Sivakumar, V.M.
(School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia)
,
Lam, Kok-Keong
(School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia)
,
Mohamed, Abdul Rahman
(School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia)
이 연구에서는 야자껍질로부터 이상적인 sieving 특성을 갖는 탄소 분자 체(CMS)의 합성을 시도하였다. 그 과정은 세 단계로 이루어지는데 탄소화 과정, 이산화 탄소 활성화 과정, 그리고 polyfurfuryl 알코올 고분자증착 과정이다. 이산화 탄소 활성화에 의해 야자 껍질로부터 만들어진 활성탄(CA)은 CMS의 합성을 위한 원료 물질로 사용되었다. 야자껍질로부터 만들어진 AC를 준비한 다음 AC에 대한 최적의 furfuryl 알코올 과 포름 알데히드 비를 결정하였다. AC에 polyfurfuryl 알코올의 증착을 탄소화 과정에 앞서 수행하였다. 이렇게 고분자가 증착된 AC는 불활성 환경 조건과 $700-900^{\circ}C$온도에서 탄소화 과정을 거친다. 모든 미세세공 물질은 micrometric사의 ASAP/2020을 이용하여 분석되었다. 결과로 AC에 대한 최적의 furfuryl 알코올 과 포름 알데히드 비는 1:2.5로 결정 되었다. 7 ${\AA}$ 이하의 미세세공은 $700^{\circ}C$, $800^{\circ}C$ 그리고 $900^{\circ}C$ 에서 1.5시간 동안 고분자가 증착된 AC에 형성 되었다. 1.5시간 동안 $900^{\circ}C$ 에서 탄소화 온도는 CMS합성을 위한 최적의 조건으로 밝혀졌다. 이러한 조건하에서 생성된 CMS는 5. 884 ${\AA}$의 구멍 크기를 갖는다.
이 연구에서는 야자껍질로부터 이상적인 sieving 특성을 갖는 탄소 분자 체(CMS)의 합성을 시도하였다. 그 과정은 세 단계로 이루어지는데 탄소화 과정, 이산화 탄소 활성화 과정, 그리고 polyfurfuryl 알코올 고분자 증착 과정이다. 이산화 탄소 활성화에 의해 야자 껍질로부터 만들어진 활성탄(CA)은 CMS의 합성을 위한 원료 물질로 사용되었다. 야자껍질로부터 만들어진 AC를 준비한 다음 AC에 대한 최적의 furfuryl 알코올 과 포름 알데히드 비를 결정하였다. AC에 polyfurfuryl 알코올의 증착을 탄소화 과정에 앞서 수행하였다. 이렇게 고분자가 증착된 AC는 불활성 환경 조건과 $700-900^{\circ}C$온도에서 탄소화 과정을 거친다. 모든 미세세공 물질은 micrometric사의 ASAP/2020을 이용하여 분석되었다. 결과로 AC에 대한 최적의 furfuryl 알코올 과 포름 알데히드 비는 1:2.5로 결정 되었다. 7 ${\AA}$ 이하의 미세세공은 $700^{\circ}C$, $800^{\circ}C$ 그리고 $900^{\circ}C$ 에서 1.5시간 동안 고분자가 증착된 AC에 형성 되었다. 1.5시간 동안 $900^{\circ}C$ 에서 탄소화 온도는 CMS합성을 위한 최적의 조건으로 밝혀졌다. 이러한 조건하에서 생성된 CMS는 5. 884 ${\AA}$의 구멍 크기를 갖는다.
In this work, an intention to synthesize the carbon molecular sieve (CMS) with ideal sieving properties from palm shell has been attempted. The process includes three main stages: carbonization, carbon dioxide activation and polymer deposition using polyfurfuryl alcohols. Palm shell based activated ...
In this work, an intention to synthesize the carbon molecular sieve (CMS) with ideal sieving properties from palm shell has been attempted. The process includes three main stages: carbonization, carbon dioxide activation and polymer deposition using polyfurfuryl alcohols. Palm shell based activated carbon (AC) produced by carbon dioxide activation was used as raw material in synthesis of CMS. After preparing palm shell based AC, optimum concentration ratio of furfuryl alcohols and formaldehyde to AC for CMS synthesis was obtained in this study. Deposition of polyfurfuryl alcohols on the palm shell based AC was then carried out prior to carbonization. These polymer deposited AC was subjected to carbonization at $700-900^{\circ}C$ under inert condition. All the microporous materials were analyzed using micromeritics ASAP/2020. The results show that optimum concentration ratio of furfuryl alcohol and formaldehyde to AC is 1:2.5. The micropore with pore width less than 7 ${\AA}$ was formed on the polymer deposited AC at $700^{\circ}C$, $800^{\circ}C$ and $900^{\circ}C$ for 1.5 hours. Carbonization temperature at $900^{\circ}C$ for 1.5 hours was found to be optimum for CMS synthesis. The CMS produced under this condition has pore width of 5.884 ${\AA}$.
In this work, an intention to synthesize the carbon molecular sieve (CMS) with ideal sieving properties from palm shell has been attempted. The process includes three main stages: carbonization, carbon dioxide activation and polymer deposition using polyfurfuryl alcohols. Palm shell based activated carbon (AC) produced by carbon dioxide activation was used as raw material in synthesis of CMS. After preparing palm shell based AC, optimum concentration ratio of furfuryl alcohols and formaldehyde to AC for CMS synthesis was obtained in this study. Deposition of polyfurfuryl alcohols on the palm shell based AC was then carried out prior to carbonization. These polymer deposited AC was subjected to carbonization at $700-900^{\circ}C$ under inert condition. All the microporous materials were analyzed using micromeritics ASAP/2020. The results show that optimum concentration ratio of furfuryl alcohol and formaldehyde to AC is 1:2.5. The micropore with pore width less than 7 ${\AA}$ was formed on the polymer deposited AC at $700^{\circ}C$, $800^{\circ}C$ and $900^{\circ}C$ for 1.5 hours. Carbonization temperature at $900^{\circ}C$ for 1.5 hours was found to be optimum for CMS synthesis. The CMS produced under this condition has pore width of 5.884 ${\AA}$.
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문제 정의
Polyfurfuryl alcohol (PFA)16 is chosen as the polymer to be used. This study aims to synthesize CMS from palm shell by a means of polyfurfuryl alcohol deposition method.
제안 방법
The instrument is fully computerized high vacuum system, which allows the adsorption isotherms for each pressure step monitored in real time using computer algorithm. The reproducibility of the results was checked by preparing several samples under the same conditions and characterizing these samples by gas adsorption unit.
대상 데이터
The primary raw material employed in this research is palm shell, which was obtained from a local oil palm mill (United Palm Oil Mill Sdn. Bhd.). The palm shell was then cleaned, sieved and dried in the oven.
이론/모형
An ASAP/2020 Micromeritics was used to determine the surface area, micropore volume and the pore size distribution. The instrument is fully computerized high vacuum system, which allows the adsorption isotherms for each pressure step monitored in real time using computer algorithm. The reproducibility of the results was checked by preparing several samples under the same conditions and characterizing these samples by gas adsorption unit.
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