---
_id: '63924'
abstract:
- lang: eng
  text: In a systematic study on the synthesis of aluminophosphates (AlPOs) under
    ionothermal conditions, initially using 1-butyl-3-methylimidazolium bromide ([C4mim]Br)
    as ionic liquid solvent and structure-directing agent, the effect of the reaction
    conditions (i.e. molar P/Al, F/Al and ionic liquid/Al ratios, alternative fluoride
    sources, influence of the ionic liquid’s cation or anion, temperature, reaction
    time) on the framework type was studied in detail. In [C4mim]Br, the formation
    of the more thermodynamically stable AEL framework type proceeds via AFI. The
    framework type can be changed by choosing another anion or cation of the ionic
    liquid. Hence, the successful ionothermal synthesis of the AFI framework AlPO
    is reported by using either N-ethylpyridinium bromide ([C2py]Br) or 1-butyl-3-methylimidazolium
    chloride ([C4mim]Cl). The mineraliser [Me4N]F, rather than HF, has been used for
    the first time as an alternative fluoride source in ionothermal synthesis, which
    can also affect the framework type. Hence, a very efficient synthesis of the LTA
    framework type is reported in [C4mim]Br using [Me4N]F. Ab initio molecular dynamics
    (AIMD) studies showed that the anion bridges between the aluminium atoms of the
    framework and the cation. The interaction is more favoured in the presence of
    the bromide than the chloride, which may be a clue to the question why the AEL
    framework is not formed in the chloride-based ionic liquid. This study opens several
    routes to pursue in the future as numerous ionic liquids are available which can
    be used in ionothermal synthesis.
author:
- first_name: Muhammad Mohsin
  full_name: Azim, Muhammad Mohsin
  last_name: Azim
- first_name: Alfonso
  full_name: Pensado, Alfonso
  last_name: Pensado
- first_name: Barbara
  full_name: Kirchner, Barbara
  last_name: Kirchner
- first_name: Torsten
  full_name: Gutmann, Torsten
  id: '118165'
  last_name: Gutmann
- first_name: Pedro B.
  full_name: Groszewicz, Pedro B.
  last_name: Groszewicz
- first_name: Gerd
  full_name: Buntkowsky, Gerd
  last_name: Buntkowsky
- first_name: Annegret
  full_name: Stark, Annegret
  last_name: Stark
citation:
  ama: 'Azim MM, Pensado A, Kirchner B, et al. Ionothermal synthesis of crystalline
    microporous aluminophosphates: Systematic study on the conditions affecting the
    framework type. <i>Microporous and Mesoporous Materials</i>. 2018;266:204–213.
    doi:<a href="https://doi.org/10.1016/j.micromeso.2018.02.053">10.1016/j.micromeso.2018.02.053</a>'
  apa: 'Azim, M. M., Pensado, A., Kirchner, B., Gutmann, T., Groszewicz, P. B., Buntkowsky,
    G., &#38; Stark, A. (2018). Ionothermal synthesis of crystalline microporous aluminophosphates:
    Systematic study on the conditions affecting the framework type. <i>Microporous
    and Mesoporous Materials</i>, <i>266</i>, 204–213. <a href="https://doi.org/10.1016/j.micromeso.2018.02.053">https://doi.org/10.1016/j.micromeso.2018.02.053</a>'
  bibtex: '@article{Azim_Pensado_Kirchner_Gutmann_Groszewicz_Buntkowsky_Stark_2018,
    title={Ionothermal synthesis of crystalline microporous aluminophosphates: Systematic
    study on the conditions affecting the framework type}, volume={266}, DOI={<a href="https://doi.org/10.1016/j.micromeso.2018.02.053">10.1016/j.micromeso.2018.02.053</a>},
    journal={Microporous and Mesoporous Materials}, author={Azim, Muhammad Mohsin
    and Pensado, Alfonso and Kirchner, Barbara and Gutmann, Torsten and Groszewicz,
    Pedro B. and Buntkowsky, Gerd and Stark, Annegret}, year={2018}, pages={204–213}
    }'
  chicago: 'Azim, Muhammad Mohsin, Alfonso Pensado, Barbara Kirchner, Torsten Gutmann,
    Pedro B. Groszewicz, Gerd Buntkowsky, and Annegret Stark. “Ionothermal Synthesis
    of Crystalline Microporous Aluminophosphates: Systematic Study on the Conditions
    Affecting the Framework Type.” <i>Microporous and Mesoporous Materials</i> 266
    (2018): 204–213. <a href="https://doi.org/10.1016/j.micromeso.2018.02.053">https://doi.org/10.1016/j.micromeso.2018.02.053</a>.'
  ieee: 'M. M. Azim <i>et al.</i>, “Ionothermal synthesis of crystalline microporous
    aluminophosphates: Systematic study on the conditions affecting the framework
    type,” <i>Microporous and Mesoporous Materials</i>, vol. 266, pp. 204–213, 2018,
    doi: <a href="https://doi.org/10.1016/j.micromeso.2018.02.053">10.1016/j.micromeso.2018.02.053</a>.'
  mla: 'Azim, Muhammad Mohsin, et al. “Ionothermal Synthesis of Crystalline Microporous
    Aluminophosphates: Systematic Study on the Conditions Affecting the Framework
    Type.” <i>Microporous and Mesoporous Materials</i>, vol. 266, 2018, pp. 204–213,
    doi:<a href="https://doi.org/10.1016/j.micromeso.2018.02.053">10.1016/j.micromeso.2018.02.053</a>.'
  short: M.M. Azim, A. Pensado, B. Kirchner, T. Gutmann, P.B. Groszewicz, G. Buntkowsky,
    A. Stark, Microporous and Mesoporous Materials 266 (2018) 204–213.
date_created: 2026-02-07T08:58:23Z
date_updated: 2026-02-17T16:19:17Z
doi: 10.1016/j.micromeso.2018.02.053
extern: '1'
intvolume: '       266'
keyword:
- Aluminophosphates
- Ionic liquids
- Ionothermal synthesis
- Microporous materials
- Zeolite analogous
language:
- iso: eng
page: 204–213
publication: Microporous and Mesoporous Materials
status: public
title: 'Ionothermal synthesis of crystalline microporous aluminophosphates: Systematic
  study on the conditions affecting the framework type'
type: journal_article
user_id: '100715'
volume: 266
year: '2018'
...
---
_id: '9783'
abstract:
- lang: eng
  text: To optimize the ultrasound irradiation for cavitation based ultrasound applications
    like sonochemistry or ultrasound cleaning, the correlation between cavitation
    intensity and the resulting effect on the process is of interest. Furthermore,
    changing conditions like temperature and pressure result in varying acoustic properties
    of the liquid. That might necessitate an adaption of the ultrasound irradiation.
    To detect such changes during operation, process monitoring is desired. Labor
    intensive processes, that might be carried out for several hours, also require
    process monitoring to increase their reliability by detection of changes or malfunctions
    during operation. In some applications cavitation detection and monitoring can
    be achieved by the application of sensors in the sound field. Though the application
    of sensors is possible, this necessitates modifications on the system and the
    sensor might disturb the sound field. In other applications harsh, process conditions
    prohibit the application of sensors in the sound field. Therefore alternative
    techniques for cavitation detection and monitoring are desired. The applicability
    of an external microphone and a self-sensing ultrasound transducer for cavitation
    detection were experimentally investigated. Both methods were found to be suitable
    and easily applicable.
author:
- first_name: Peter
  full_name: Bornmann, Peter
  last_name: Bornmann
- first_name: Tobias
  full_name: Hemsel, Tobias
  id: '210'
  last_name: Hemsel
- first_name: Walter
  full_name: Sextro, Walter
  id: '21220'
  last_name: Sextro
- first_name: Takafumi
  full_name: Maeda, Takafumi
  last_name: Maeda
- first_name: Takeshi
  full_name: Morita, Takeshi
  last_name: Morita
citation:
  ama: 'Bornmann P, Hemsel T, Sextro W, Maeda T, Morita T. Non-perturbing cavitation
    detection / monitoring in sonochemical reactors. In: <i>Ultrasonics Symposium
    (IUS), 2012 IEEE International</i>. ; 2012:1141-1144. doi:<a href="https://doi.org/10.1109/ULTSYM.2012.0284">10.1109/ULTSYM.2012.0284</a>'
  apa: Bornmann, P., Hemsel, T., Sextro, W., Maeda, T., &#38; Morita, T. (2012). Non-perturbing
    cavitation detection / monitoring in sonochemical reactors. In <i>Ultrasonics
    Symposium (IUS), 2012 IEEE International</i> (pp. 1141–1144). <a href="https://doi.org/10.1109/ULTSYM.2012.0284">https://doi.org/10.1109/ULTSYM.2012.0284</a>
  bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Maeda_Morita_2012, title={Non-perturbing
    cavitation detection / monitoring in sonochemical reactors}, DOI={<a href="https://doi.org/10.1109/ULTSYM.2012.0284">10.1109/ULTSYM.2012.0284</a>},
    booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Bornmann,
    Peter and Hemsel, Tobias and Sextro, Walter and Maeda, Takafumi and Morita, Takeshi},
    year={2012}, pages={1141–1144} }'
  chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi
    Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.”
    In <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>, 1141–44, 2012.
    <a href="https://doi.org/10.1109/ULTSYM.2012.0284">https://doi.org/10.1109/ULTSYM.2012.0284</a>.
  ieee: P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, and T. Morita, “Non-perturbing
    cavitation detection / monitoring in sonochemical reactors,” in <i>Ultrasonics
    Symposium (IUS), 2012 IEEE International</i>, 2012, pp. 1141–1144.
  mla: Bornmann, Peter, et al. “Non-Perturbing Cavitation Detection / Monitoring in
    Sonochemical Reactors.” <i>Ultrasonics Symposium (IUS), 2012 IEEE International</i>,
    2012, pp. 1141–44, doi:<a href="https://doi.org/10.1109/ULTSYM.2012.0284">10.1109/ULTSYM.2012.0284</a>.
  short: 'P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, T. Morita, in: Ultrasonics
    Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.'
date_created: 2019-05-13T13:18:49Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0284
keyword:
- cavitation
- chemical reactors
- microphones
- process monitoring
- reliability
- ultrasonic applications
- ultrasonic waves
- acoustic properties
- cavitation based ultrasound applications
- cavitation intensity
- change detection reliability
- external microphone
- malfunction detection reliability
- nonperturbing cavitation detection
- nonperturbing cavitation monitoring
- process monitoring
- self-sensing ultrasound transducer
- sonochemical reactors
- sonochemistry
- ultrasound cleaning
- ultrasound irradiation
- Acoustics
- Liquids
- Monitoring
- Sensors
- Sonar equipment
- Transducers
- Ultrasonic imaging
language:
- iso: eng
page: 1141-1144
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
  issn:
  - 1948-5719
quality_controlled: '1'
status: public
title: Non-perturbing cavitation detection / monitoring in sonochemical reactors
type: conference
user_id: '55222'
year: '2012'
...