 and Fe–ZSM-5 catalysts suggesting hydrodeoxygenation was dominant. Compared to the unmodified ZSM-5, the yield of single-ring aromatic compounds in the product oil was increased for the Co–ZSM-5, Cu–ZSM-5, Fe–ZSM-5 and Ni–ZSM-5 catalysts. However, for the Ga–ZSM-5 catalyst, single-ring aromatic compounds were reduced, but the highest yield of polycyclic aromatic hydrocarbons was produced. A higher biomass to polystyrene ratio (4:1) resulted in a markedly lower oil yield with a consequent increased yield of gas.

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Section: Product Yield and Gas Composition From The Co-pyrolysis-catalysis Of Biomass:polystyrenementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

Dyer

Nahil

Williams

2022

J Mater Cycles Waste Manag

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show abstract

“…Biomass is an environment-friendly, low cost, and renewable resource; its reasonable development and utilization is the only way to realize a low-carbon economy (Kabir and Hameed 2017;Zhang et al 2018;Razzaq et al 2019). Cellulose is the primary component of biomass.…”

Section: Introductionmentioning

confidence: 99%

Selective preparation of furfural via the pyrolysis of cellulose catalyzed with nitrided HZSM-5

Wang

Liu

Zhang

et al. 2021

BioRes

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Furfural is a high-value compound that can be prepared by catalytic pyrolysis of biomass. In order to improve the selectivity of furfural in the process of cellulose catalytic pyrolysis, the ammonia-modified HZSM-5 (N-HZSM-5) was used as the catalyst for experimental research on a horizontal fixed bed. The effects of different nitriding temperatures and times on N-HZSM-5, and the effects of different catalyst to cellulose (CA to CL) ratios on furfural selectivity were evaluated. The results showed that N-HZSM-5 can effectively improve the selectivity for furfural. At the optimal conditions (nitriding temperature: 800 °C, nitriding time: 6 h, CA to CL ratio: 4), the selectivity of furfural was up to 24%, which was much higher than those of noncatalytic pyrolysis (1.2%) and HZSM-5 catalytic pyrolysis (3.6%). In order to better evaluate the performance of the catalyst, a series of characterizations were carried out on the N-HZSM-5. The results showed that compared with HZSM-5, N-HZSM-5 had an increased pore size, it was less acidic, and it had more uniform surface acidity. It was conducive to the selective formation of furfural. Therefore, the ammonia-modification can effectively control the structure and acidity of HZSM-5, and N-HZSM-5 exhibits a non-negligible potential in catalyzing the pyrolysis of cellulose for furfural.

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Advances in the application of molecular sieves as catalysts for lignin depolymerization—HZSM‐5 as an example

Jia

Zhang

et al. 2022

Env Prog and Sustain Energy

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At present, mankind faces the problem of increasingly serious global environmental crisis and growing shortage of petrochemical resources, making it more and more necessary to seek renewable substitute for petroleum. Biomass resources, which have received widespread attention and worldwide research, are the most common source of renewable carbon. Moreover, they are considered to be the major source of renewable green carbon today. Biomass resources contain three main aggregates, which are cellulose, hemicellulose, and lignin, as well as small amounts of other additional materials. Notably, the aromatic ring ethers linkage inside lignin molecules enables it to serve as a renewable and suitable feedstock for the production of aromatic chemicals and fuels. However, the recognition that lignin is the most difficult lignocellulosic biomass to degrade makes it much less valuable for practical applications. Therefore, in order to achieve high‐value conversion and utilization of lignin and replace non‐renewable fossil resources, the targeted conversion of lignin into chemicals and materials has become one of the major hot research areas. To this end, this article reviews research results on the use of molecular sieves (HZSM‐5) as catalysts for lignin degradation and conversion, providing an outlook on future research directions.

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Investigating use of metal-modified HZSM-5 catalyst to upgrade liquid yield in co-pyrolysis of wheat straw and polystyrene

Cited by 75 publications

References 74 publications

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

Biomass:polystyrene co-pyrolysis coupled with metal-modified zeolite catalysis for liquid fuel and chemical production

Selective preparation of furfural via the pyrolysis of cellulose catalyzed with nitrided HZSM-5

Advances in the application of molecular sieves as catalysts for lignin depolymerization—HZSM‐5 as an example

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