Author Archives: Jenike & Johanson

Perry’s Chemical Engineers’ Handbook

I own all eight editions of Perry’s Chemical Engineers’ Handbook. The ninth edition will be issued this year, and Dr. John Carson and I have written the section on bulk solids flow and hopper design. The ninth edition will include our … Continue reading

Posted in Jenike Blog | Tagged , , , , , , | 1 Comment

Site Visits

One of the things that I enjoy about my job as a project engineer at Jenike & Johanson is that I get to travel to many places.  I have visited 40 states and 19 countries.  Sadly, my luggage has gone … Continue reading

Posted in Jenike Blog | Tagged , , |

Moving Bed Catalytic Reactors

Fixed bed catalytic reactors, in which a gaseous reactant stream passes through a catalyst bed, is frequently used for synthesis, combustion, and effluent treatment. Radial flow reactors are preferred when a low pressure drop is desirable. Fixed bed reactors can … Continue reading

Posted in Jenike Blog | Tagged , , , , , , , , |

Jenike & Johanson helps students at AIChE Conference

Compared to liquids and gases, chemical engineers’ education in bulk solids is relatively limited.  Perhaps that’s why whenever I visit a chemical plant, I can easily identify which lines or equipment handle bulk solids – they are the ones with … Continue reading

Posted in Jenike Blog | Tagged , , , , , |

Feeding wet agglomeration processes.

I am a proud, card-carrying member of the IBA, the Institute for Briquetting and Agglomeration.  In 2011, I presented a paper at the IBA Conference on the design of hoppers or bins for feeding wet agglomeration processes.  In wet granulation … Continue reading

Posted in Jenike Blog | Tagged , , , , , |

That new Purge Column smell…

  I am old enough to remember the “new car smell” of the interior of a new automobile. Whenever my parents purchased a new vehicle, they seemed excited when inhaling alkanes and residual styrene monomers. I, on the other hand, … Continue reading

Posted in Jenike Blog | Tagged , , , , , , |

The consolidation of snow

I was always on the losing side of a snowball fight, until I joined Jenike & Johanson. Snowballs lofted at me by my enemies would invariably leave a mark, whereas snowballs that I tossed would disintegrate as they sailed towards my … Continue reading

Posted in Jenike Blog | Tagged , , , , , , , |

Time Tests and the Test of Time – The Jenike Direct Shear Tester

It’s been over fifty years since Andrew Jenike published Bulletin 123, which summarized how he used a direct shear cell tester to measure the flow properties of powders and then used the results to design reliable hoppers, bins, and silos. … Continue reading

Posted in Jenike Blog | Tagged , , , , , , , , , |

What biofuels you?

Not long ago, I browsed a dissertation written by a Ph.D. candidate who had spent years developing models of a biofuels production process.  The manuscript was impressive.  The document was thorough in its derivations based on reaction kinetics, conservation of … Continue reading

Posted in Jenike Blog | Tagged , , , , , |

The Physical Properties of Bulk Solids; or How to Get Through Airport Security

  Gathering physical properties of liquids or gases is usually straightforward. For example, if I needed a fluid’s viscosity and specific gravity to design a system for handling a liquid or gas, I need only to perform a Google search … Continue reading

Posted in Jenike Blog |