Simulation and optimization of fixed bed solid acid catalyzed isobutane/2-butene alkylation process

Li, You; Liu, Ruixia; Zhao, Guoying; Zhou, Zhimao; Zhang, Junping; Shi, Chao; Liu, Xiaomin; Zhang, Xiangping; Zhang, Suojiang

doi:10.1016/j.fuel.2017.12.050

Cited by 27 publications

(12 citation statements)

References 36 publications

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“… 4 These disadvantages of conventional catalysts motivate researchers to develop novel candidates for C4 alkylation, such as solid acids and ionic liquids 5–9 . Although solid acids present a good initial activity and selectivity, the rapid deactivation is the inherent drawback to limit the large‐scale industrial application 10–12 . Also, the research about ionic liquids as novel catalysts for C4 alkylation has more rapidly grown owing to the process advantages, and the commercial use of ionic liquid‐based alkylation technology has been reported 9,13 .…”

Section: Introductionmentioning

confidence: 99%

H₂SO₄‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

et al. 2021

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To deeply understand the role of surfactants on the acid/C4 hydrocarbon miscibility, the catalytic activity and molecular‐level interfacial properties of long‐alkyl‐chain cationic surfactants (hexadecyltrimethylammonium bromide, CATB and dihexadecyldimethylammoniumchloride, DDAB) and anionic one (sodium dodecyl benzene sulfonate, SDBS) were studied as additives for H2SO4 alkylation using experiments and molecular dynamics simulations. Surfactant additives are found to efficiently decrease by‐products and promote higher selectivity of trimethylpentanes (TMPs) and higher research octane number (RON), which is attributed to the improvement of acid/hydrocarbons interface, including better interfacial dispersion, higher I/O ratio, and lower interfacial tension. Surfactant additives show an interfacial intensification, quite different from intrinsic reaction intensification by low temperature. Combination of SDBS additive and lower temperature contributes to significantly higher TMP selectivity and higher RON up to 84.20 wt% and 99.07 at 269.2 K from 60.21 wt% and 94.34 at 281.2 K, respectively. The information provides good reference for the industrial H2SO4 alkylation.

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Section: Introductionmentioning

confidence: 99%

H₂SO₄‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

et al. 2021

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“…Simultaneously, solid acids and ionic liquids (ILs) are considered as novel catalyst candidates. The current alkylation still strongly relies on the H 2 SO 4 as catalyst, 2–6 because of the potential leakage risks of HF, rapid deactivation of solid acids, and the high operating cost and difficult disposal of spent ILs 7–9 . However, the H 2 SO 4 catalyst also has several fatal drawbacks, including serious equipment corrosion, huge spent acid, and secondary pollution caused by disposal of spent acid.…”

Section: Introductionmentioning

confidence: 99%

Target high‐efficiency ionic liquids to promote H₂SO₄‐catalyzed C4 alkylation by machine learning

Zheng

Sun

et al. 2022

AIChE Journal

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To predict and rationally design high-efficiency ionic liquids (ILs) additives for H 2 SO 4catalyzed alkylation, the quantitative structure-activity relationship between 11,000 ILs and interfacial properties of H 2 SO 4 alkylation was established by combination of molecular dynamics simulation, semi-empirical density function theory, and machine learning. The results indicate that ILs additives with longer alkyl chain can significantly broaden interfacial thickness and decrease interfacial tension, in which the cation-and anion-based descriptors play a synergistic prominent role. Based on the intensified interfacial properties, series of novel ILs additives with different alkyl chain length in both cations and anions are prepared, which present the ability to efficiently promote catalytic performance of H 2 SO 4 at trace addition amount and increase research octane number (RON) of alkylate up to 98.08 from 95.87 in pure H 2 SO 4 system. This work provides a strategy for prediction and rational design of high-efficiency additives to enhance the liquid-liquid interfacial properties.

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“…11 Current industrial alkylation processes use hydrouoric (HF) or sulfuric acid (H 2 SO 4 ) as the catalysts. 12 This leads to serious safety and environmental risks from the transport and storage of the concentrated liquid acids. The equipment corrosion and the process of dealing with the acid-oil sludges produced as byproducts are also big problems.…”

Section: Introductionmentioning

confidence: 99%

A facile way to improve zeolite Y-based catalysts' properties and performance in the isobutane–butene alkylation reaction

Zhou

Zhang

et al. 2020

RSC Adv.

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Simulation and optimization of fixed bed solid acid catalyzed isobutane/2-butene alkylation process

Cited by 27 publications

References 36 publications

H₂SO₄‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

H₂SO₄‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

Target high‐efficiency ionic liquids to promote H₂SO₄‐catalyzed C4 alkylation by machine learning

A facile way to improve zeolite Y-based catalysts' properties and performance in the isobutane–butene alkylation reaction

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Simulation and optimization of fixed bed solid acid catalyzed isobutane/2-butene alkylation process

Cited by 27 publications

References 36 publications

H2SO4‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

H2SO4‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

Target high‐efficiency ionic liquids to promote H2SO4‐catalyzed C4 alkylation by machine learning

A facile way to improve zeolite Y-based catalysts' properties and performance in the isobutane–butene alkylation reaction

Contact Info

Product

Resources

About

H₂SO₄‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

H₂SO₄‐catalyzed isobutane alkylation under low temperatures promoted by long‐alkyl‐chain surfactant additives

Target high‐efficiency ionic liquids to promote H₂SO₄‐catalyzed C4 alkylation by machine learning