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首页> 外文期刊>RSC Advances >Reducing coke formation in the catalytic fast pyrolysis of bio-derived furan with surface modified HZSM-5 catalysts
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Reducing coke formation in the catalytic fast pyrolysis of bio-derived furan with surface modified HZSM-5 catalysts

机译：使用表面改性的HZSM-5催化剂减少生物衍生的呋喃的催化快速热解过程中的焦炭形成

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摘要

In order to reduce coke yield during catalytic fast pyrolysis of biomass, MgO and 2,4-dimethylquinoline (2,4-DMQ) were selected to reduce the number of external acid sites of HZSM-5. Both MgO and 2,4-DMQ deposition could cause a reduction in total acid sites (both weak acid sites and strong acid sites) and external acid sites of HZSM-5. The modified catalysts were used for the catalytic conversion of bio-derived furan. For the MgO/HZSM-5 catalyst, the effects of amount of MgO deposited and deposition time were studied. The carbon yields of aromatics, C-2-C-5 olefins, total chemicals, CO2 and CO increased at first and then decreased slightly when the deposited amount increased, while the carbon yield of coke decreased first and then increased gradually. Furthermore, as the deposited time increased, the carbon yields of petrochemicals, CO2 and CO increased greatly, whereas that of coke decreased. For the 2,4-DMQ/HZSM-5 catalyst, the effects of 2,4-DMQ treatment amount and treatment time were investigated. The experimental results showed that an increase in 2,4-DMQ treatment amount or treatment time could retard the generation of the target products, CO2 and CO but promote coke formation.
机译：为了降低生物质的催化快速热解过程中的焦炭收率，选择了MgO和2,4-二甲基喹啉（2,4-DMQ）以减少HZSM-5的外部酸位。 MgO和2,4-DMQ沉积都可能导致HZSM-5的总酸位（弱酸位和强酸位）和外部酸位减少。改性催化剂用于生物衍生呋喃的催化转化。对于MgO / HZSM-5催化剂，研究了MgO沉积量和沉积时间的影响。随着沉积量的增加，芳烃，C-2-C-5烯烃，总化学物，CO2和CO的碳产率先升高，然后略有降低，而焦炭的碳产率先降低，然后逐渐升高。此外，随着沉积时间的增加，石化产品的碳产率，CO2和CO的碳产率大大增加，而焦炭的碳产率却下降。对于2,4-DMQ / HZSM-5催化剂，研究了2,4-DMQ处理量和处理时间的影响。实验结果表明，增加2,4-DMQ的处理量或处理时间可延迟目标产物CO2和CO的生成，但会促进焦炭的形成。

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