Investigation of membrane wetting in different absorbents at elevated temperature for carbon dioxide capture

Wang, Zhen; Ma, Qinhui; Yu, Hai; Wei, Chiao-Chien; Luo, Zhongyang

doi:10.1016/j.memsci.2013.12.057

Cited by 29 publications

(19 citation statements)

References 40 publications

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“…In contrast, no swelling phenomenon was found on membrane surface after 60 h DCMD process. Membrane swelling was dependent with liquid entry pressure (LEPw) according to Laplace-Young equation (Lv et al, 2010;Wang et al, 2014) which was determined by contact angle between membrane surface and water. As we can see from Fig.…”

Section: Stability Of the Pvdf Hollow Fiber Membranementioning

confidence: 99%

A hybrid process combining homogeneous catalytic ozonation and membrane distillation for wastewater treatment

Zhang

Zhao

et al. 2016

Chemosphere

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h i g h l i g h t s g r a p h i c a l a b s t r a c tFor the first time, homogeneous catalytic ozonation and membrane distillation were coupled in a membrane reactor. Organics and salts were efficiently removed and the homogenous catalyst was almost 100% recovered simultaneously. Membrane fouling was effectively mitigated compared to MD process.a r t i c l e i n f o b s t r a c tA novel catalytic ozonation membrane reactor (COMR) coupling homogeneous catalytic ozonation and direct contact membrane distillation (DCMD) was developed for refractory saline organic pollutant treatment from wastewater. An ozonation process took place in the reactor to degrade organic pollutants, whilst the DCMD process was used to recover ionic catalysts and produce clean water. It was found that 98.6% total organic carbon (TOC) and almost 100% salt were removed and almost 100% metal ion catalyst was recovered. TOC in the permeate water was less than 16 mg/L after 5 h operation, which was considered satisfactory as the TOC in the potassium hydrogen phthalate (KHP) feed water was as high as 1000 mg/L. Meanwhile, the membrane distillation flux in the COMR process was 49.8% higher than that in DCMD process alone after 60 h operation. Further, scanning electron microscope images showed less amount and smaller size of contaminants on the membrane surface, which indicated the mitigation of membrane fouling. The tensile strength and FT-IR spectra tests did not reveal obvious changes for the polyvinylidene fluoride membrane after 60 h operation, which indicated the good durability. This novel COMR hybrid process exhibited promising application prospects for saline organic wastewater treatment.

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Section: Stability Of the Pvdf Hollow Fiber Membranementioning

confidence: 99%

A hybrid process combining homogeneous catalytic ozonation and membrane distillation for wastewater treatment

Zhang

Zhao

et al. 2016

Chemosphere

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“…The results indicated that PP membrane was much more stable than PVDF membrane in membrane stripping process. Membrane wetting is the main reason that results in the reduction on regeneration efficiency [7,14]. For the fresh membrane, the pores of the membrane remain completely gas-filled.…”

Section: Stability Of Different Membrane Materials In Membrane Strippingmentioning

confidence: 99%

“…In addition, the micropore size of PP membrane is smaller than PVDF membrane in this work, as shown in Table 1. Membrane with smaller pore size will be more difficult to suffer membrane wetting based on Young-Laplace equation [14]. Therefore, PP membrane is a better choice than PVDF in the process of membrane stripping.…”

Section: Stability Of Different Membrane Materials In Membrane Strippingmentioning

confidence: 99%

Membrane Stripping Technology for CO2 Desorption from CO2-rich Absorbents with Low Energy Consumption

Wang

Zhao

et al. 2014

Energy Procedia

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CO 2 membrane stripping is a novel method for CO 2 desorption at low temperature (around 348K) for amine-based CO 2 capture, which has the potential to reduce regeneration energy requirement. In this work, we investigated CO 2 membrane stripping with two different commercial hollow fiber membranes, polypropylene (PP) and Polyvinylidene fluoride (PVDF). CO 2 membrane stripping in PVDF membrane showed a faster CO 2 desorption rate than in PP membrane, but PP membrane presented a better stability on long-term running. Energy consumption for CO 2 membrane stripping with 20 wt% MEA solvent was evaluated. Compared with conventional thermal regeneration, 28% energy can be saved if regeneration pressure of CO 2 membrane stripping operated at 20 kPa.

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“…The organic absorbents can penetrate into partial pores of the membrane because of their low surface tensions, and decrease mass transfer flux due to lower gas diffusivity in the wetted membrane phase. Moreover in a long-term operation, the organic absorbents can intrude into membrane matrix and significantly change the membrane morphology, pore size distribution, and membrane porosity [6], and will result in continuous deterioration of the mass transfer performance. To minimize the membrane wetting problem, the operating pressure should be kept below a critical value known as the penetration pressure.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effects of operating parameters on the local mass transfer coefficient and membrane wetting in a membrane gas absorption process

Rongwong¹,

Cao²,

Liang

et al. 2015

Journal of Membrane Science

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Investigation of membrane wetting in different absorbents at elevated temperature for carbon dioxide capture

Cited by 29 publications

References 40 publications

A hybrid process combining homogeneous catalytic ozonation and membrane distillation for wastewater treatment

A hybrid process combining homogeneous catalytic ozonation and membrane distillation for wastewater treatment

Membrane Stripping Technology for CO2 Desorption from CO2-rich Absorbents with Low Energy Consumption

Investigation of the effects of operating parameters on the local mass transfer coefficient and membrane wetting in a membrane gas absorption process

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