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Ab Initio Calculation of BN Generation from Boron and Nitrogen Oxides

机译:从头计算从硼和氮氧化物生成BN

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摘要

Boron Nitride (BN) is one of the products produced in the burning of boron-containing propellant.A possible reaction mechanism for the reactions of boron and nitrogen oxides (NO,NO_2,N_2O) has been studied using the G2MP2 method.The BN product can be formed in the reactions of B(~4P) with NO,NO_2 and N_2O.Among these three reactions,B(~4P)+NO_2 and B(~4P)+N_2O are 181.42 kJ/mol and 160.92 kJ/mol more-exothermic than the B(~4P)+NO reaction.The barrier heights from intermediates to transition states are 64.85 kJ/mol and 111.75 kJ/mol for B(~4P)+NO_2 and B(~4P)+N_2O,respectively.However,in the reaction B(~4P)+NO ,the transition from intermediate to product (IM3-> BN+O) is very endothermic by 420.70 kJ/mol.So B(~4P)+N_2O->BN+NO and B(~4P)+NO_2->BN+O_2 are more likely reactions to generate BN than B(~4P)+NO->BN+O.
机译:氮化硼(BN)是含硼推进剂燃烧过程中产生的产物之一。使用G2MP2方法研究了硼与氮氧化物(NO,NO_2,N_2O)反应的可能反应机理。可以在B(〜4P)与NO,NO_2和N_2O的反应中形成。在这三个反应中,B(〜4P)+ NO_2和B(〜4P)+ N_2O分别为181.42 kJ / mol和160.92 kJ / mol更多-比B(〜4P)+ NO反应放热。对于B(〜4P)+ NO_2和B(〜4P)+ N_2O,从中间体到过渡态的势垒高度分别为64.85 kJ / mol和111.75 kJ / mol。但是,在B(〜4P)+ NO反应中,从中间体到产物(IM3-> BN + O)的吸热非常快,为420.70 kJ / mol。因此B(〜4P)+ N_2O-> BN + NO和与B(〜4P)+ NO-> BN + O相比,B(〜4P)+ NO_2-> BN + O_2更可能产生BN。

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