Study on Several Mesoporous Materials Catalysts Applied to the Removal of Trace Olefins from Aromatics and Commercial Sidestream Tests

Chen, Changwei; Wu, Wenjing; Zeng, Xian-song; Jiang, Zhen-hong; Shi, Li

doi:10.1021/ie901062c

Cited by 28 publications

(27 citation statements)

References 4 publications

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“…The distance between layers of bentonite can be determined based on the position of the characteristic reflection peak (001) in the XRD patterns. In Figure 2a, the XRD pattern of Bent had a characteristic (001) reflection at approximately 7.10° (2θ) [25], while the peak position shifted to 5.51° (2θ) after Bent was modified with PAA. Results calculated by the Bragg equation showed that the shift in the distance between layers was from 1.24 nm (Bent) to 1.60 nm (Bent-PAA) when Bent was modified with PAA.…”

Section: Resultsmentioning

confidence: 99%

Bentonite Modified by Allylamine Polymer for Adsorption of Amido Black 10B

Guo

Xia²,

Pei

et al. 2019

Polymers

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The main object of this work is to remove Amido black 10B using a new type of bentonite-based adsorbent with cationic groups by the modification of polyallyl amines between the interlayers of bentonite. Fourier transform infrared, X-ray diffraction, thermogravimetric analysis, and scanning electron microscopy were used to characterize the functionalized bentonite. A series of batch adsorption experiments were performed. The maximum adsorption amount was 144.08 mg g−1 when the pH was 2 and the contact time was 120 min. In addition, the equilibrium isotherm data were analyzed using Langmuir and Freundlich isotherm models, while only the Langmuir model could provide a high correlation. Therefore, this study provided a new functionalized bentonite as a low-cost adsorbent for dye removal from water.

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Section: Resultsmentioning

confidence: 99%

Bentonite Modified by Allylamine Polymer for Adsorption of Amido Black 10B

Guo

Xia²,

Pei

et al. 2019

Polymers

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“…Clay is known to be a highly versatile material due to its widely known applications in various industries, many of which are shown in Fig. 1 7,15‐26 …”

Section: Introductionmentioning

confidence: 99%

“…1. 7,[15][16][17][18][19][20][21][22][23][24][25][26] The olefin content of a hydrocarbon stream is measured with its Bromine Index (BI) in accordance with ASTM D 2710-92 standard. 27,28 The BI corresponds to the bromine milligrams consumed by a 100 g liquid hydrocarbon sample.…”

Section: Introductionmentioning

confidence: 99%

“…[32][33][34][35][36] On the other hand, due to their porosity, reactivity, and thermal stability, much attention has been focused on clays as catalysts and catalyst supports. 21,[37][38][39][40] However, the share of adsorption and catalytic properties of clay in the removal of aliphatic compounds from aromatic streams have not been evaluated in previous research.…”

Section: Introductionmentioning

confidence: 99%

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Optimizing temperature and introducing new process arrangements for elevating clay's longevity based on the known poisons in the separation process of trace olefins from aromatics

Rouhani

Farhadi

Kenari

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The clay treatment widely utilized to reduce unsaturated components in aromatic stream has a detrimental effect on catalyst lifetime. Due to the short lifetime of commercial clay, a huge number of studies have been carried out to address this problem over the last decade. This study aims to optimize the temperature for longer serviceability of clay by removal of unsaturated aliphatic components from aromatic streams through the adsorption and catalytic properties of clay. A novel process arrangement is introduced by scheduling the reuse of deactivated clay that is discarded after deactivation. RESULTS Results showed that the suitable range of temperature for olefin removal is 155–205 °C, and the optimum temperature with the lowest operational cost was 185 °C, which is then gradually elevated to 205 °C. CONCLUSION The new process arrangements utilize these results and elevate clay's lifetime by almost 3.5 times, leading to an economical solution on an industrial scale. © 2021 Society of Chemical Industry (SCI).

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“…These olefins must be removed for their negative effect on the following process. Clay treatment have been widely used for removing trace olefins from aromatics 20 with the drawbacks of limited lifetime and the used clay could not reuse except discard as solid waste. A growing awareness of environmental protection in the chemical industry asks for finding an efficient and cost-effective method to remove olefins in aromatics.…”

Section: Introductionmentioning

confidence: 99%

Reuse of Spent FCC Catalyst for Removing Trace Olefins from Aromatics

Pu¹,

Luan²,

Shi³

2012

Bulletin of the Korean Chemical Society

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Pretreatment of spent FCC catalyst and its application in remove trace olefins in aromatics were investigated in this research. The most effective pretreatment route of spent FCC catalyst was calcining at 700 o C for 1 h, washing with 5% oxalic acid solution in ultrasonic reactor and dried. Treated spent FCC catalyst was modified with metal halides, then to prepare catalyst to remove trace olefins in aromatics. X-ray diffraction, Pyridine-FTIR, N2 adsorption-desorption and inductively coupled plasma optical emission spectrometer (ICP-OES) were used to investigate the pretreatment process. The result showed that the performance of the treated spent FCC catalyst was much greater than that of the spent FCC catalyst, which indicted the possibility and improvement of this research.

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Study on Several Mesoporous Materials Catalysts Applied to the Removal of Trace Olefins from Aromatics and Commercial Sidestream Tests

Cited by 28 publications

References 4 publications

Bentonite Modified by Allylamine Polymer for Adsorption of Amido Black 10B

Bentonite Modified by Allylamine Polymer for Adsorption of Amido Black 10B

Optimizing temperature and introducing new process arrangements for elevating clay's longevity based on the known poisons in the separation process of trace olefins from aromatics

Reuse of Spent FCC Catalyst for Removing Trace Olefins from Aromatics

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