Lindelani Ndlovu

5 Questions 4 Answers 0 Followers

Questions related from Lindelani Ndlovu

For Al2O3, with the Iso-electric point around 8-9, is the pH always adjusted when impregnating with a metal precursor solution?

I use transition metal precursors as active components on the alumina support, I saw one method from the publication where pH was not adjusted when preparing the catalyst. My understanding is,...

07 July 2018 1,009 0 View

In the preparation of a supported catalyst using impregnation (IWI or WI), what is the reason for pre-drying (oven) a support before impregnating it?

I am using SiO2 and Al2O3 as support materials in catalyst development and in some methods it is mentioned that the support is dried (pre-heating in the oven) before impregnation. I want to...

07 July 2018 2,631 0 View

What effect does the injection volume has on the GC analysis (quantitative)?

I am using peak areas to calculate moles so as to get conversion and selectivity for the reaction I run. I decreased the volume from what I have been using all along to get area that is within the...

07 July 2018 5,020 1 View

PV = nRT one of the conditions is that the equation is applicable at 'low pressures'. Is 4bar within or out of that 'low pressure' range?

What pressure range is the Ideal gas equation applicable?

11 November 2017 7,891 0 View

How do I access data from the Joint Committee of Powder Diffraction Standards (JCPDS) database [now PDF]?

I am doing a catalyst (Silica & Alumina supported) characterization using X-ray diffraction. I am looking for a reference spectra for CuO and Ag.

01 January 1970 4,301 7 View