A set of experiment for steam reforming were carried out using NiO at 800C varying the time, after reforming experiment the NiO reduced to Ni with adsorbed C.
Hence, I want to evaluate the amount of Carbon deposited in the NiO catalyst.
Sir A.C.D Angelo, I want to evaluate the deposited C in the NiO catalysis after the reforming experiment.
C content is difficult to find with XRD, but if some Nicarbide is forming that can be evaluated. one can find the C content with other methods like EDAX and EPMA
If carbon is in crystalline form you can try quantitative XRD analysis. But relative amount of crystalline carbon should be considerable in the matrix to get a good peak intensity. First take XRD pattern of the sample and identify the phase and study peak profile before quantitative analysis.
please check the attached link below and I hope to be useful to you
http://www.sciencedirect.com/science/article/pii/S026343680700100X
Can you estimate the amount of carbon in your sample? Maybe you could try NHC-elementary analysis. Is the amount of deposited carbon related to the amount of reduced Ni?
If sample is crystal you can do XRD phase analysis (Rietveld method). EDAX can also predict % mol of C eventhough it is not very accurate.
Low Z elements like Carbon are difficult quantify by XRD, I suggest you use for example XPS spectroscopy it is surface sensitive tecnique.
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