Catalytic Aspects in the Synthesis of a Promising Energetic Material

Irina L. Simakova, Valentin N. Parmon

Результат исследования: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

Synthesis of a promising energetic material CL-20 requires the two-step catalytic re-functionalization of N-bonded benzyl groups (CH2-C6H5) of hexabenzylhexaazaisowurtzitane (HBIW) into acetyl (-CO-CH3) or formyl groups (-CHO) over Pd/C catalyst before its direct nitrolysis into final CL-20 product. Utilization of an expensive palladium-based catalyst deactivated fast during reaction contributes substantially to a high CL-20 cost being a significant hurdle limiting wide application of CL-20 in a propellant formulation. In this work a careful systematic study was performed to improve efficiency, resistance to deactivation, and life-time of Pd/C catalysts as well as to elucidate the optimal hydrodebenzylation reaction conditions. The catalyst activity decrease for Pd/C was found to be caused mainly by agglomeration of metal nanoparticles, Pd re-deposition on inaccessible inner areas of the carbon support, and blocking of the metallic palladium with by-products of intermediates destruction. Different ways to enhance Pd/C catalytic activity through an improvement of Pd dispersion and resistance of Pd particles to agglomeration and re-oxidation as well as through an increase of Pd accessibility for large HBIW molecules were proposed. The two-step HBIW debenzylation with a separately repeated use of the catalyst in each catalytic stage was considered as a promising way to increase catalyst productivity and to diminish CL-20 production costs.

Язык оригиналаанглийский
Название основной публикацииCHEMICAL ROCKET PROPULSION: A COMPREHENSIVE SURVEY OF ENERGETIC MATERIALS
РедакторыLT DeLuca, T Shimada, VP Sinditskii, M Calabro
ИздательSPRINGER-VERLAG BERLIN
Страницы697-724
Число страниц28
ISBN (печатное издание)978-3-319-27746-2
DOI
СостояниеОпубликовано - 2017
Событие12th International Workshop on Combustion and Propulsion - New Energetic Materials for Space Exploration - Milan, Италия
Продолжительность: 9 июн 201410 июн 2014

Серия публикаций

НазваниеSpringer Aerospace Technology
ИздательSPRINGER-VERLAG BERLIN
ISSN (печатное издание)1869-1730

Конференция

Конференция12th International Workshop on Combustion and Propulsion - New Energetic Materials for Space Exploration
СтранаИталия
ГородMilan
Период09.06.201410.06.2014

Цитировать

Simakova, I. L., & Parmon, V. N. (2017). Catalytic Aspects in the Synthesis of a Promising Energetic Material. В LT. DeLuca, T. Shimada, VP. Sinditskii, & M. Calabro (Ред.), CHEMICAL ROCKET PROPULSION: A COMPREHENSIVE SURVEY OF ENERGETIC MATERIALS (стр. 697-724). (Springer Aerospace Technology). SPRINGER-VERLAG BERLIN. https://doi.org/10.1007/978-3-319-27748-6_29