Geopolymers based on spent catalyst residue from a fluid catalytic cracking (FCC) process

This paper assesses the use of alkali activation technology in the valorization of a spent fluid catalytic cracking (FCC) catalyst, which is a residue derived from the oil-cracking process, to produce geopolymer binders. In particular, the effects of activation conditions on the structural characteristics of the spent catalyst- based geopolymers are determined. The zeolitic phases present in the spent catalyst are the main phases participating in the geopolymerization reaction, which is driven by the conversion of the zeolitic material to a highly Al-substituted aluminosilicate binder gel. Higher alkali content and SiO2/Na2O ratio lead to a denser structure with a higher degree of geopolymer gel formation and increased degree of crosslinking, as identified through 29Si MAS NMR. These results highlight the feasibility of using spent FCC catalyst as a precursor for geopolymer production.This study was sponsored by research scholarship BES-2008-002440 and EEBB-2011-43847 from the Ministerio de Ciencia y Tecnologia of Spain, the European regional development fund (FEDER), and the Universitat Politecnica de Valencia (Spain). The participation of SAB and JLP was funded by the Australian Research Council through the Discovery Projects program, and also including partial funding through the Particulate Fluids Processing Centre, a Special Research Centre of the ARC. The authors wish to acknowledge the Advanced Microscopy Facility at The University of Melbourne for assistance with the electron microscopy experiments conducted in this study.Rodriguez Martinez, ED.; Bernal, SA.; Provis, JL.; Gehman, JD.; Monzó Balbuena, JM.; Paya Bernabeu, JJ.; Borrachero Rosado, MV. (2013). Geopolymers based on spent catalyst residue from a fluid catalytic cracking (FCC) process. Fuel. 109:493-502. https://doi.org/10.1016/j.fuel.2013.02.053S49350210

Needs assessment for the establishment of master's degree programs in respiratory care in the Kingdom of Saudi Arabia

Background: Despite recent advancements in the respiratory care (RC) profession, no single institution in the Kingdom of Saudi Arabia (KSA) offers a master's degree program in RC. Methods: A nationwide and validated survey was used to explore the current needs and interests in establishing RC master’s degree programs in the KSA. The process included representatives from the healthcare industry, universities, and professional societies. Results: A total of 1250 stakeholders across the KSA completed the survey. The sample includes 722 (58%) males, 504 (40%) respiratory therapists, 547 (44%) students, 138 (11%) leaders, and 61 (5%) were academic respondents. Most respondents were from Central 491 (39%) and Eastern 307 (25%) regions, with 1003 (80%) of the total sample worked or studied in governmental sectors. 574 (82%) of the leaders and RTs had Bachelor degree and 430 (61%) of them had 1-5 years working experience. According to 80% of the employers and employees, only 0-5% of the RTs in their organization had a master's degree. The calculated mean % of the agreement (agree/strongly agree) on the needs was 83% in all needs’ assessment items, which shows a great support for establishing a master’s in RC to meet the personal, professional and society needs. The mean % of the agreement for the level of interests among all participants was 86%, indicating a great level of interests in establishing a master degree in RC. The agreement % on the needs assessment and level of interests in establishing a master degree in RC in KSA were ≥80% in each stakeholder group. Conclusion: There are obvious needs and interests in establishing master’s degree programs in RC in the KSA. A master's degree in RC should be established to address the growing needs for advanced RC services throughout the nation and enhance RC research