PDMS-NaA zeolite 혼합기지분리막에 의한 수소-질소 분리

강태범,홍세령,Kang, Tae Beom,Hong, Se Ryeong 한국막학회 2015 멤브레인 Vol.25 No.3

PDMS에 NaA zeolite를 0~40 wt% 가하여 PDMS-NaA zeolite 막을 제조하였다. SEM 관찰에 의하면 PDMS-NaA zeolite 막 내에 분산되어있는 NaA zeolite 입자의 크기는 $2{\sim}5{\mu}m$이었다. PDMS-NaA zeolite 막의 $N_2$와 $H_2$ 투과도는 막 내의 NaA zeolite 함량이 증가하면 증가하였고, $N_2$보다는 $H_2$의 투과도가 더 컸다. 그리고 PDMS-NaA zeolite 선택성($H_2/N_2$)은 NaA zeolite 함량이 증가하면 증가하였다. PDMS-NaA zeolite membranes were prepared by adding 0~40 wt% NaA zeolite. Based on SEM observation, NaA zeolite was dispersed in the PDMS-NaA zeolite membranes with $2{\sim}5{\mu}m$. The permeabilities of $H_2$ and $N_2$ gases through PDMS-NaA zeolite membranes increased as NaA zeolite contents increased and $H_2$ gas had better permeabilities than $N_2$. The selectivity ($H_2/N_2$) of PDMS-NaA zeolite membranes increased as NaA zeolite contents increased.

혼합기체중 수소분리를 위한 titanium계 합금 제조

강태범 ( Tae Beom Kang ),이현경 ( Hyun Kyung Lee ) 상명대학교 자연과학연구소 2005 自然科學硏究 Vol.14 No.-

Titanium system alloys were prepared from Ti, Co, and Fe metals. In order to investigate the characteristics of these titanium system alloys, we examined that using X-ray diffractometer, PCT. The formation of TiCoxFe1-x(x=0.80~0.65) system alloys with cubic crystal was confirmed by X-ray diffractometer. As the Fe content of TiCoxFe1-x(x=0.80~0.65) system alloys increased, the hysteresis of the hydrogen adsorption-desorption decreased. As a result, we found that the maximum amount of the hydrogen adsorption of TiCoxFe1-x(x=0.80~0.65) system alloys was from H/M=0.9 to H/M=0.13 at 120℃.

국내관측 강지진동을 이용한 부지지반증폭 특성 연구(오대산 및 홍도 지진)

강태범(Tae-Beom Kang),권용정(Yong-Jeong Kwon),박기종(Ki-Jong Park),김준경(Jun-Kyoung Kim) 한국지반환경공학회 2009 한국지반환경공학회 학술발표회논문집 Vol.2009 No.9

PTMSP-Borosilicate 복합막에 의한 수소-질소 기체 분리에 관한 연구

이석호,강태범,Lee, Suk Ho,Kang, Tae Beom 한국막학회 2014 멤브레인 Vol.24 No.6

무정형의 괴상의 다공성 borosilicate는 trimethylborate (TMB)/ tetraethylorthosilicate (TEOS) 몰비 0.01~0.10 겔체를 $700{\sim}800^{\circ}C$ 온도범위에서 열처리 하였을 때 얻어졌다. BET와 SEM 관찰에 의하면 $700{\sim}800^{\circ}C$에서 얻어진 borosilicate의 표면적은 $251.12{\sim}355.62m^2/g$이고, 기공직경은 3.5~4.9 nm이며, 입자크기는 30~60 nm이었다. TGA측정에 의하면 borosilicate가 poly[1-(trimethylsilyl)propyne](PTMSP)에 첨가되었을 때 PTMSP-borosilicate 복합막의 열적 안정성은 향상 되었다. SEM관찰에 의하면 borosilicate는 $1{\mu}m$ 크기로 복합막 내에 분산되어 있었다. 기체투과실험에 의하면 PTMSP에 borosilicate 함량이 증가하면 자유부피, 공동, 기공률이 증가하여 기체투과가 용해확산에 의한 것보다 분자체거름, 표면확산, Knudsen 확산에 의해 일어나는 경우가 점차 증가함으로 해서 $H_2$와 $N_2$의 투과도는 증가하고 선택도($H_2/N_2$)는 감소하였다. The amorphous and porous borosilicate without any cracks was obtained under the following condition : 0.01~ 0.10 mole ratio of trimethylborate (TMB)/ tetraethylorthosilicate (TEOS) and the temperature of $700{\sim}800^{\circ}C$. According to the BET and SEM measurements, borosilicate heat-treated in between 700 and $800^{\circ}C$ showed the surface area of $251.12{\sim}355.62m^2/g$, the pore diameter of 3.5~4.9 nm, and the particle size of 30~60 nm. According to the TGA measurements, the thermal stability of poly[1-(trimethylsilyl)propyne](PTMSP) membrane was enhanced by inserting borosilicate. SEM observation showed that the size of dispersed borosilicate in the composite membrane was $1{\mu}m$. The results showed that the permeability of $H_2$ and $N_2$ increased and the selectivity of $H_2/N_2$ decreased upon the addition of borosilicate into PTMSP membranes. Addition of borosilicate may possibly increase the free volume, cavity and porosity of membranes indicating that permeation occurred by molecular sieving, surface and Knudsen diffusion rather than solution diffusion of gases.

수소분리용 TiCo_xFe_1-x(x=0.50~1.00)계 금속막 제조

장규영,강태범,Jang, Kyu-young,Kang, Tae Beom 한국막학회 2015 멤브레인 Vol.25 No.2

$TiCo_xFe_{1-x}$(x=0.50~1.00)계 합금을 제조하고, 합금의 특성을 X-ray diffractometer (XRD), pressure composition temperature (PCT)곡선, scanning electron microscopy (SEM)에 의해 조사하였고, $TiCo_xFe_{1-x}$(x=0.50~1.00)-stainless steel (SS) 복합막에 대해 $H_2-N_2$ 혼합기체분리실험을 하였다. X-선 회절분석에 의하면 $TiCo_xFe_{1-x}$(x=0.50~1.00)계 합금의 결정구조는 TiCo와 같은 입방정구조이었다. $TiCo_xFe_{1-x}$(x=0.50~1.00)계 합금은 $120^{\circ}C$에서 hysteresis현상을 나타내었고, 합금 중 Fe의 양이 증가함에 따라 x=0.90~1.00과 0.50~0.55 범위에서는 hysteresis가 증가하였고, x=0.55~0.90 범위에서는 감소하였다. 가장 작은 hysteresis를 나타낸 합금은 $TiCo_{0.55}Fe_{0.45}$이었다. $120^{\circ}C$에서 $TiCo_xFe_{1-x}$(x=0.50~1.00)-SS 복합막의 수소투과압력의 최저값은 $TiCo_{0.55}Fe_{0.45}$에서 2.5 atm을 나타내었고, 최대값은 $TiCo_{0.90}Fe_{0.10}$에서 10 atm을 나타내었다. $TiCo_xFe_{1-x}$(x=0.50~.00)-SS 복합막에 의하여 $120^{\circ}C$에서 $H_2-N_2$ 혼합기체를 분리하는 경우, 가장 우수한 복합막은 고압부의 수소투과압력이 2.5 atm으로 가장 낮고, hysteresis가 가장 작은 $TiCo_{0.55}Fe_{0.45}$-SS 복합막이었다. We have studied on the preparation of $TiCo_xFe_{1-x}$(x=0.50~1.00) system alloy, the characteristics of $TiCo_xFe_{1-x}$(x=0.50~1.00) system alloy by X-ray diffractometer (XRD), pressure composition temperature (PCT) curve, scanning electron microscopy (SEM) and the $H_2-N_2$ gas mixture separation of $TiCo_xFe_{1-x}$(x=0.50~1.00)- stainless steel (SS) composite membranes. The formation of $TiCo_xFe_{1-x}$(x=0.50~1.00) system alloys with cubic crystal same as TiCo was confirmed by X-ray diffractometer. $TiCo_xFe_{1-x}$(x=0.50~1.00) system alloys showed the hysteresis at $120^{\circ}C$. As the Fe content of $TiCo_xFe_{1-x}$(x=0.50~1.00) system alloys increased, the hysteresis was increased both range x=0.90~1.00 and x=0.55~0.60, and the range x=0.55~0.90 gave decreased hysteresis. $TiCo_{0.55}Fe_{0.45}$ alloy was the one showed the lowest hysteresis among them. The lowest value of hydrogen permeation pressure of $TiCo_xFe_{1-x}$(x=0.50~1.00)-SS composite membrane was $TiCo_{0.55}Fe_{0.45}$-SS composite membrane with the value of 2.5 atm at $120^{\circ}C$; otherwise, $TiCo_{0.90}Fe_{0.10}$-SS composite had the highest pressure value among the membranes with the value of 10 atm. $TiCo_{0.55}Fe_{0.45}$-SS composite membrane was the best to separate the $H_2-N_2$ gas mixture excellently among the $TiCo_xFe_{1-x}$(x=0.50~1.00)-SS composite membranes since $TiCo_{0.55}Fe_{0.45}$ had the least hysteresis, and hydrogen permeation pressure was the lowest with value of 2.5 atm.

PDMS-SiO₂·B₂O₃ 복합막에 의한 수소-질소 기체 분리

이석호,강태범,Lee, Suk Ho,Kang, Tae Beom 한국막학회 2015 멤브레인 Vol.25 No.2

$SiO_2{\cdot}B_2O_3$ was prepared by trimethylborate (TMB)/tetraethylorthosilicate (TEOS) mole ratio 0.01 at $800^{\circ}C$. PDMS[poly(dimethysiloxane)]-$SiO_2{\cdot}B_2O_3$ composite membranes were prepared by adding porous $SiO_2{\cdot}B_2O_3$ to PDMS. To investigate the characteristics of PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane, we observed PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane using TG-DTA, FT-IR, BET, X-ray, and SEM. PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane was studied on the permeabilities of $H_2$ and $N_2$ and the selectivity ($H_2/N_2$). Following the results of TG-DTA, BET, X-ray, FT-IR, $SiO_2{\cdot}B_2O_3$ was the amorphous porous $SiO_2{\cdot}B_2O_3$ with $247.6868m^2/g$ surface area and $37.7821{\AA}$ the mean of pore diameter. According to the TGA measurements, the thermal stability of PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane was enhanced by inserting $SiO_2{\cdot}B_2O_3$. SEM observation showed that the size of dispersed $SiO_2{\cdot}B_2O_3$ in the PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane was about $1{\mu}m$. The increasing of $SiO_2{\cdot}B_2O_3$ content in PDMS leaded the following results in the gas permeation experiment: the permeability of both $H_2$ and $N_2$ was increased, and the permeability of $H_2$ was higher than $N_2$, but the selectivity($H_2/N_2$) was decreased. 졸겔법에 의해서 trimethylborate (TMB)/tetraethylorthosilicate (TEOS) 몰비 0.01, 온도 $800^{\circ}C$에서 $SiO_2{\cdot}B_2O_3$가 제조되었다. 그리고 제조된 $SiO_2{\cdot}B_2O_3$와 PDMS[poly(dimethylsiloxane)]로부터 PDMS-$SiO_2{\cdot}B_2O_3$ 복합막을 제조하고 막의 물리화학적 특성을 TG-DTA, FT-IR, BET, X-ray, SEM에 의해 조사하고 그리고 $H_2$와 $N_2$의 투과도와 선택도를 조사하였다. TG-DTA, BET, X-ray, FT-IR 측정에 의하면 $SiO_2{\cdot}B_2O_3$는 무정형의 다공성 $SiO_2{\cdot}B_2O_3$였으며, 기공의 평균직경은 $37.7821{\AA}$, 표면적은 $247.6868m^2/g$이었다. TGA 측정에 의하면 PDMS 내에 $SiO_2{\cdot}B_2O_3$가 첨가되었을 때 PDMS-$SiO_2{\cdot}B_2O_3$ 복합막의 열적 안정성은 향상되었다. SEM 관찰에 의하면 $SiO_2{\cdot}B_2O_3$는 약 $1{\mu}m$ 크기로 PDMS 내에 덩어리 상태로 뭉쳐서 분산되어 있었다. 기체투과실험에 의하면 PDMS 내에 $SiO_2{\cdot}B_2O_3$ 함량이 증가하면 $H_2$와 $N_2$의 투과도는 증가하였고, 질소보다 Lenard Jones 분자지름이 작은 $H_2$의 투과도는 $N_2$의 투과도보다 컸으며, 선택도($H_2/N_2$)는 감소하였다.

PEBAX-NaY zeolite 복합막에 의한 기체($H_2$, $N_2$, $CO_2$, $CH_4$) 분리에 관한 연구

김슬기,강태범,Kim, Seul Gi,Kang, Tae Beom 한국막학회 2015 멤브레인 Vol.25 No.1

PEBAX[poly(ether-block-amide)]-NaY zeolite composite membrane was studied on the permeability of penetrant $H_2$, $N_2$, $CO_2$ and $CH_4$ and the selectivity. When the NaY zeolite contents of PEBAX-NaY zeolite membranes were increased, the permeability of $H_2$ was increased, but the permeability of $N_2$, $CH_4$ and $CO_2$ was decreased. By the addition of NaY zeolite into PEBAX, the gas selectivity for $H_2$, $N_2$ and $CO_2$ was decreased except the increase of selectivity of $H_2/N_2$. $CO_2/N_2$, $H_2/CO_2$ and Gas/$CH_4$. The highest selectivity among these gases was from $CO_2$. In particular, the gas selectivity for $CO_2$ was the greatest with a value of 12~156. PEBAX[poly(ether-block-amide)]-NaY zeolite 복합막에 대한 $H_2$, $N_2$, $CO_2$, $CH_4$의 투과도와 선택도에 대하여 연구하였다. PEBAX-NaY zeolite 복합막에 대한 $H_2$, $N_2$, $CO_2$, $CH_4$ 투과도는 막 내의 NaY zeolite 함량이 증가할수록 $H_2$의 투과도는 증가하였고, $N_2$, $CO_2$, $CH_4$의 투과도는 감소하는 경향을 나타내었다. PEBAX-NaY zeolite 복합막 내의 NaY zeolite 함량이 증가함에 따라 $N_2$에 대한 $H_2$와 $CO_2$의 선택도, $CO_2$에 대한 $H_2$의 선택도, 그리고 $CH_4$에 대한 기체 선택도는 증가하였고, 그외의 $H_2$, $N_2$, $CO_2$에 대한 기체($H_2$, $N_2$, $CO_2$, $CH_4$)의 선택도는 감소하였다. 그리고 각 기체들에 대한 가장 높은 선택도는 $CO_2$인 경우에 얻어졌고, $H_2$, $N_2$, $CH_4$에 대한 $CO_2$의 선택도 값은 12~156이었다.

TiCoxFe(1-x)(x=1.00~0.85)계 합금제조

장규영 ( Kyu Young Chang ),강태범 ( Tae Beom Kang ),이현경 ( Hyun Kyung Lee ) 상명대학교 자연과학연구소 2004 自然科學硏究 Vol.13 No.-

마늘로부터 유기 게르마늄 추출에 관한 연구

김지숙 ( Ji Suk Kim ),강태범 ( Tae Beom Kang ),이현경 ( Hyun Kyung Lee ) 상명대학교 자연과학연구소 2004 自然科學硏究 Vol.12 No.-

PTMSP/PDMS-Silica 복합막에 의한 수소-질소 혼합기체 분리에 관한 연구

문선화 ( Sun Hwa Moon ),강태범 ( Tae Beom Kang ),이현경 ( Hyun Kyung Lee ) 상명대학교 자연과학연구소 2005 自然科學硏究 Vol.14 No.-

Silica-filled PTMSP/PDMS membranes were made by dispersing 0-55wt%(based on polymer content) silica particles in the PTMSP/PDMS solution. PTMSP/PDMS-Silica composite membranes were prepared by solution casting method. FT-IR spectrum and SEM pictures have been taken to characterize the membranes. The separation properties of the gas mixture(H2,N2) through the composite membranes were studies as a function of pressure and percentage of silica. The number-average and weight-average molecular weight of PTMSP/PDMS graft copolymer were 1.78×105 and 4.39×105, respectively. The PTMSP/PDMS-Silica layer that was observed on the cross sections of the membranes is about 5 to 10㎛ thick layer. The total thickness of PTMSP/PDMS-Silica-PEI composite membrane is about 145㎛. The separation factor of H2/N2 increased as the pressure of permeation cell and silica content of the membrane increased. PTMSP/PDMS-Silica 55wt% composite membrane was shown to possess separation factor(α=6.927) of H2/N2 which is about 2.3 times larger than that of PTMSP/PDMS composite membrane at △P 30psi and 25℃.