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首页> 外文期刊>Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications >Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: Towards a reaction model
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Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: Towards a reaction model

机译：通过一氧化碳和在活性炭催化剂上通过一氧化碳和二氯反应的光气相同：朝向反应模型

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摘要

The reaction of carbon monoxide and dichlorine over an activated carbon (Donau Supersorbon K40) to produce phosgene is examined. Individual reagent and product breakthrough measurements over the clean catalyst establish the magnitude of adsorption coefficients (K) to follow the trend: K-Cl2 > K-COCl2 K-CO. Chlorine adsorption measurements indicate a distribution of active sites that conforms to a two-site model, with the sites classified according to their enthalpy of adsorption. At 323 K, Type-I and Type-II sites exhibit respective adsorption capacities of 2.8 +/- 0.3 and 1.5 +/- 0.4 mmol Cl-2 g(cat)(-1). Post-reaction temperature-programmed desorption measurements alongside elemental analysis (SEM-EDAX) confirm the presence of retained chlorine moieties at the catalyst surface. These observations are rationalised within a postulated reaction scheme that accounts for sustained phosgene synthesis over the selected activated carbon.
机译：研究了一氧化碳和二氯在活性炭（Donau Supersorbon K40）上生成光气的反应。清洁催化剂上的单个试剂和产品突破性测量确定了吸附系数（K）的大小，以遵循以下趋势：K-Cl2>K-COCl2>K-CO。氯吸附测量表明活性位点的分布符合双位点模型，根据吸附焓对位点进行分类。在323 K时，I型和II型位置的吸附容量分别为2.8+/-0.3和1.5+/-0.4 mmol Cl-2 g（cat）（-1）。反应后程序升温脱附测量以及元素分析（SEM-EDAX）证实了催化剂表面存在残余氯部分。这些观察结果在假设的反应方案中合理化，该反应方案解释了所选活性炭上持续的光气合成。

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