Analysis of Tetrahydrofuran and Methanol in Distillation Residue Samples by Automated Headspace Solid-Phase Microextraction--Gas Chromatography with Flame Ionization Detection

Gavlick, Walter K.

doi:10.1093/chromsci/38.3.117

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…Therefore, it is important to detect the concentration of THF vapor in air. Traditional techniques for detecting THF include gas chromatography, tandem mass spectrometry, etc., but the large size of the equipment and the complexity of sample preparation made these methods unable to meet modern sensing requirements. In recent years, sensors with ultra‐small sizes have gained advance rapidly, which are more appropriate for real‐time online detection.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Design and Simulation Optimization of Photonic Crystal Cavity for Tetrahydrofuran Vapor Sensing

Wang

Siyu

et al. 2019

Physica Status Solidi (b)

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A photonic crystal (PC) cavity with high quality factor (Q), wide measurement range, and high refractive index (RI) sensitivity is proposed and its possibility in tetrahydrofuran (THF) vapor sensing is theoretically demonstrated. The resonance characteristics of the PC cavity are simulated and optimized by using finite difference time domain (FDTD) method. Cholesteric liquid crystal (CLC) is selected as an example to infiltrate into local air holes of the PC cavity. Since the RI of the CLC and consequently the resonance wavelength of the PC cavity would change with the variation of the THF vapor concentration, this proposed PC cavity can be used for THF vapor sensing. By optimizing structural parameters of several air holes, the simulation results show that the RI sensitivity can be up to 194 nm RIU−1, along with a high Q of 2 × 105 and a detection limit (DL) as low as 4 × 10−5 RIU. For the THF sensing, the theoretical sensitivity and detection limit of THF vapor concentration can be 0.128 nm · L mmol−1 and 0.06 mmol L−1, respectively. Besides, it was theoretically verified that the PC cavity sensor has the ability to maintain RI sensitivity over a wide refractive index range of 1.33–1.53, enabling it to measure more other parameters.

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Section: Introductionmentioning

confidence: 99%

“…a) Transmission spectra of PC cavity (r1 ¼ 0.4a, r 2 ¼ 0.3a, b ¼ 0)under different refractive indices of CLC; b) resonant wavelength and quality factor of PC cavity when the THF concentration is changed from 0 to 31.5 mmol L À1 .…”

mentioning

confidence: 99%

Theoretical Design and Simulation Optimization of Photonic Crystal Cavity for Tetrahydrofuran Vapor Sensing

Wang

Siyu

et al. 2019

Physica Status Solidi (b)

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“…However, in the production of acrylic acid and acrylate, distillation residue is often generated during rectification due to the unsaturated bonds in acrylic acid and acrylic ester (Pereira et al, ; Suresh & Jaikrishna, ). The harmful residue contains a large amount of complex organic pollutants such as acrylate polymers that cause environmental damage, and thus, effective methods should be implemented to properly dispose of acrylic acid production residue (Gavlick, ; Pereira et al, ).…”

Section: Introductionmentioning

confidence: 99%

Effective treatment of residue of acrylic acid production using a fluid‐bed/fixed‐bed system with low energy consumption

Liu

et al. 2019

Water Environment Research

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In order to effectively deal with large amounts of complex organic pollutants in the harmful distillation residues with low energy consumption, a novel two-stage fluid-bed/fixed-bed system was designed to catalyze oxidation of acrylic acid production residue. The effects of fluid-bed temperature, gaseous hourly space velocity (GHSV), and oxygen excess rate on the purification of acrylic acid production residue in the two-stage fluid-bed/fixed-bed system were studied to prove the feasibility of the method. The chemical oxygen demand (COD) of the discharged liquid was <100 mg/L, and the volatile organic compounds (VOCs) of the discharged gas amounted to <10 mg/m 3 with a fluid-bed temperature of 380°C, emulsified residue's GHSV of 0.28 L/(kg cat ·hr), and O 2 excessive rate of more than 4.32. The result of techno-economics indicates the feasibility of the long-term operation of process. Results further illustrate the advantages of the proposed two-stage fluid-bed/fixedbed system, which can treat acrylic acid production residue with high efficiency (COD < 100 mg/L, VOCs < 10 mg/m 3 ) and low energy consumption (~24,856 kw·hr/ ton) in the chemical industry. © 2019 Water Environment Federation • Practitioner points• A novel two-stage fluid-bed/fixed-bed system was developed for acrylic acid production residue treatment. • No extra energy was required at low temperature in the two-stage fluid-bed/fixedbed system. • Purification of residue could be finished at low temperature by the catalytic pyrolysis and catalytic oxidation process. • The two-stage system did not produce toxic gases and particulate matters.

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“…23 Headspace solidphase micro-extraction (SPME) coupled with gas chromatography and ame ionization detection was applied to the analysis of tetrahydrofuran and methanol in distillation residue samples. 24 HSGC-FID was used for the determination of residual solvents in biological uids. 22 In addition, residual nhexane and acetone in an active ingredient derived from beeswax was analyzed using HSGC.…”

Section: Introductionmentioning

confidence: 99%

Static headspace gas chromatographic method for the determination of residual solvents in cephalosporins

Gad¹,

Zaazaa

Amer

et al. 2015

RSC Adv.

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Analysis of Tetrahydrofuran and Methanol in Distillation Residue Samples by Automated Headspace Solid-Phase Microextraction--Gas Chromatography with Flame Ionization Detection

Cited by 5 publications

References 5 publications

Theoretical Design and Simulation Optimization of Photonic Crystal Cavity for Tetrahydrofuran Vapor Sensing

Theoretical Design and Simulation Optimization of Photonic Crystal Cavity for Tetrahydrofuran Vapor Sensing

Effective treatment of residue of acrylic acid production using a fluid‐bed/fixed‐bed system with low energy consumption

Static headspace gas chromatographic method for the determination of residual solvents in cephalosporins

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