Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)

Tae Uk Han; Beom Sik Yoo; Young Min Kim; Byeong Ah Hwang; Gamal Luckman Sudibya; Young Kwon Park; Seungdo Kim

doi:10.1007/s11814-018-0051-7

Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)

Tae Uk Han
, Beom Sik Yoo
, Young Min Kim
, Byeong Ah Hwang
, Gamal Luckman Sudibya
, Young Kwon Park
, Seungdo Kim

School of Environmental Engineering

Hallym University

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

We examined the conversion of HFC-134a over five catalysts, Na₂CO₃, CaO, CaCO₃, and two types of γ-Al₂O₃ with different surface areas, between 300 and 600 °C. HFC-134a was barely converted via the non-catalytic reaction, even at the highest temperature (600 °C). The operating temperatures for the catalytic conversion of HFC-134a were reduced dramatically and its efficiency increased with increasing temperature. Among the catalysts used, γ-Al₂O₃ with the larger surface area showed the highest conversion rate of HFC-134a, which was followed, in order, by γ-Al₂O₃ with the smaller surface area, CaCO₃, CaO, and Na₂CO₃. The conversion rate of γ-Al₂O₃ decreased rapidly due to catalyst deactivation. The catalytic efficiency of γ-Al₂O₃ was maintained for a longer period by water addition. Water acted as a hydrogen donor for the dehydrofluorination reaction.

Original language	English
Pages (from-to)	1611-1619
Number of pages	9
Journal	Korean Journal of Chemical Engineering
Volume	35
Issue number	8
DOIs	https://doi.org/10.1007/s11814-018-0051-7
State	Published - 1 Aug 2018

Keywords

Catalytic Conversion
HFC-134a
Hydrolysis
Reaction Pathways
γ-AlO

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title = "Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)",

abstract = "We examined the conversion of HFC-134a over five catalysts, Na2CO3, CaO, CaCO3, and two types of γ-Al2O3 with different surface areas, between 300 and 600 °C. HFC-134a was barely converted via the non-catalytic reaction, even at the highest temperature (600 °C). The operating temperatures for the catalytic conversion of HFC-134a were reduced dramatically and its efficiency increased with increasing temperature. Among the catalysts used, γ-Al2O3 with the larger surface area showed the highest conversion rate of HFC-134a, which was followed, in order, by γ-Al2O3 with the smaller surface area, CaCO3, CaO, and Na2CO3. The conversion rate of γ-Al2O3 decreased rapidly due to catalyst deactivation. The catalytic efficiency of γ-Al2O3 was maintained for a longer period by water addition. Water acted as a hydrogen donor for the dehydrofluorination reaction.",

keywords = "Catalytic Conversion, HFC-134a, Hydrolysis, Reaction Pathways, γ-AlO",

author = "Han, \{Tae Uk\} and Yoo, \{Beom Sik\} and Kim, \{Young Min\} and Hwang, \{Byeong Ah\} and Sudibya, \{Gamal Luckman\} and Park, \{Young Kwon\} and Seungdo Kim",

note = "Publisher Copyright: {\textcopyright} 2018, Korean Institute of Chemical Engineers, Seoul, Korea.",

year = "2018",

month = aug,

day = "1",

doi = "10.1007/s11814-018-0051-7",

language = "English",

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T1 - Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)

AU - Han, Tae Uk

AU - Yoo, Beom Sik

AU - Kim, Young Min

AU - Hwang, Byeong Ah

AU - Sudibya, Gamal Luckman

AU - Park, Young Kwon

AU - Kim, Seungdo

PY - 2018/8/1

Y1 - 2018/8/1

N2 - We examined the conversion of HFC-134a over five catalysts, Na2CO3, CaO, CaCO3, and two types of γ-Al2O3 with different surface areas, between 300 and 600 °C. HFC-134a was barely converted via the non-catalytic reaction, even at the highest temperature (600 °C). The operating temperatures for the catalytic conversion of HFC-134a were reduced dramatically and its efficiency increased with increasing temperature. Among the catalysts used, γ-Al2O3 with the larger surface area showed the highest conversion rate of HFC-134a, which was followed, in order, by γ-Al2O3 with the smaller surface area, CaCO3, CaO, and Na2CO3. The conversion rate of γ-Al2O3 decreased rapidly due to catalyst deactivation. The catalytic efficiency of γ-Al2O3 was maintained for a longer period by water addition. Water acted as a hydrogen donor for the dehydrofluorination reaction.

AB - We examined the conversion of HFC-134a over five catalysts, Na2CO3, CaO, CaCO3, and two types of γ-Al2O3 with different surface areas, between 300 and 600 °C. HFC-134a was barely converted via the non-catalytic reaction, even at the highest temperature (600 °C). The operating temperatures for the catalytic conversion of HFC-134a were reduced dramatically and its efficiency increased with increasing temperature. Among the catalysts used, γ-Al2O3 with the larger surface area showed the highest conversion rate of HFC-134a, which was followed, in order, by γ-Al2O3 with the smaller surface area, CaCO3, CaO, and Na2CO3. The conversion rate of γ-Al2O3 decreased rapidly due to catalyst deactivation. The catalytic efficiency of γ-Al2O3 was maintained for a longer period by water addition. Water acted as a hydrogen donor for the dehydrofluorination reaction.

KW - Catalytic Conversion

KW - HFC-134a

KW - Hydrolysis

KW - Reaction Pathways

KW - γ-AlO

UR - https://www.scopus.com/pages/publications/85048827945

U2 - 10.1007/s11814-018-0051-7

DO - 10.1007/s11814-018-0051-7

M3 - Article

AN - SCOPUS:85048827945

SN - 0256-1115

VL - 35

SP - 1611

EP - 1619

JO - Korean Journal of Chemical Engineering

JF - Korean Journal of Chemical Engineering

IS - 8

ER -

Catalytic conversion of 1,1,1,2-tetrafluoroethane (HFC-134a)

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Keywords

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