Siauw Ng

Dr. Siauw Ng


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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13 December 2019 in Catalysts
Verified
Journal Article
Open access
PDF file
WHWanpeng Hu
Wanpeng Hu
HWHUI WANG
HUI WANG
HLHongfei Lin
Hongfei Lin
YZYing Zheng
Ying Zheng
SNSiauw Ng
Siauw Ng
RXRuoqian Xu
Ruoqian Xu
The roles of catalyst acidity and basicity playing in catalytic conversion of oleic acid were studied in a fixed-bed micro-reactor at atmospheric pressure. The chemical compositions of the petroleum-like products were obtained and the reaction pathways of different catalysts are discussed. The metal oxides are suitable for upgrading oleic acid into organic liquid products (OLPs). Over 98% oxygen was removed when CaO, MgO, and TiO2 were implemented, whereas a minimum oxygen removal lower than 20% was obtained by using quartz. The oxygen removal was 73% by alumina; however, the light oil yield (to feed) and the valuable product yield received were the highest in all investigated catalysts. The hydrocarbons in OLPs, overwhelmingly presenting in the product, were found to be alkenes and cycloalkenes, followed by saturated hydrocarbons, and then aromatics lower than 4%. For Lewis acidic catalysts, higher acidity of the catalyst is beneficial to deoxygenation but also secondary cracking. CaO has higher dehydrogenation capability than MgO does.

15 August 2019 in Catalysts
Verified
Journal Article
Open access
PDF file
HWHUI WANG
HUI WANG
KRKyle Rogers
Kyle Rogers
Haiping ZhangHaiping Zhang
Haiping Zhang
GLGuoliang Li
Guoliang Li
JPJianglong Pu
Jianglong Pu
SNSiauw Ng
Siauw Ng
Waste cooking oil (WCO) hydrotreating to produce green diesel is good for both the environmental protection and energy recovery problems. The roles of catalyst support and reaction temperature on reactions during WCO hydrotreating process were evaluated over an unsupported and a commercial sulfided cobalt and molybdenum (CoMoS) catalyst supported by a mixture of Al2O3, TiO2, and SiO2. The presence of catalyst support helped to improve the dispersion and enlarge the surface area of CoMoS, and was found to be a key factor in reducing reaction temperature, in enhancing the hydrodeoxygenation (HDO) and hydrogenation capabilities, and in decreasing polymerization capability. The increase of reaction temperature strongly improved the deoxygenation, hydrogenation, and cracking reaction activities. Compared to the unsupported CoMoS, the supported one exhibited good deoxygenation and hydrogenation capabilities at 340 °C in WCO hydrotreating to produce diesel fraction; however, high temperature operation needs to be carefully controlled because it may cause overcracking and dehydrogenation.

4 April 2013 in Applied Petrochemical Research
Verified
Journal Article
Open access
PDF file
SNSiauw Ng
Siauw Ng
CFCraig Fairbridge
Craig Fairbridge
SMSateesh Mutyala
Sateesh Mutyala
YLYAN LIU
YAN LIU
JBJacqueline M. R. Bélanger
Jacqueline M. R. Bélanger
JPJ. R. Jocelyn Paré
J. R. Jocelyn Paré
A novel microwave reactor has been constructed for the conversion of ethane to ethylene. The bench-top, pilot-scale facility is capable of conventional furnace heating and microwave-assisted heating, thus allowing direct comparative studies between the conventional industry-wide process and the novel microwave-assisted conversion process. The latter makes use of chemical substances called susceptors that are good microwave absorbers and can transfer heat energy to the surrounding environment. The ethane feed stream is thus heated to achieve thermal conversion to ethylene. Data validating the apparatus and preliminary data on the feasibility of conversion are presented.

18 May 2021 in Energy & Fuels
Verified
Journal Article
Closed access
SNSiauw Ng
Siauw Ng
NHNicole E. Heshka
Nicole E. Heshka
YZYing Zheng
Ying Zheng
HLHao Ling
Hao Ling
JWJinsheng Wang
Jinsheng Wang
FDFuchen Ding
Fuchen Ding

1 March 2020 in Catalysts
Verified
Journal Article
Open access
PDF file
SNSiauw Ng
Siauw Ng
NHNicole E. Heshka
Nicole E. Heshka
YZYing Zheng
Ying Zheng
HLHao Ling
Hao Ling
JWJinsheng Wang
Jinsheng Wang
HWHUI WANG
HUI WANG
This study deals with a systematic investigation of the fluid catalytic cracking (FCC) performance of a bitumen-derived virgin heavy gas oil (HGO) in the presence of its counterpart from bitumen-derived synthetic crude oil (SCO). The objective is to determine the amelioration effect on yield and product slate by the addition of the premium SCO HGO. The 343–525 °C cut virgin bitumen HGO was obtained from distillation of a raw Athabasca oil sands bitumen. It was then blended with different amounts of the 343 °C+ fraction of commercial SCO. Four HGO blends were prepared containing 75, 64, 61, and 48 v% of SCO HGO. Each HGO blend, as well as 100% SCO HGO, were catalytically cracked at 500 and 520 °C using a bench-scale Advanced Cracking Evaluation (ACE) unit. The results show acceptable FCC performance of bitumen virgin HGO when an adequate amount of SCO HGO is added. However, the resulting liquid product may need some quality improvement before use. Several observations, including catalyst poisoning by feed nitrogen and the refractory nature of virgin HGO, are evident and help to explain some observed cracking phenomena.

1 July 2018 in Green Energy & Environment
Verified
Journal Article
Open access
SNSiauw Ng
Siauw Ng
NHNicole E. Heshka
Nicole E. Heshka
CLCecile Lay
Cecile Lay
EDWARD LITTLEEDWARD LITTLE
EDWARD LITTLE
YZYing Zheng
Ying Zheng
FDFuchen Ding
Fuchen Ding