BATU ALAM

NADITIRA WIDYA, BALAR BANJARMASIN, 2012

Membicarakan Filsafat Alam tidak dapat dipisahkan dari paradigma Filsafat barat dan Filsafat Timur. Keduanya dipengaruhi oleh keadaan lingkungannya. Tulisan ini hendak menguraikan bagaimana alam pikiran dan pengetahuan masyarakat Nusantara didalam memandang Alamnya.

Processes, 2021

Propylene glycol, also known as 1,2 propanediol, is one of the most important chemicals in the industry. It is a water-soluble liquid, considered by the U.S. Food and Drug Administration as safe to manufacture consumer products, including foodstuffs, medicines, and cosmetics. This chemical has essential properties, such as solvent, moisturizer, or antifreeze, in addition to a low level of toxicity. This paper aims to present the selection, simulation, and dimensioning of a trickle bed reactor at a laboratory scale. The sizing was validated with other authors. Two predictive models have been considered for reactor modeling, intrinsic kinetics and coupled intrinsic kinetics, along with mass transfer equations and the wetting of the catalyst particles. The model was implemented using Aspen Custom Modeler® (20 Crosby Dr. Bedford, MA 01730, EE. UU.) to study the reactor behavior in terms of conversion. The results show the profiles of different variables throughout the reactor and presen...