## 4 Conclusions  
This work studied a different method for the introduction of Al in the HPM-1 framework using in situ generated seeds. Three samples of [Al] HPM-1 were studied after calcination: SiAl15, SiAl25, and SiAl35. In every case, the SiAl15 product had the lowest Si/Al\({}_{\text{TETRA}}\) ratio, but also had the lowest average crystallinity index and the lowest (Al\({}_{\text{TETRA}}\)/Al\({}_{\text{OCTA}}\))\({}_{\text{XPS}}\) of the samples with aluminum. SiAl25 and SiAl35 had similar Si/Al\({}_{\text{TETRA}}\) ratios, even though SiAl35 had more bulk octahedral aluminum. All samples were active for ethanol dehydration, with SiAl25 being the most active because it had the highest values of \({}_{\text{SET}}\), the highest total pore volume, and a higher bulk tetrahedral aluminum content than that of SiAl35. The three catalysts were active to ethanol dehydration, therefore implying that they contained acidic sites. The selectivity results also demonstrated that ethylene production manifests the influence of the Al\({}_{\text{TETRA}}\) acidic sites.  
**Supplementary Materials:** The following are available online at [[http://www.mdpi.com/2076-3417/8/9/1634/s1](http://www.mdpi.com/2076-3417/8/9/1634/s1)]([http://www.mdpi.com/2076-3417/8/9/1634/s1](http://www.mdpi.com/2076-3417/8/9/1634/s1)), Figure S1: Scheme of the synthesis, Figure S2: SEM/EDX mapping of the sample SiAl25, Figure S3: Nitrogen sorption isotherm (SiAl15), Table S1: Textural analysis of the calcined sample SiAl15, Figure S4: Nitrogen sorption isotherm (SiAl25), Table S2: Textural analysis of the calcined sample SiAl25, Figure S5: Nitrogen sorption isotherm (SiAl35), Table S3: Textural analysis of the calcined sample SiAl35.  
**Author Contributions:** Conceptualization and Methodology, P.V., A.R. and S.B.C.P.; Synthesis, P.V. and A.R.; Characterization, P.V., A.R., E.R.-C. and S.B.C.P.; Catalysis, P.V., A.E.V.d.A. and T.P.B.; Writing, P.V., A.R., A.E.V.d.A., E.R.-C., T.P.B. and S.B.C.P.  
**Funding:** This research was funded by CAPES (Brazil), MINECO (Spain) project number CTQ2015-68951-C3-3-R, and FEDER funds.  
Figure 8: (**a**) Ethanol conversion as a function of time at 250 \({}^{\circ}\)C of the calcined [Al] HPM-1 samples and (**b**) product selectivity.  
\begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Sample** &
\begin{tabular}{c} **Conversion** \\ **(Media, \%)** \\ \end{tabular} & **Selectivity—Ethylene (\%)** & **Selectivity—DEE (\%)** & **SBET (m2 g–1)** & **TPV * (cm3 g–1)** \\ \hline SiAl15 & 20 & 33.6 & 66.4 & 332 & 0.19 \\ SiAl25 & 38 & 26.3 & 73.7 & 631 & 0.26 \\ SiAl35 & 20 & 33.4 & 66.6 & 623 & 0.26 \\ \hline \multicolumn{6}{l}{* TPV (total pore volume) included the mesopore volume due to the space between particles. DEE: Diethylether.} \\ \multicolumn{6}{l}{SBET: Brunauer-Emmett-Teller area.} \\ \end{tabular}
\end{table}
Table 5: Textural and catalysis results of the calcined samples SiAl15, SiAl25, and SiAl35.  
**Acknowledgments:** The authors acknowledge PPGCEM, UFRN, UERN and UMA for the installations and financial support. The authors are also grateful to LABPEMOL (Laboratorio de Peneiras Moleculares, UFRN) for the installations for the synthesis, catalysis and the XRD technique, UMA for the MAS NMR and XPS techniques, UERN Chemistry Department for the FEG-SEM micrographs, XRF-DEMAT (Laboratorio de Caracterizacao Estrutural de Materiais, Departamento de Engenharia de Materiais, UFRN) for the XRF data, and the Institute of Chemistry (UFRN) for the IR technique.  
**Conflicts of Interest:** The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.