| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 49687 | Catalysis Communications | 2016 | 4 Pages |
•Increasing MgO loading leads to the increased ratio of Lewis acid sites to Brönsted ones.•The suitable ratio of medium and strong Lewis acid sites to medium and strong Brönsted ones is about 1.•The suitable optimum ratio of total Lewis acid sites to total Brönsted ones is 2–3.•Formation of coke with lower H/C ratio is the main factor accounting for catalyst deactivation.
On-stream stability of fluid catalytic cracking (FCC) naphtha hydro-upgrading catalysts that convert olefins into high-octane isoparaffins and aromatics is crucial for guaranteeing the long-term operation of industrial units, and therefore suppressing catalyst deactivation due to coking becomes the focus of FCC naphtha hydro-upgrading process and catalyst development. Here we report a simple and novel strategy to enhance the on-stream stability of a HZSM-5 based FCC naphtha hydro-upgrading catalyst by magnesium modification. The characterization and catalytic test results showed that the incorporation of a suitable amount of MgO can adjust the ratio of Lewis acid sites to Brönsted ones and thereby significantly improve stability of the resulting catalyst.
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