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Khan MMN, Jayanti S. Minimizing Heat Transfer Resistance in an Integrated Methanol Steam Reformer Designed Using Space-Filling Curves. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Md. Malik Nawaz Khan
- Energy Systems Laboratory, NAC 418, Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
| | - Sreenivas Jayanti
- Energy Systems Laboratory, NAC 418, Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India
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Wei M, Ma H, Lu Q, Ruan D, Ma Z, Chen X. Continuous-Flow Ammoxidation of 2-Methylpyrazine to 2-Cyanopyrazine with High Space-Time Yield in a Microreactor. ACS OMEGA 2022; 7:8980-8987. [PMID: 35309436 PMCID: PMC8928518 DOI: 10.1021/acsomega.2c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
A microreactor (MR) with a vaporization microchamber and a sinusoidal wave microchannel was fabricated to synthesize 2-cyanopyrazine (CP) directly with an aqueous 2-methylpyrazine (MP) solution. A continuous-flow process with high space-time yield was achieved under the premise of strong exothermality of this ammoxidation reaction. The vanadium metal oxide catalysts with four different supports (α-Al2O3, γ-Al2O3, ZSM-5(50), ZSM-5(80)) were evaluated by simply stacking in the wave microchannel from 350 to 540 °C. The process parameters (temperature, reactant ratio, and size of catalysts) were optimized with the selected CrVPO/γ-Al2O3 catalyst, and an optimal ammoxidation process with MP conversion (X MP) of 71.5% and CP selectivity (S CP) of 93.7% was obtained by a volume space velocity (GHSV) of 13 081 h-1 at 480 °C. Correspondingly, the space-time yield of CP (STYCP) was 1724-77 082 gCPkgcat -1h-1, which was the highest value ever reported for this reaction. Meanwhile, the ammoxidation reaction showed a great continuous-synthesis stability of 50-h running in the microreactor with the CP yield (Y CP) remaining 56%-68%.
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Affiliation(s)
- Meixiu Wei
- Key
Laboratory of General Chemistry of the National Ethnic Affairs Commission, Southwest Minzu University, Chengdu, Sichuan 610225, China
- Key
Laboratory of Pollution Control Chemistry and Environmental Functional
Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs
Commission, Southwest Minzu University, Chengdu, Sichuan 610225, China
| | - Haoran Ma
- Microfluidic
Synthesis and Separation Laboratory, College of Chemistry and Environment, Southwest Minzu University, Chengdu, Sichuan 610041, China
| | - Qilin Lu
- Microfluidic
Synthesis and Separation Laboratory, College of Chemistry and Environment, Southwest Minzu University, Chengdu, Sichuan 610041, China
| | - Da Ruan
- Microfluidic
Synthesis and Separation Laboratory, College of Chemistry and Environment, Southwest Minzu University, Chengdu, Sichuan 610041, China
| | - Zhengdong Ma
- Microfluidic
Synthesis and Separation Laboratory, College of Chemistry and Environment, Southwest Minzu University, Chengdu, Sichuan 610041, China
| | - Xiao Chen
- Key
Laboratory of General Chemistry of the National Ethnic Affairs Commission, Southwest Minzu University, Chengdu, Sichuan 610225, China
- Key
Laboratory of Pollution Control Chemistry and Environmental Functional
Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs
Commission, Southwest Minzu University, Chengdu, Sichuan 610225, China
- Microfluidic
Synthesis and Separation Laboratory, College of Chemistry and Environment, Southwest Minzu University, Chengdu, Sichuan 610041, China
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