http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Muhammad Hazim Yaacob (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
Ahmad Zuhairi Abdullah,Muhammad Hazim Yaacob,Nor Irwin Basir 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.85 No.-
Single-step selective catalytic dehydrogenation of glycerol to lactic acid requires a catalyst with strongdehydrogenation and hydration capabilities. A multi-component catalyst consisting of an alkaline earthmetal and assisted by a transition metal is deemed essential to achieve yield lactic acid in this multi-stepreaction. A series of NiO/CaO catalysts with different Ni/Ca ratios were synthesized via a co-precipitationmethod and tested for their catalytic activity. The physicochemical properties of the catalysts werestudied through TGA, SEM, N2-adsorption, CO2-TPD and XRD analyses. The NiO particles were relativelysmaller than those of CaO to enable their deposition on the surface of the latter. High amounts of basicsites of more than 4.84 mmol/gcat were detected on the NiO/CaO catalysts. The lactic acid yield wasstrongly influenced by the molar ratio of the NiO/CaO catalysts due to their improved dehydrogenationand hydration capabilities. The synergy between NiO with CaO in the catalyst was also elucidated. The0.43NiO/CaO catalyst exhibited desirable activity with 41.4% lactic acid yield at 89.3% glycerol conversion. A catalyst loading of 15 wt. %, a reaction temperature of 290 C and 1.5 h of reaction time were needed toachieve this conversion. Thus, the combination of NiO/CaO resulted in the synergy towards achievingbetter lactic acid yield in this selective conversion to lactic acid. However, accurate control of the reactionwas critical as the intermediates and lactic acid were highly reactive to participate in other side-reactions.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
