Hydrocracking reaction rate
Thread Content
There are two points I don’t understand in the Q&A on hydrocracking technology; please help me out, experts! 1. Raw materials with large molecular structures undergo hydrogen cracking reactions more rapidly due to two reasons: they are easily adsorbed by catalysts, and their C-C bond energies are low! Prone to cracking! 2. Dry points and raw materials with high relative molecular weights have high kinematic viscosity, which makes internal diffusion difficult; moreover, their complex structures and large steric hindrances result in slow reaction rates! Not easy to crack! Please provide an analysis! Two different theories in the same book!
You are very good at thinking! Both of these theories hold true. In actual production, the second type of influence is more significant! For example, if the weight of the raw materials suddenly increases, the second factor becomes dominant, while the first factor plays a lesser role.
I think one is heavy fouling in the space, and the other is molecular weight; they are two different concepts!
For compounds with large spatial structures, the relative molecular weight is not necessarily high; when the number of carbon atoms is the same, there are many isomers – cis and trans isomers – that have the same relative molecular weight but different spatial structures