Propane ammoxidation over MoVTeNb oxide catalyst in a microchannel reactor

Abstract

Propane ammoxidation (PAO) is a promising way to produce acrylonitrile from propane instead of propylene. It is found that the catalytic performances of MoVTeNb oxide catalyst for PAO including product selectivity and catalyst stability are very sensitive to the reaction temperature, requiring a narrow temperature window of 440–450 °C to maintain low selectivity to COx. Owing to the large heat transfer surface area and short heat transfer distance, the temperature gradient in a microchannel reactor (0.5 × 12.7 × 80 mm) can be maintained at less than 0.5 °C as opposed to 43.2 °C in a conventional fixed bed tubular reactor with an inner diameter of 4 mm at a reactor wall temperature of 440 °C. Therefore, PAO reaction can be operated in a microchannel reactor under much harsher reaction conditions to achieve a higher productivity (189.9 kmol/m3·h) while still maintaining a low COx selectivity and high catalyst stability. © 2018 American Institute of Chemical Engineers AIChE J, 64: 4002–4008, 2018

Progress in synthetic strategy and industrial preparation of aliphatic nitriles

“…20世 纪90年代, 三菱化学公司 [20] 发明了一种新型的混合金 属氧化物Mo-V-Te-Nb-O y 催化剂, 通过Mo、V、Te和 Nb四种组分协同作用催化性能最好, 具有高丙烷转化 率(80%~90%)及相对较高的丙烯腈收率(59%). 目前应 用最广的Mo-V-Te-Nb-O y 催化体系由三个晶相组成 [21] : Lin等 [22] 发现Mo-V-Te-Nb氧化物催化剂对丙烷氨 含锑催化剂的丙烯腈产率与含碲类似物的丙烯腈产率 相当. 日本Asahi公司 [23] 在Mo-V-Nb-Sb-O的商业化应 Baek等 [25] 采用浸渍法制备了不同磷含量的Mo-V-P-O y /…”

Electrochemical Reduction of CO2 to CO on Hydrophobic Zn Foam Rod in a Microchannel Electrochemical Reactor

“…Recently, the microchannel reactor has obtained the attention of many scientific researchers due to its remarkable mass and heat transfer performance [18,19]. The application of the microchannel reactor in the CO 2 ERR can increase the mass transfer of CO 2 , thereby increasing the selectivity of the required products [20].…”

Electrochemical Conversion of CO2 to CO into a Microchannel Reactor System in the Case of Aqueous Electrolyte

“…Over the past few decades, micron- and millimeter-scale apparatuses, including both single-channel and multichannel catalytic reactors, have attracted worldwide attention due to their excellent mass and heat transfer efficiency, outstanding safety performance, ease to scale-up property, etc. − We believe that the microreactor principle as a process intensification approach is also valid in the design of an efficient reactor for the electrochemical CO 2 reduction.…”